STM32?

[alowhum]

So.. I accidentally bought something from Aliexpress that I thought was a cheap Arduino Nano.

But it's not.

It's an STM32F103C8T6. It has an arm chip.

Is it useable with MySensors? Does it emulate an Arduino Nano? Of so, it looks like it has more memory, so could that be useful? It's cheaper too, and it has lots of 3v lines.

I just found this page where someone talks about their adventures with this board. Hmm...

[hek]

Support is soon in place thanks to @PhracturedBlue and @tekka.

https://github.com/mysensors/MySensors/pull/795

[alowhum]

Cool!

• Cheaper
• Faster
• More memory
• More storage
• 5v and lots of 3V lines

Any downsides? How stable is the 3V line? Does it use more power?

[gohan]

I think it is missing serial pins, so if you don't need serial communications you should be ok. Of course the older 328p has much wider support, but eventually in time more people will buy the STM32

[tbowmo]

@gohan

It does contain serial interfaces, and more than one.. In many aspects, cortex m0, m3 etc, are way superior compared to the atmega 328...

[gohan]

Well I probably confused with another Arduino board

[VaZso]

@alowhum I use the same board as dev board and it works well, I had no problems with it using STM32's own libraries.
It has I2C, SPI, UART, even USB and 5V-tolerant inputs and so on.
I like it.

[gohan]

but for a battery powered sleeping node it is better a mini pro that hasn't the usb chip that drains power, right?

[scalz]

@gohan
This ST32 board doesn't have any usb chip, and doesn't need one, because the mcu already includes this feature.

[alowhum]

This board just keeps getting better and better.

Is there a way to try out this new functionality? I coincidentally could really use a 3.3 volt Arduino with micro-USB port.

I don't like that the Pro Mini doesn't have a micro usb port for powering it. The Digispark Pro does have it, but I don't know if MySensors supports it. More importantly, it's twice as expensive.

[mfalkvidd]

@alowhum a bit off topic, but I've bought a few micro usb connectors to be able to use the ubiquitous phone chargers to power Pro Minis.

To try out the new functionality, order a few STM32. Then use the master MySensors branch from github. https://github.com/mysensors/MySensors/pull/795 will probably have been merged by the time your boards arrive If they haven't you can use tekka's branch.

[scalz]

Also, little sidenote, it's low power mcu i think, maybe not pico like 328p. And i don't know about the mysensors sleep functions (not implemented yet i think).
But that said, it's a nice competitive alternative, like others ARM mcus which are very versatile (a bit more advanced than simple 8bit 328p) .

Big thx to @tekka for his work on this nice addition, you rock

Digispark pro may run mysensors, for very simple, no big memory task as it's using a smaller mcu than 328p for instance (i don't remember if attiny85 implementation has already been released).

[alowhum]

Cool! I'll try that with the one I have already. In my sketches I try to make a non-sleep option, so the lack of sleep should not be a problem. Heh, funny sentence.

Will I also need to install the STM32 library?

[scalz]

@alowhum
this is starting to be a problem for me..the lack of sleep

yes, i think you need to follow the howto you linked (for installing the core files)

[VaZso]

@gohan Regarding of battery powered system...

From STM32CubeMX power consumption calculator, it has the following current requirements:

In RUN mode:

• at 72MHz bus frequency, it needs 27 mA
• at 16MHz and HSI PLL, it needs 6.8 mA
• at 8 MHz and HSI, it needs 4 mA
• at 1 MHz and HSI, it needs 900 μA
• at 125 kHz and HSI, it needs 480 μA

---

In STANDBY mode with all clocks off, it needs 2 μA

---

In SLEEP mode:

• at 125 kHz bus frequency and HSI, it needs 410 μA
• at 1 MHz bus freq. and HSI, it needs 440 uA
• at 8 MHz, it needs 600 μA

---

Enabling the following peripherals, additional consumptions are (as for example):

• GPIOA needs 833.75 nA
• GPIOD needs 816.25 nA
• I2C needs 1.25 μA
• SPI1 needs 590 nA
• TIMER1 needs 2.92 μA
• TIMER2 needs 4.06 μA
• TIMER4 needs 3.99 μA
• USART1 needs 1.49 μA
• USART3 needs 1.53 μA
• USB needs 2.22 μA
• Window watchdog needs 312.5 nA
• Independent watchdog needs 1.71 μA
• ADC1 needs 162.19 μA

These are just some examples, not all possibilities and frequencies are listed here...

There are also lower power STM32 series anyway.

[gohan]

I'm curious because I saw these boards few months ago but I figured that community support was still in the early stages so I kind of didn't pay much attention to them and I preferred old but tested technology

[alowhum]

The patch has just been added to the Mysensors Development branch, so it's easier to try out.

I've created a guide on how to get started on the SMT32Duino forum.

[alowhum]

Heh, the STM32 doesn't have a digital pin 2 it seems. Where is the NRF supposed to connect to instead?

[mfalkvidd]

@alowhum looks like PA3: https://github.com/mysensors/MySensors/pull/795/commits/ac432acca3d7c58eb7c8f569dc562860605ea09f#diff-58c572256858a37808c4ebd0922b4060R50

[alowhum]

That's odd. I thought I had it just figured out. I'm about to test this at the top of a sketch:

#define MY_RF24_CE_PIN PB0
#define MY_RF24_CS_PIN PA4
#define MY_RF24_MOSI_PIN PA7
#define MY_RF24_MISO_PIN PA6
#define MY_RF24_SCK_PIN PA5
#define MY_RF24_IRQ_PIN PB10

The fun thing is all the pins are almost in a row. Almost. And if the IRQ is A3, then one more pin would line up..

According to this image the IRQ is pin PB10 though:
http://wiki.stm32duino.com/images/a/ae/Bluepillpinout.gif

[mfalkvidd]

@alowhum sorry I misread your question. Don't know why, but I didn't see that you were talking about the NRF.

IRQ is not used for the NRF on Arduino, so I supposed it is not used for STM32 either. There is nothing about IRQ in https://github.com/mysensors/MySensors/pull/795/commits/ac432acca3d7c58eb7c8f569dc562860605ea09f#diff-cf14b6301beb3a4dbaded9b95bb190feR487

[alowhum]

Really? On the Arduino nano I'm always connecting it to pin 2. It says to do so in the guide?

Anyway, I haven't been able to get it to work. Perhaps some of the developers van shed some light on how it's supposed to work?

[tbowmo]

@alowhum

Its first in recent (develop branch?) that interrupt usage with nRF24L01 have been enabled, and only in certain scenarios.

[tekka]

@alowhum The MySensors RF24 driver is a polling driver (unless RX queuing is enabled), hence no IRQ required.

I've successfully tested the RF24 radio with this wiring on a BluePill board using MySensors 2.2.0-beta:

CLK -> PA5
MISO -> PA6
MOSI ->PA7
CSN -> PA4
CE -> PB0

do not forget to set:

#define MY_RF24_CE_PIN PB0

[alowhum]

Hmm, that's pretty much what I had.

Could you perhaps share your example sketch?

// It's working now! Turns out I had to set the radio to low power..

[mfalkvidd]

@alowhum said in STM32?:

Really? On the Arduino nano I'm always connecting it to pin 2. It says to do so in the guide?

Well the guide also says "The IRQ is currently not used by the MySensors library so it can be left un-connected."

[tekka]

@alowhum Perfect!

[PhracturedBlue]

FYI, I didn't check the work done by tekka, but I didn't file a pull request for my 'sleep' code. I have support for using low power mode (reduce current from ~40mA to 4mA during sleep) but I had issues with reliable wakeup, so I've just switched my code to all using delay loops.

Initially I was using these boards for my sensors, but there is very little benefit compared to a 3.,3V pro-mini for my usage cases, and the power is 10x more when running (and 100x more when idle without my sleep patches that don't work)

I don't have any sensors that need the extra horsepower of the STM32 personally. The one benefit I did realize is having a USB serial port which removes the need for USB->TTL.

[freynder]

Exactly what I was looking for, thank you!

I can't seem to get it to work though. I'll report my findings here in case it helps:

Platforms tested: platformio and arduino ide, I mainly use platformio
Hardware: blue pill with RFM69HW connected like this:
NSS <-> PA4
MOSI <-> PA7
MISO <-> PA6
SCK <-> PA5
DIO0 <-> PA3

Issues encountered:

1. undeclared values while compiling. I used the following workaround:

// Workaround for STM32 support
#define ADC_CR2_TSVREFE  (1 << 23) // from libopencm3
#define digitalPinToInterrupt(x) (x)

1. examples/SecurityPersonalizer does not seem to work. I use it to write the AES encryption key to EEPROM. However, I do not see any output when running the sketch. As a workaround I created a minimal sketch to write the key to EEPROM which seemed to work.
   Update: Looks like I was using an old sketch. Works correctly with updated sketch.

2. stm32 sensor is unable to connect to gateway:

22898 TSM:FAIL:RE-INIT
22898 TSM:INIT
22900 TSM:INIT:TSP OK
22901 TSM:FPAR
24120 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
26121 !TSM:FPAR:NO REPLY

[freynder]

@freynder said in STM32?:

stm32 sensor is unable to connect to gateway:

After further testing, this seems to work now. I'm not exactly sure why unfortunately. I'm now using the new RFM69 library. I noticed that communication seems to fail after uploading the sketch over stlink, even when clicking the reset button. When disconnecting/reconnecting the usb power all works well. Maybe that was the issue previously as well.

[freynder]

@PhracturedBlue What hardware were you using? Did it include a power led and voltage regulator? According to http://www.stm32duino.com/viewtopic.php?f=3&t=658&start=40 it should be possible to put the Blue Pill in stop mode using 13µA while sleeping when eliminating these.

I'm also interested in using the blue pill for the included RTC to periodically send data (RSSI, battery level, etc). I understand that with the current MySensors API this is not supported. E.g. combining a 24 hour sleep with a light switch: when the light switch is triggered, the 24 hour sleep is interrupted and starts again from scratch, so it is impossible to combine external interrupts with time interrupts, unless I am missing something. I am hoping RTC alarms could provide a solution here.

[gohan]

@tekka do you think stm32 is sufficiently stable running mysensors or should I stick to the "old" pro mini for battery powered sensors? (Also considering the ota updates support)

[freynder]

@gohan There is no support yet for sleep, so battery powered out of the box will not work. I've been testing custom sleep function (STOP mode, external interrupts) and so far was able to run a blue pill + RFM69 with MySensors between 0.01 and 0.20 mA (inconsistent results, not sure yet why). A sketch with just blue pill ran consistently at 0.01 mA. Unfortunately my multimeter does not allow more accurate measurements.

[tekka]

@gohan As @freynder pointed out, sleeping and low power modes are currently not implemented - if you do not need the higher speed & additional features that come along with the stm32 I'd stick (for the moment) to at328p for battery-powered sensors.

[alowhum]

I thought I'd just share a complete sketch. This is a sketch for a Co2 and dust sensor using the STM32 blue pill.

/*
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 *  DESCRIPTION
 *
 *  MH-Z19 CO2 sensor
 *  Uses infrared to measure Co2' absorbtion spectrum. Talks to the board over over serial 9600 on Serial1.
 *  
 *  PMS-7003
 *  This sensor uses a frickin' laser to measure lots of different fine dust levels, between 0.3 and 10 microns. 
 *  It can output the raw particle count for a certain particle size and up. Or it can give the official um/mg 
 *  measurement. Talks to the board over over serial 9600 on Serial2.
 *  
 *  
 *  NRF24 pins: b0 a7 a6 a5 a4 (and 3.3v power)
 *  MH-Z19 pins: a9 a1 (and 5v power)
 *  PMS7001 pins: a2 a3 (and 5v power)
 */



/* 
//------------------------------------------------------------------------------
//  PM sensor PMS7003 (fine dust)




Copyright 2017 Scapeler

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.    

*/

//------------------------------------------------------------------------------

// if you uncomment this, you can get test and debug updates about the sensor' wireless connection by using the serial monitor tool.
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24                            // A 2.4Ghz transmitter and receiver, often used with MySensors.
#define MY_RF24_PA_LEVEL RF24_PA_MIN              // This sets a low-power mode for the radio. Useful if you use the verison with the bigger antenna, but don't want to power that from a separate power source. It can also fix problems with fake Chinese versions of the radio.
// #define MY_RADIO_RFM69                         // 433Mhz transmitter and reveiver.

// This is needed if you use an STM32 board:
#define MY_RF24_CE_PIN PB0

// Choose if you want this sensor to also be a repeater.
// #define MY_REPEATER_FEATURE                    // Just remove the two slashes at the beginning of this line to also enable this sensor to act as a repeater for other sensors. If this node is on battery power, you probably shouldn't enable this.

// Are you using this sensor on battery power?
// #define BATTERY_POWERED                        // Just remove the two slashes at the beginning of this line if your node is battery powered. It will then go into deep sleep as much as possible. While it's sleeping it can't work as a repeater!

#include <SPI.h>
#include <MySensors.h>

// Co2 sensor
#define CHILD_ID_CO2 0 // The Co2 sensor

// Dust sensor
#define CHILD_ID_DUST_PM03 1
//#define CHILD_ID_DUST_PM05 2
#define CHILD_ID_DUST_PM10 2 
#define CHILD_ID_DUST_PM25 3
#define CHILD_ID_DUST_PM50 4
#define CHILD_ID_DUST_PM100 5

// bool receivedConfig = false;                      // This is not used in the code, but perhaps MySensors requires this?
// bool metric = true;                               // Variable that stores if the sensor will output the temperature in Fahrenheit of Celsius. The gateway sends this preference to the node.


// Mysensors settings

// Co2
MyMessage msgCo2(CHILD_ID_CO2, V_LEVEL);
MyMessage msgCo2b(CHILD_ID_CO2, V_UNIT_PREFIX);

// Dust. If you want to get all the raw data, the commented lines are useful.
MyMessage msgDust03(CHILD_ID_DUST_PM03, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
MyMessage msgDust03b(CHILD_ID_DUST_PM03, V_UNIT_PREFIX);
//MyMessage msgDust05(CHILD_ID_DUST_PM05, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
//MyMessage msgDust05b(CHILD_ID_DUST_PM05, V_UNIT_PREFIX);
MyMessage msgDust10(CHILD_ID_DUST_PM10, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
MyMessage msgDust10b(CHILD_ID_DUST_PM10, V_UNIT_PREFIX);
MyMessage msgDust25(CHILD_ID_DUST_PM25, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
MyMessage msgDust25b(CHILD_ID_DUST_PM25, V_UNIT_PREFIX);
MyMessage msgDust50(CHILD_ID_DUST_PM50, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
MyMessage msgDust50b(CHILD_ID_DUST_PM50, V_UNIT_PREFIX);
MyMessage msgDust100(CHILD_ID_DUST_PM100, V_LEVEL); // Sets up the message format that we'l be sending to the MySensors gateway later.
MyMessage msgDust100b(CHILD_ID_DUST_PM100, V_UNIT_PREFIX);



// These defines and variables can be changed:

// co2
unsigned long co2MeasurementInterval = 30000;        // Time to wait between reads (in milliseconds).
//float co2threshold = 0.1;   // How big a measurement difference has to be before an update is sent. Makes the sensor less precise, but also less jittery, and can save battery.

// dust
// Are you using this sensor on battery power?
// #define BATTERY_POWERED                        // Just remove the two slashes at the beginning of this line if your node is battery powered. It will then go into deep sleep as much as possible. While it's sleeping it can't work as a repeater!

int dustSlowDown = 20; // The dust sensor is internally checked approximately every 700 or 800 milliseconds. Once in how many loops should it send the data?

unsigned long dustMeasurementInterval = 700;  // This is a fickle thing. Changing it can give more time-outs.

// PROBABLE BEST NOT TO CHANGE THESE VARIABLES
// PMS7003 sensor - input byte variables
int inputHigh = 0;
int inputLow = 0;
// variable to caclulate checksum input variables
uint16_t inputChecksum = 0;
// sensor variables
uint16_t concPM1_0_CF1;
uint16_t concPM2_5_CF1;
uint16_t concPM10_0_CF1;
uint16_t concPM1_0_amb;
uint16_t concPM2_5_amb;
uint16_t concPM10_0_amb;
uint16_t rawGt0_3um;
uint16_t rawGt0_5um;
uint16_t rawGt1_0um;
uint16_t rawGt2_5um;
uint16_t rawGt5_0um;
uint16_t rawGt10_0um;
uint8_t  version;
uint8_t  errorCode;
uint16_t checksum;
int dustSlowDownCounter = 0;


void presentation()
{
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("AIQ Sensor CO2 MH-Z19 and Dust PMS-7003", "1.0");

  // Register all sensors to gateway (they will be created as child devices):

  // co2
  present(CHILD_ID_CO2, S_AIR_QUALITY);
  send(msgCo2b.set("ppm"));

  // dust
  //present(CHILD_ID_DUST_PM10, S_DUST);
  //send(msgPM10.set("ppm"));
  present(CHILD_ID_DUST_PM03, S_DUST);
  send(msgDust03b.set("um/m3"));    
  //present(CHILD_ID_DUST_PM05, S_DUST);
  //send(msgDust05b.set("pp/dl"));    
  present(CHILD_ID_DUST_PM10, S_DUST);
  send(msgDust10b.set("um/m3"));  
  present(CHILD_ID_DUST_PM25, S_DUST);
  send(msgDust25b.set("um/m3")); 
  present(CHILD_ID_DUST_PM100, S_DUST);
  send(msgDust100b.set("um/m3"));  
  present(CHILD_ID_DUST_PM50, S_DUST);
  send(msgDust50b.set("pp/dl"));   
}


void setup() {
     delay(1000);
   Serial.begin(115200);
     delay(1000);
   Serial1.begin(9600);       //C02 sensor read serial
       while (!Serial1) {
    }

    Serial2.begin(9600); // PMS7003 dust sensor read serial
      while (!Serial2) {
    }
        
   delay(2000);
   while (Serial1.read()!=-1) {};  //clear Co2 buffer.
   Serial.println("hello world, I am a sensor.");
}


void loop() {

   // You should not change these variables:
   static unsigned long previousCo2Millis = 0;       // Used to remember the time of the last temperature measurement.
   static unsigned long previousDustMillis = 0;       // Used to remember the time of the last temperature measurement.

   unsigned long currentMillis = millis(); // The time since the sensor started, counted in milliseconds. This script tries to avoid using the Sleep function, so that it could at the same time be a MySensors repeater.

  // Co2 loop
  if (currentMillis - previousCo2Millis >= co2MeasurementInterval) {
    Serial.println("");
    Serial.println("CO2 - Sending data request to sensor.");
    previousCo2Millis = currentMillis;

    long co2ppm = readCO2();

    Serial.println("Co2 - PPM = " + String(co2ppm));
    send(msgCo2.set((long)ceil(co2ppm))); 
    Serial.print("Co2 - zzzzZZZZzzzzZZZZzzzz\n");
  }

  // The dust sensor sends its data continuously, so let's get that data.
  int dustSensorOutput = pms7003ReadData();
}


// MAIN FUNCTION THAT GETS THE Co2 DATA
int readCO2()
{
  while (Serial1.read()!=-1) {};  //clear buffer  

  char response[9]; // for answer
  byte cmd[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
  
  // command to ask for data
  Serial1.write(cmd, 9); //request PPM CO2 

  Serial1.readBytes(response, 9);

    Serial.print(response[0], HEX);   
    Serial.print(" - ");   
    Serial.print(response[1], HEX);   
    Serial.print(" - ");    
    Serial.print(response[2], HEX);   
    Serial.print(" - ");          
    Serial.print(response[3], HEX);   
    Serial.print(" - ");          
    Serial.print(response[4], HEX);   
    Serial.print(" - ");          
    Serial.print(response[5], HEX);   
    Serial.print(" - ");        
    Serial.print(response[6], HEX);   
    Serial.print(" - ");   
    Serial.print(response[7], HEX);   
    Serial.print(" - ");      
    Serial.print(response[8], HEX); 
    Serial.println(" - END");  

  if (response[0] != 0xFF)
  {
    Serial.println("Wrong starting byte from co2 sensor!");
    return -1;
  }

  if (response[1] != 0x86)
  {
    Serial.println("Wrong command from co2 sensor!");
    return -1;
  }

  int responseHigh = (int) response[2];
  int responseLow = (int) response[3];
  int ppm = (256 * responseHigh) + responseLow;
  
  return ppm;
}


// MAIN FUNCTION FOR THE DUST SENSOR, Thanks to Scapeler.nl
int pms7003ReadData() {
    
  // while (Serial2.read()!=-1) {};  //clear buffer

  if (Serial2.available() < 32) {
    if (Serial2.available() == 0) {
      delay(150);
      return -1;
    };
    if (Serial2.available() > 16) {
      delay(10);
      return -1;
    };
    if (Serial2.available() > 0) {
      delay(30);
      return -1;
    };
    delay(100);
    return -1;
  }
  if (Serial2.read() != 0x42) return -1;
  if (Serial2.read() != 0x4D) return -1;

  inputChecksum = 0x42 + 0x4D;

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  if (inputHigh != 0x00) return -1; 
  if (inputLow != 0x1c) return -1;    

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM1_0_CF1 = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM2_5_CF1 = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM10_0_CF1 = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM1_0_amb = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM2_5_amb = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  concPM10_0_amb = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt0_3um = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt0_5um = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt1_0um = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt2_5um = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt5_0um = inputLow+(inputHigh<<8);

  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  inputChecksum += inputHigh + inputLow;
  rawGt10_0um = inputLow+(inputHigh<<8);

  inputLow = Serial2.read();
  inputChecksum += inputLow;
  version = inputLow;

  inputLow = Serial2.read();
  inputChecksum += inputLow;
  errorCode = inputLow;

  Serial.print("PMS7003;"); 

  // The measurement recalculated to micrograms per cubic meter, a common standard.
  Serial.print(concPM1_0_CF1);
  Serial.print(';'); 
  Serial.print(concPM2_5_CF1);
  Serial.print(';'); 
  Serial.print(concPM10_0_CF1);
  Serial.print(';'); 

  // The measurement recalculated to micrograms per cubic meter, a common standard. Not quite sure what the difference is..
  Serial.print(concPM1_0_amb);
  Serial.print(';'); 
  Serial.print(concPM2_5_amb);
  Serial.print(';');     
  Serial.print(concPM10_0_amb);
  Serial.print(';');     

  // this is the 'raw' data that the sensor gathers internally, before it calculates the above values.
  Serial.print(rawGt0_3um); // This indicates total number or particles in 0.1 liter of air that have a diameter above 0.3um. This will be the biggest number, as it measures the most particles. But it's very imprecise: 50% accuracy..
  Serial.print(';');
  Serial.print(rawGt0_5um); // This indicates the total number or particles in 0.1 liter of air that have a diameter above 0.5um (so it will be a smaller count than the line above)
  Serial.print(';'); 
  Serial.print(rawGt1_0um); // This indicates the total number or particles in 0.1 liter of air that have a diameter above 1 micron. And so on..
  Serial.print(';'); 
  Serial.print(rawGt2_5um);
  Serial.print(';'); 
  Serial.print(rawGt5_0um); // Acording to the datashet, at this point the accuracy has reached at 98%.
  Serial.print(';'); 
  Serial.print(rawGt10_0um);
  Serial.print(';'); 
  Serial.print(version);
  Serial.print(';'); 
  Serial.print(errorCode);
  Serial.println("---");
  
  inputHigh = Serial2.read();
  inputLow = Serial2.read();
  checksum = inputLow+(inputHigh<<8);
  if (checksum != inputChecksum) {
    Serial.print(';'); 
    Serial.print(checksum); 
    Serial.print(';'); 
    Serial.print(inputChecksum); 
  }
  //Serial.print('\n');

  // let's send a message with the results
  dustSlowDownCounter = dustSlowDownCounter + 1;
  if(dustSlowDownCounter > dustSlowDown){
    
    /*  MEASUREMENT  */
    if(rawGt1_0um > 0){
      Serial.println(" Dust1_0 = " + String(concPM1_0_CF1));
      send(msgDust10.set(concPM1_0_CF1,1));
    }         
    if(rawGt2_5um > 0){
      Serial.println(" Dust1_0 = " + String(concPM2_5_CF1));
      send(msgDust25.set(concPM2_5_CF1,1));
    }     
    if(rawGt10_0um > 0){
      Serial.println(" Dust1_0 = " + String(concPM10_0_CF1));
      send(msgDust100.set(concPM10_0_CF1,1));
    }     

    /*  RAW DATA  */            
    
    if(rawGt0_3um > 0){
      Serial.println(" Dust03 = " + String(rawGt0_3um));
      send(msgDust03.set(rawGt0_3um,1));
    }/*
    if(rawGt0_5um > 0){
      Serial.println(" Dust05 = " + String(rawGt0_5um));
      send(msgDust05.set(rawGt0_5um,1));
    }
    if(rawGt1_0um > 0){
      Serial.println(" Dust10 = " + String(rawGt1_0um));
      send(msgDust10.set(rawGt1_0um,1));
    }
    if(rawGt2_5um > 0){
      Serial.println(" Dust25 = " + String(rawGt2_5um));
      send(msgDust25.set(rawGt2_5um,1));
    }
    */
    if(rawGt5_0um > 0){
      Serial.println(" Dust50 = " + String(rawGt5_0um));
      send(msgDust50.set(rawGt5_0um,1));
    }      
    /*
    if(rawGt10_0um > 0){
      Serial.println(" Dust100 = " + String(rawGt10_0um));
      send(msgDust100.set(rawGt10_0um,1));
    }   
    */

    dustSlowDownCounter = 0;
  } // End of sensing message.

  delay(700);  // Data will come between 200 and 800 miliseconds. If you set this be be higher than 700 you will get checksum errors.
    
  return concPM2_5_CF1;
}

[gohan]

@alowhum do you mind posting the links to the sensors you used? I was planning to make a similar one

[freynder]

I just finished my first low power test implementation for STM32: a low power dual button sensor using RFM69 and external interrupts. It seems to work very well so far. My multimeter shows 0.01 mA sleep current, but I'm not sure how well this can be trusted.

The sketch can be found here: https://github.com/freynder/LowPowerButtons
It uses platformio IDE directory structure.

The modifications to MySensors (not complete/nicely implemented yet) can be found here: https://github.com/freynder/MySensors/tree/stm32f1_sleep
I hope to find time in the near future to clean it up + implement support for interrupts and contribute it to the project if not already available by then.

[alowhum]

@freynder awesome! I hope you find the time.
@gohan: just search for the sensors on Aliexpress, and then select "sort by: orders" to get get the most popular shops.

[RAD-X]

Nice work guys! STM32 is good for bigger projects, even consumption looks fine.
How is solved missing on-chip eeprom?

[SabineT]

When saying STM32 you have to specify which one you mean. The STM32L0 Series series has 2kB EEPROM on board.

[SabineT]

BTW: for battery powered nodes the STM32L0 series is the better solution (L means ultra-low-power)!

[Uhrheber]

How many STM32L0 boards < €2 are there?

[mfalkvidd]

@Uhrheber more than 60,000 in stock here, but if you want to purchase a complete board you will have to pay more.

[Uhrheber]

I said boards, not chips. Chips I can get a dime a dozen.
And as there aren't any cheap STM32L0 boards now, most people will stay with the blue pill.

[mfalkvidd]

@Uhrheber yep

[Nca78]

And neither is there an arduino core available for those chips, they use and m0 core and not m3 like in the F103 versions.

[Uhrheber]

@Nca78 The Arduino Zero is also an M0, so this shouldn't be too complicated.
Peripherals are completely different, though.

[Nca78]

@Uhrheber said in STM32?:

@Nca78 The Arduino Zero is also an M0, so this shouldn't be too complicated.
Peripherals are completely different, though.

Yes and NRF51822 is too and the core is based on SAMD core which is from the Zero.
But it's still a lot of work to adapt it first for Arduino and then add support in MySensors, when an NRF52832 already has a core, support in MySensors and is available at a similar price but with better performance (Cortex M4 with FPU) and includes the radio.
And now there's an Arduino using nrf52832 (Primo), I'm pretty sure we will "soon" find some nrf52832 boards on AliExpress at a reasonable price.

[Uhrheber]

How does the NRF52832 fare, compared to a classical solution using Arduino Nano and nRF24?
Is it usable for a sleeping node with a (window) switch, or a remote environmental sensor, when it comes to range and power consumption?
Is the software already stable enough?

[Nca78]

@Uhrheber see this thread
https://forum.mysensors.org/topic/6961/nrf5-bluetooth-action/805

There's still progress to make but it works, and with DCDC enabled power consumption is much lower than on nrf24.

[ooznerol]

Hi all,
I successfully compiling and flashing my STM32 blue pill, but don't know where is the Serial output?
Do you use SWO or physical UART? if UART on which one?

Thanks a lot for this great work

[ooznerol]

Hi all, Can somebody help me please?

I add also some STM32 blue pill and try to run mysensors on them.
I use the devlopment branch. Compilation is OK and I successfully flash it on my board with STLink.
But I don't see any message/log. I am not sure that the software is runnning.
How can I debug that?

thansk

[gohan]

I guess you are one of the very few using the STM32 at the moment.

[freynder]

@ooznerol : it's been a while but I've had some issues with this as well. Here are some pointers that may help you:

If I remember correctly, it depends on the upload method which may set particular build flags. In my platformio configuration for example, I'm setting the following build flags:
build_flags = -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER when using the stlink upload method. CONFIG_MAPLE_MINI_NO_DISABLE_DEBUG was necessary to preserve the SWD pins and SERIAL_USB creates a virtual UART for serial output to the USB port. If Serial_USB is not set then the hardware serial is being used. Which one? According to https://github.com/rogerclarkmelbourne/STM32duino-bootloader/issues/8 it depends on the fact that you are using a bootloader or not, so serial1 (PA9/PA10) or serial2 (PA2/PA3).

Also, if you experience issues with the USB connection, check the pullup resistor on D+ as indicated in http://wiki.stm32duino.com/index.php?title=Blue_Pill .

I'm not sure what IDE/upload method/board library you are using. In any case, watching the output during upload to find out the build flags may be useful. If that does not help, then pls send me the details of your setup and I will try to test it myself.

[ooznerol]

Hi @freynder , and thanks for your help.

I use Arduino IDE with stm32duino library to compile and upload . I haven't change the bootloader.
This setup works without problem on my bluepill ( I had run several example without porblem, specialy to found which uart pin are used by stm32duino).

I had a STLink connected to my blue pin (JTAG Clk/Data and SWO (and GND of course)).

I have enable debug option : #define MY_DEBUG and #define MY_DEBUG_VERBOSE_RF24

Here is the output of my compilation/upload :

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\ooznerol\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\ooznerol\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\ooznerol\Documents\Arduino\libraries -fqbn=Arduino_STM32:STM32F1:genericSTM32F103C:device_variant=STM32F103C8,upload_method=STLinkMethod,cpu_speed=speed_72mhz,opt=osstd -ide-version=10803 -build-path C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727 -warnings=none -build-cache C:\Users\ooznerol\AppData\Local\Temp\arduino_cache_402979 -prefs=build.warn_data_percentage=75 -verbose C:\Users\ooznerol\Documents\Arduino\STM32Duino_MysensorsLightSensor\STM32Duino_MysensorsLightSensor.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\ooznerol\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -tools C:\Users\ooznerol\AppData\Local\Arduino15\packages -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\ooznerol\Documents\Arduino\libraries -fqbn=Arduino_STM32:STM32F1:genericSTM32F103C:device_variant=STM32F103C8,upload_method=STLinkMethod,cpu_speed=speed_72mhz,opt=osstd -ide-version=10803 -build-path C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727 -warnings=none -build-cache C:\Users\ooznerol\AppData\Local\Temp\arduino_cache_402979 -prefs=build.warn_data_percentage=75 -verbose C:\Users\ooznerol\Documents\Arduino\STM32Duino_MysensorsLightSensor\STM32Duino_MysensorsLightSensor.ino
Using board 'genericSTM32F103C' from platform in folder: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1
Using core 'maple' from platform in folder: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1
WARNING: Spurious .ci folder in 'MySensors' library
WARNING: Spurious .mystools folder in 'MySensors' library
WARNING: Spurious .mystools folder in 'MySensors' library
Detecting libraries used...
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11  -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -w -x c++ -E -CC -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "nul"
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11  -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -w -x c++ -E -CC -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "-IC:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "nul"
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11  -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -w -x c++ -E -CC -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "-IC:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "nul"
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11  -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -w -x c++ -E -CC -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "-IC:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\SPI\src" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "nul"
Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM\EEPROM.cpp
Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM\flash_stm32.c
Using cached library dependencies for file: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\SPI\src\SPI.cpp
Generating function prototypes...
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11  -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -w -x c++ -E -CC -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "-IC:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\SPI\src" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -c -g -Os -w -DDEBUG_LEVEL=DEBUG_NONE -std=gnu++11 -MMD -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_generic_stm32f103c -DVECT_TAB_ADDR=0x8000000 -DERROR_LED_PORT=GPIOB -DERROR_LED_PIN=1 -mcpu=cortex-m3 -DF_CPU=72000000L -DARDUINO=10803 -DARDUINO_GENERIC_STM32F103C -DARDUINO_ARCH_STM32F1  -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG=1 -DSERIAL_USB -DGENERIC_BOOTLOADER -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ -DMCU_STM32F103C8  -mthumb  -march=armv7-m -D__STM32F1__ "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/include" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/stm32f1/include"                                                           "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/stm32f1" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\system/libmaple/usb/usb_lib" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\cores\maple" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c" "-IC:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM" "-IC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\SPI\src" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp" -o "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp.o"
Compiling libraries...
Compiling library "MySensors-development"
Compiling library "EEPROM"
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\EEPROM\flash_stm32.c.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\EEPROM\EEPROM.cpp.o
Compiling library "SPI"
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\SPI\SPI.cpp.o
Compiling core...
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\start.S.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\start_c.c.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\syscalls.c.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\board.cpp.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\boards.cpp.o
Using previously compiled file: C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\boards_setup.cpp.o
Using precompiled core
Linking everything together...
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-g++" -Os -Wl,--gc-sections  -mcpu=cortex-m3 "-TC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c/ld/jtag_c8.ld" "-Wl,-Map,C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/STM32Duino_MysensorsLightSensor.ino.map" "-LC:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\variants\generic_stm32f103c/ld" -o "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/STM32Duino_MysensorsLightSensor.ino.elf" "-LC:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727" -lm -lgcc -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-section-align -Wl,--warn-unresolved-symbols -Wl,--start-group "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\sketch\STM32Duino_MysensorsLightSensor.ino.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\EEPROM\flash_stm32.c.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\EEPROM\EEPROM.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\libraries\SPI\SPI.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\start.S.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\start_c.c.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\syscalls.c.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\board.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\boards.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\core\wirish\boards_setup.cpp.o" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/..\arduino_cache_402979\core\core_Arduino_STM32_STM32F1_genericSTM32F103C_device_variant_STM32F103C8,upload_method_STLinkMethod,cpu_speed_speed_72mhz,opt_osstd_dd5e5f7edaf4f0539408738d9cfc05e4.a" -Wl,--end-group
"C:\Users\ooznerol\AppData\Local\Arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1/bin/arm-none-eabi-objcopy" -O binary  "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/STM32Duino_MysensorsLightSensor.ino.elf" "C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/STM32Duino_MysensorsLightSensor.ino.bin"
Multiple libraries were found for "MySensors.h"
 Used: C:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development
 Not used: C:\Users\ooznerol\Documents\Arduino\libraries\Mysensors-rfm69_update2
Using library MySensors-development at version 2.2.0-beta in folder: C:\Users\ooznerol\Documents\Arduino\libraries\MySensors-development 
Using library EEPROM in folder: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\EEPROM (legacy)
Using library SPI at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\Arduino_STM32\STM32F1\libraries\SPI 
Sketch uses 46576 bytes (71%) of program storage space. Maximum is 65536 bytes.
Global variables use 4432 bytes (21%) of dynamic memory, leaving 16048 bytes for local variables. Maximum is 20480 bytes.
C:\Program Files (x86)\Arduino\hardware\Arduino_STM32/tools/win/stlink_upload.bat COM8 {upload.altID} {upload.usbID} C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727/STM32Duino_MysensorsLightSensor.ino.bin 
STM32 ST-LINK CLI v2.1.0
STM32 ST-LINK Command Line Interface

ST-LINK SN : 49FF6E065178505040351687
ST-LINK Firmware version : V2J28S0
Connected via SWD.
SWD Frequency = 1800K.
Connection mode : Normal.
Device ID:0x446 
Device flash Size : 512 Kbytes
Device family :STM32F302xE/F303xE/F398xx

Loading file...
Flash Programming:
  File : C:\Users\ooznerol\AppData\Local\Temp\arduino_build_618727\STM32Duino_MysensorsLightSensor.ino.bin
  Address : 0x08000000
Flash memory programming...
±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±± 0%
 0%ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ 100%
Flash memory programmed in 2s and 995ms.
Programming Complete.

MCU Reset.

Application started.

thanks for your help

[freynder]

Hi @ooznerol ,

Your output shows build tag SERIAL_USB so I would assume Serial outputs to USB.

Did you connect the board using USB and try to read output from there? is USB recognized as a serial device? Is the pullup resistor on D+ correct (http://wiki.stm32duino.com/index.php?title=Blue_Pill)?

[freynder]

@ooznerol : when you say the examples ran without a problem, do you mean you had serial output from the examples but not from mysensors specifically?

[ooznerol]

HI @freynder ,

I just realize that when you speak about SERIAL_USB you really speak about.....Serial through USB connector .
I believe you speak about Virtual Com Port through USB in ST-LINK.

So I had change R10 on my blue pill and install maple driver.
Now I have a Maple Serial COM mounted when I connect my blue pill with the USB connector .

And......................TADA.................It is working. I had output on my terminal.

Thanks again

[ooznerol]

Hi it's me again...............
I have no problem with sensors sketch using RFM69.
But I have a strange problem with the serial gateway ino.
If I select the NRF24 radio (#define MY_RADIO_NRF24), I have some debug info on my terminal.
But If I select RFM69 (#define MY_RADIO_RFM69), I have nothing.

Is it normal?

Thanks

[gohan]

do you have #define MY_DEBUG enabled?

[ooznerol]

@gohan Yes of course

I only modified the radio

[gohan]

I have no idea then... I never used serial GW

[freynder]

Hi @ooznerol,

Glad serial output is working now. Unfortunately I have no experience with serial gateway either, sorry.

[ooznerol]

@freynder

Too bad...... Do you have any idea how we can debug this?

[freynder]

@ooznerol

In general: isolating the problem and then tracing through the code. I understand you already isolated the problem to the combination of serial gateway and RFM69. First make sure this actually the case by uploading a sketch again you knew was working before with RFM69 (to eliminate any hardware / wiring issues that may have happened between your tests). If you can confirm that, you can start by looking at the code and find what is specific for the combination of these specific directives.

[ooznerol]

@freynder

Instead facing through the code , I think about compile with a debugger (like IAR ou Keil for example). Do you think it is possible?

[freynder]

@ooznerol No experience with those I'm afraid. From my notes I see I did experiment with using GDB in combination with a Black Magic Probe (BMP) to debug the blue pill. You can probably convert your SWD adapter to a BMP device:
https://madnessinthedarkness.transsys.com/blog:2017:0122_black_magic_probe_bmp_on_st-link_v2_clones
https://github.com/blacksphere/blackmagic/wiki

[ooznerol]

Hi all, it's me again.

So finally Gateway is working fine. The problem was that the driver (specially on windows) seems little bit unstable (I must open the serial just after strating and close it after I finish my test).

So now I am playing with consumption.

I take the low power implementation from freynder and reach 860uA. This implemenation used STOP mode. If I change this to STANDBY mode I reach 4.1uA. But in this case when I wake up, the CPU react as it has been reseted and relaunch all mysensors init and presenation etc etc . So the trick will be to check the wake up reason, and in case of wake up from standby not relaunch mysensors init. Do you think it is possible inside mysensors architecture?

Thanks

[freynder]

@ooznerol I suppose you intend to run on battery? I desoldered the power led and voltage regulator on mine to reach 100uA (if readings were correct) using STOP mode. It ran on 2 AAA batteries for several months.

I'm unsure about using the STANDBY mode. Since RAM and registers contents are lost and pins are high impedance, full reinitialization seems necessary. Do you want to prevent the presentation communication specifically from happening? You can control that from your sketch directly in the presentation function I suppose...

[ooznerol]

@freynder Yes I have of course remove unless hardware. ( i can't reach 3.3uA with it). In STOP mode, we are suppose to reach around 20-30uA (from datasheet). I will try yo investigate

I can of course handle reset cause into presentation, but I don't know if other init are done inside mysensors architecture.
For STANDBY mode , we can save usefull data for mysensors into backup register. I had done something similar in the past but not in stm32duino environnement.

[Nca78]

@ooznerol said in STM32?:

I can of course handle reset cause into presentation, but I don't know if other init are done inside mysensors architecture.
For STANDBY mode , we can save usefull data for mysensors into backup register. I had done something similar in the past but not in stm32duino environnement.

Yes, before the presentation MySensors will initialize radio, check radio link/parent etc
There's no easy way to avoid it at the moment, but I think it should be a feature request, as we have the same situation with chips like NRF51/NRF52 which are also ARM based, if you want really low power consumption you need to go through a reset and MySensors initialization phase makes the wake up slow and power hungry.

[nagelc]

Just got a blue-pill, RFM69 node working. It was a bit of a learning curve moving from Atmega.

• Cheap J-Link: Never got it working. Cheap ST-Link: Worked
• Arduino (and VisualMicro) uploaded blink sketch with ST-Link: no problems
• Uploaded the USB bootloader using the ST-Link: no problems
• Took a while to figure out I didn't have the dfu driver loaded (Windows 10), but after that no problems using the usb
• MySensors security personalizer: no problems.
• Mock MySensors node: no problems. Talked to my gateway. Uses RFM69 encryption.

Seems like this is the Nano of the future, but without needing to level shift for 3.3V. I'm looking forward to making some real blue pill nodes and gateways.

[Brasletti]

Does anybody get the Serial Gateway with RS485 working? I can't get debug messages on serial console.

[NeverDie]

@alowhum You may want to consider the nRF5 series instead.

[Brasletti]

OK it is working with Hardware Serial. But still no debug message on startup. Maybe it's because the switching of the usb mode.

Is it possible to wait 2sec before starting up the gateway on stm32 boards?

[alowhum]

@neverdie Thanks! I ordered one, they look very interesting.

[freynder]

@freynder said in STM32?:

@freynder said in STM32?:

stm32 sensor is unable to connect to gateway:

After further testing, this seems to work now. I'm not exactly sure why unfortunately. I'm now using the new RFM69 library. I noticed that communication seems to fail after uploading the sketch over stlink, even when clicking the reset button. When disconnecting/reconnecting the usb power all works well. Maybe that was the issue previously as well.

Just following up on this as I finally found out why this is happening. I was using encryption and using serial upload (using stm32flash), the simulated eeprom would get overwritten by the flash erase. Not sure if this happens for dfu or stlink as well. Uploading using the black magic probe (which uses dbg) does not have this problem. I hope this may help someone struggling with the same issue.

Edit: not sure about dfu or stlink.

[nagelc]

Has anyone been able to do OTA programming with the STM32 yet?

[Dab0G]

@nagelc Yes I did. My bootloader - https://github.com/mysensors-rus/STM32_Mysensors_bootloader. My modified MySensors library - https://github.com/mysensors-rus/MySensors. Short description in Russian - https://mysensors-rus.github.io/STM32-OTA-MySensors

[nagelc]

@dab0g Wow! I did not expect anyone to answer. This is really great. I have a remote control lamp and a thermostat that use the STM32 and it would great to be able to program them OTA. I'll check it out.

[alowhum]

@nagelc said in STM32?:

@dab0g Wow! I did not expect anyone to answer. This is really great. I have a remote control lamp and a thermostat that use the STM32 and it would great to be able to program them OTA. I'll check it out.

If you do, be sure to create an English write-up for the rest of us!

[Dab0G]

My mini board.