💬 Temperature Sensor

Patrik Söderström

I use the following code, I have added the GW support for ESP board.

/**
 * 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
 *
 * Example sketch showing how to send in DS1820B OneWire temperature readings back to the controller
 * http://www.mysensors.org/build/temp
 */


// Enable debug prints to serial monitor
#define MY_DEBUG 

// Enable and select radio type attached
//#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

// Use a bit lower baudrate for serial prints on ESP8266 than default in MyConfig.h
#define MY_BAUD_RATE 9600
#define MY_GATEWAY_ESP8266

#define MY_ESP8266_SSID "TP54C10"
#define MY_ESP8266_PASSWORD "blarretp54c10"

// The port to keep open on node server mode
#define MY_PORT 5003

// How many clients should be able to connect to this gateway (default 1)
#define MY_GATEWAY_MAX_CLIENTS 2

#include <ESP8266WiFi.h>
#include <SPI.h>
#include <MySensors.h>  
#include <DallasTemperature.h>
#include <OneWire.h>

#define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No

#define ONE_WIRE_BUS 3 // Pin where dallase sensor is connected 
#define MAX_ATTACHED_DS18B20 16
unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 
float lastTemperature[MAX_ATTACHED_DS18B20];
int numSensors=0;
bool receivedConfig = false;
bool metric = true;
// Initialize temperature message
MyMessage msg(0,V_TEMP);

void before()
{
  // Startup up the OneWire library
  sensors.begin();
}

void setup()  
{ 
  // requestTemperatures() will not block current thread
  sensors.setWaitForConversion(false);
}

void presentation() {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Temperature Sensor", "1.1");

  // Fetch the number of attached temperature sensors  
  numSensors = sensors.getDeviceCount();

  // Present all sensors to controller
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
     present(i, S_TEMP);
  }
}

void loop()     
{     
  // Fetch temperatures from Dallas sensors
  sensors.requestTemperatures();

  // query conversion time and sleep until conversion completed
  int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
  // sleep() call can be replaced by wait() call if node need to process incoming messages (or if node is repeater)
  sleep(conversionTime);

  // Read temperatures and send them to controller 
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {

    // Fetch and round temperature to one decimal
    float temperature = static_cast<float>(static_cast<int>((getConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;

    // Only send data if temperature has changed and no error
    #if COMPARE_TEMP == 1
    if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
    #else
    if (temperature != -127.00 && temperature != 85.00) {
    #endif

      // Send in the new temperature
      send(msg.setSensor(i).set(temperature,1));
      // Save new temperatures for next compare
      lastTemperature[i]=temperature;
    }
  }
  sleep(SLEEP_TIME);
}

the exakt error I get in Arduino IDE is

In file included from C:\Users\xxxxx\Documents\Arduino\libraries\DallasTemperature/DallasTemperature.h:22:0,

                 from Z:\MySensors\NodeMCU-Water meter\NodeMCU-Water_meter\NodeMCU-Water_meter.ino:51:

C:\Users\xxxxxx\Documents\Arduino\libraries\OneWire/OneWire.h:108:2: error: #error "Please define I/O register types here"

 #error "Please define I/O register types here"

  ^

exit status 1
Error compiling for board NodeMCU 0.9 (ESP-12 Module).```

mfalkvidd

@Patrik-Söderström according to http://www.esp8266.com/viewtopic.php?f=12&t=9430 you need a newer version of the onewire library.

toddsantoro

Can anyone tell me what these errors say?

DallasTemperature.cpp:433: error: no 'int16_t DallasTemperature::calculateTemperature(const uint8_t*, uint8_t*)' member function declared in class 'DallasTemperature'
int16_t DallasTemperature::calculateTemperature(const uint8_t* deviceAddress, uint8_t* scratchPad){

sketch/DallasTemperature.cpp: In member function 'int16_t DallasTemperature::getTemp(const uint8_t*)':
DallasTemperature.cpp:484: error: 'calculateTemperature' was not declared in this scope
if (isConnected(deviceAddress, scratchPad)) return calculateTemperature(deviceAddress, scratchPad);

sketch/DallasTemperature.cpp: In member function 'bool DallasTemperature::hasAlarm(const uint8_t*)':
DallasTemperature.cpp:764: error: 'calculateTemperature' was not declared in this scope
char temp = calculateTemperature(deviceAddress, scratchPad) >> 7;

exit status 1
no 'int16_t DallasTemperature::calculateTemperature(const uint8_t*, uint8_t*)' member function declared in class 'DallasTemperature'

remis

@remis

I confirm that i can suppress the compilation error but nothing append on serial port...

Could somebody write here the typical serial port output with debug available?

This example is not working. What is the good solution to use this temperature sensor ?

thanks

Alex B Goode

Why don't we use an internal pull-up resistor available within an arduino board? Why additional external one?

pinMode(pin, INPUT); // set pin to input
digitalWrite(pin, HIGH); // turn on pullup resistors

mfalkvidd

@Alex-B-Goode the datasheet says "The 1-Wire bus requires an external pullup resistor of approximately 5kΩ"
The internal pull-up of most Arduinos are 20-50kΩ

So my guess is that the reason is that the person who created the instructions read the datasheet and chose to follow its recommendation. But accounding to http://electronics.stackexchange.com/a/62096/107155 the exact size might not be important, so it might be possible to use the internal pull up. Try it and let us know if it works.

toddsantoro

Does this example compile for anyone??? I get this error:

In file included from /Users/Documents/Arduino/tas_temp/tas_temp.ino:37:0:
/Users/Documents/Arduino/libraries/DallasTemperature/DallasTemperature.h: In function 'void loop()':
/Users/Documents/Arduino/libraries/DallasTemperature/DallasTemperature.h:252:13: error: 'int16_t DallasTemperature::millisToWaitForConversion(uint8_t)' is private
int16_t millisToWaitForConversion(uint8_t);

tas_temp:85: error: within this context
int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
^
exit status 1
within this context

mfalkvidd

@toddsantoro see post 2 and 3 in this thread or read the instructions on the build page, just under the "Example" heading.

mrwomble

@mfalkvidd said:

@toddsantoro see post 2 and 3 in this thread or read the instructions on the build page, just under the "Example" heading.

^ What he said 😁

toddsantoro

@mfalkvidd OK. I have it compiling and uploaded to the nano. My config file looks like this now:

sensor 6:
  -platform: onewire
    names:
      some_id: outside
      mount_dir: "/mnt/1wire"

I get an error when I restart HASS on the Pi.

ERROR (Thread-6) [homeassistant.components.sensor.onewire] No onewire sensor found. Check if dtoverlay=w1-gpio is in your /boot/config.txt. Check the mount_dir parameter if it's defined.

I guess my question is do I need to define the mount_dir variable and if so is the one I have correct? And if it is correct do I need to create that directory on my Pi?

I also do not get any output in the Arduino Serial Monitor window. Not sure if I even should...

Thanks in advance for any help...

mfalkvidd

@toddsantoro I am not familiar with homeassistant so I have no clue unfortunately.

About debug output on the serial monitor: Debug needs to be enabled first. See instructions at https://forum.mysensors.org/topic/666/debug-faq-and-how-ask-for-help and https://www.mysensors.org/build/debug

Debug output is often essential when troubleshooting.

toddsantoro

@mfalkvidd Thank you!!! I get this output in the serial monitor

TSM:INIT
TSM:RADIO:OK
TSP:ASSIGNID:OK (ID=2)
TSM:FPAR
TSP:MSG:SEND 2-2-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSM:FPAR
TSP:MSG:SEND 2-2-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=bc:
TSP:MSG:READ 0-0-2 s=255,c=3,t=8,pt=1,l=1,sg=0:0
TSP:MSG:FPAR RES (ID=0, dist=0)
TSP:MSG:PAR OK (ID=0, dist=1)
TSM:FPAR:OK
TSM:ID
TSM:CHKID:OK (ID=2)
TSM:UPL
TSP:PING:SEND (dest=0)
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=ok:1
TSP:MSG:READ 0-0-2 s=255,c=3,t=25,pt=1,l=1,sg=0:1
TSP:MSG:PONG RECV (hops=1)
TSP:CHKUPL:OK
TSM:UPL:OK
TSM:READY
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=ok:0100
TSP:MSG:SEND 2-2-0-0 s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=ok:2.0.0
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=ok:0
TSP:MSG:READ 0-0-2 s=255,c=3,t=6,pt=0,l=1,sg=0:I
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=11,pt=0,l=18,sg=0,ft=0,st=ok:Temperature Sensor
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=12,pt=0,l=3,sg=0,ft=0,st=ok:1.1
Request registration...
TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=ok:2
TSP:MSG:READ 0-0-2 s=255,c=3,t=27,pt=1,l=1,sg=0:1
Node registration=1
Init complete, id=2, parent=0, distance=1, registration=1

Does this look OK? If so I will ask my previous question on the Home Assistant forum. You have been a great help and once I get one of these things down I will be able to help others:)

mfalkvidd

@toddsantoro yes that looks good.

The "st=ok:xyz" means message xyz was acknowledged by the destination node (in your case by the gateway)

stingone

No compile error but i cant see anything on the serial monitor. also the temp sensor burend out with a 4k7 resistor :S

remis

@stingone
Hi. The same issue for me . I solve it with : 38400 bauds configuration serial port ( instead of 115200 default value)
and i lowering the RF power output with low_pa enable: it confirms that I have some issues with power suppply.

good luck

bentrik

It seems the DallasTempereture library is not a part of the default Library setup from Mysensors as of version 2.0? I tried to compile the above code, but I had to manually download DallasTemperature from GitHub first. Then OneWire was also missing. Adding these two libraries brought me a bit further, but I get a long list of errors connected to OneWire. What libraries should be used?

mfalkvidd

@bentrik the library is part of the MySensorsArduinoExamples, which can be downloaded at https://github.com/mysensors/MySensorsArduinoExamples/archive/master.zip

Sealander

Hi All, i'm also new here and into this. Like others i also ran into problems compiling this sketch, i tried al libraries mentioned in the posts in this thread, but no go. keep getting this error message:

In file included from C:\Users\Gebruiker\Desktop\My Sensors\MySensors-master\MySensorsArduinoExamples-master\examples\DallasTemperatureSensor\DallasTemperatureSensor.ino:37:0:

C:\Users\Gebruiker\Documents\Arduino\libraries\DallasTemperature/DallasTemperature.h: In function 'void loop()':

C:\Users\Gebruiker\Documents\Arduino\libraries\DallasTemperature/DallasTemperature.h:252:13: error: 'int16_t DallasTemperature::millisToWaitForConversion(uint8_t)' is private

 int16_t millisToWaitForConversion(uint8_t);
         ^

DallasTemperatureSensor:85: error: within this context

int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());

      exit status 1

within this context

Can someone help me with this problem? i have no clue at all and woud really like to build me a working sensor so i can hook it up to my Domoticz setup. thanks

hin this context

stingone

@Sealander

see solution above. Delete your dallas library and replace with the one above in the master zip file. That was the solution for me.

bentrik

@mfalkvidd Thanks for the feedback, It got me a bit further.
I have a fresh Windows Arduino 1.6.12 install, and I have download the MySensors Library 2.0 through the Library manager, and I've found MySensors.h and MyConfig.h under \Documents\Arduino\libraries\MySensors

I'm able to compile and upload the RelayActuator but quite a few of the library files seem to be missing in 2.0. DallasTemperature seem to be one of them.-But I struggled with DallasTemperature and some others.

I copied all the whole MySensors-1.5.4.zip library files to to C:\Program Files (x86)\Arduino\libraries, and I managed to compile, but I got an error message saying Invalid version found: 1.04
Then I tried to only copy the DallasTemperature and OneWire folder, and I had no errors.

-So I assume all library files the entire MySensors Examples catalouge are not ready in Libraries 2.0.

Anyways: The solution to get this sensor to work with Arduino 1.6.12, following the Download and API guide, adding MySensors 2.0 through the Library Manager, is to manually add:
\Arduino\libraries\DallasTemperature
\Arduino\libraries\OneWire\

-from https://github.com/mysensors/MySensorsArduinoExamples/archive/master.zip
-And not adding the whole structure.

Now I just have to find out how to make it speak to my serial gateway :satisfied:

💬 Temperature Sensor

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