RFM69 RSSI value report
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@scalz is doing some great work in this area so maybe he can let us know the status.
https://forum.mysensors.org/topic/5109/solved-rfm69-based-nodes-unable-to-report-lib-version/43 has some information.
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@mfalkvidd Thank you for pointing me to those resources, I finally got them working.
@scalz Absolutely awesome work :smile:Here's a full sketch example using the Si7021 Temp/RH sensor:
#define MY_NODE_ID 2 #define MY_DEBUG #define MY_RADIO_RFM69 #define MY_RFM69_FREQUENCY RFM69_433MHZ #define MY_IS_RFM69HW #define MY_RFM69_NETWORKID 100 #include <MySensors.h> #include <SPI.h> #include <Wire.h> #include "Adafruit_Si7021.h" unsigned long SLEEP_TIME = 1000; Adafruit_Si7021 sensor = Adafruit_Si7021(); MyMessage msgTemp(1, V_TEMP); MyMessage msgRh(2, V_HUM); MyMessage msgRSSI(3,V_VAR5); float temp; float rh; boolean requestACK = false; int16_t rssiVal char rssiStr[10]; void setup() { delay(100); sendSketchInfo("Temperature/RH Sensor N2 RFM69", "1.1"); sensor.begin(); present(1, S_TEMP); present(2, S_HUM); } void loop() { rssiVal = transportGetRSSI(); rh = sensor.readHumidity(); temp = sensor.readTemperature(); snprintf(rssiStr,10,"rssi: %d%",rssiVal); send(msgTemp.set(temp,2)); send(msgRh.set(rh,2)); send(msgRSSI.set(rssiStr)); sleep(SLEEP_TIME); }However, please note that this only works on:
https://github.com/scalz/Mysensors/tree/rfm69_update2
and
http://forum.mycontroller.org/topic/58/download-snapshot-build
Just drop a reply here and I will happily assist you using the above versions until they will be fully commited. -
@mfalkvidd Thank you for pointing me to those resources, I finally got them working.
@scalz Absolutely awesome work :smile:Here's a full sketch example using the Si7021 Temp/RH sensor:
#define MY_NODE_ID 2 #define MY_DEBUG #define MY_RADIO_RFM69 #define MY_RFM69_FREQUENCY RFM69_433MHZ #define MY_IS_RFM69HW #define MY_RFM69_NETWORKID 100 #include <MySensors.h> #include <SPI.h> #include <Wire.h> #include "Adafruit_Si7021.h" unsigned long SLEEP_TIME = 1000; Adafruit_Si7021 sensor = Adafruit_Si7021(); MyMessage msgTemp(1, V_TEMP); MyMessage msgRh(2, V_HUM); MyMessage msgRSSI(3,V_VAR5); float temp; float rh; boolean requestACK = false; int16_t rssiVal char rssiStr[10]; void setup() { delay(100); sendSketchInfo("Temperature/RH Sensor N2 RFM69", "1.1"); sensor.begin(); present(1, S_TEMP); present(2, S_HUM); } void loop() { rssiVal = transportGetRSSI(); rh = sensor.readHumidity(); temp = sensor.readTemperature(); snprintf(rssiStr,10,"rssi: %d%",rssiVal); send(msgTemp.set(temp,2)); send(msgRh.set(rh,2)); send(msgRSSI.set(rssiStr)); sleep(SLEEP_TIME); }However, please note that this only works on:
https://github.com/scalz/Mysensors/tree/rfm69_update2
and
http://forum.mycontroller.org/topic/58/download-snapshot-build
Just drop a reply here and I will happily assist you using the above versions until they will be fully commited. -
and Kudo to @tekka too ! and @marceloaqno who is also working on the linux part ;)
that said @mihai-aldea cool you have it working. of course we are interested by feedbacks :)
There are some defines which may need some adjustements (timeouts) depending on the clock of the mcu (especially for gw). for the moment the latest rev is still local but it does not differ a lot.Important note:
This new version breaks old packet structure. Because there are new values in the packet header : version, sequence number and Rssi.
Which means if people want to use these new features, it needs all nodes and GW updated.
As the next release isn't a major one, there will be a switch define, with these new features default disabled. for compatibility with older nodes. -
@rmtucker said:
Has Rssi been added to mysensors 2.1 ?
Yes. You can pull it using
transportGetRSSI(). From there on, use it just as it is or shape it more nicely with amap()function, it's up to you. But please note that 2.1.0 brings some slight changes so if your sketch throws some errors, just read them and change your sketch accordingly. Eg.#define MY_RF69_FREQUENCY RFM69_433MHZis replaced by#define MY_RFM69_FREQUENCY RFM69_433MHZ, notice the extra "M". -
Well, finally we have decided to wait for releasing the new rfm69 drivers.
Because- there was already so much changes/improvements in Mysensors to release.
- to keep a better history, and the new rfm69 driver has lot of improvements.
That said, for w5100 users, we have tested the new driver (not the one on my repo) and it works ok with w5100 and rfm69 in hardware spi mode, on same bus, without changing the w5100 lib.
So Mysensors 2.1 still use the old driver. The new rfm69 driver is planned for 2.2. No eta as far as i know, but with luck, let's see when it will release.
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@scalz Just to make it clear. The RFM69 RSSI value is not available in the official MySensors 2.1.0 release but it is available in your GitHub fork here: https://github.com/scalz/Mysensors/tree/rfm69_update2. Is that correct?
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Yes RSSI is a work in progress available in @scalz fork. We didn't have time to test it enough to include it in the 2.1 release.
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@hek I confirm that the RSSI support works perfect in scalz's fork.
@mihai.aldea it is not just about verifying RSSI. It is about verifying that the changes don't break anything else for existing users. Unfortunately, the new driver does break things and most users would dislike an upgrade that breaks their existing system.
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This is perfectly understandable but I merely wanted to give a raw input on the feature status.
I consider the RSSI values to be paramount when testing MySensors along with new hardware (antennas, wall penetration, registry tweaks etc.) as the simple online/offline node status would not help very much with these scenarios. That's why for the time being I will stick to scalz's rfm69_update2. -
@rmtucker In my RFM69 sensors using ver2.1 I'm doing as follows to check RSSI and, as well, how to check the background noise level. I have them implemented as two sensor values being reported every 5 minutes in the loop() to the gateway and controller.
void loop() { float humidity = dht.readHumidity(); // get dht22 humidity if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else { send(msgHum.set(humidity, 1)); // send dht22 humidity } float temperature = dht.readTemperature(); // get dht22 temperature if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT"); } else { send(msgTemp.set(temperature, 1)); // send dht22 temperature } digitalWrite(DHT22_PWR,LOW); // save some power. Turn off dht22 module. rssi = _radio.readRSSI(); // read RSSI in RFM69. Measure reception signal level from gw send(msgRSSI1.set(rssi)); // send RSSI, signal level to gateway wait(500); // wait to get idle rssi = _radio.readRSSI(); // read RSSI in RFM69. Measure background noise send(msgRSSI2.set(rssi)); // send RSSI, noise level to gateway sleep(SLEEP_TIME); // sleep a bit digitalWrite(DHT22_PWR,HIGH); // wake up dht22 module wait(2000); // warm up dht22 module }To get the RSSI value it's read in the sketch ( int rssi = _radio.readRSSI(); ) immediately after sending something, in this case the dht22 temperature. To check the background noise the RSSI level is read again 500ms after being kept idle (probably a shorter waiting period would work as well, but haven't studied it as it's not a critical issue for me). Normally the background noise-floor should be something around -95dBm and -115dBm. If you have some external interference, it could be easily detected with this method.
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@rmtucker In my RFM69 sensors using ver2.1 I'm doing as follows to check RSSI and, as well, how to check the background noise level. I have them implemented as two sensor values being reported every 5 minutes in the loop() to the gateway and controller.
void loop() { float humidity = dht.readHumidity(); // get dht22 humidity if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else { send(msgHum.set(humidity, 1)); // send dht22 humidity } float temperature = dht.readTemperature(); // get dht22 temperature if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT"); } else { send(msgTemp.set(temperature, 1)); // send dht22 temperature } digitalWrite(DHT22_PWR,LOW); // save some power. Turn off dht22 module. rssi = _radio.readRSSI(); // read RSSI in RFM69. Measure reception signal level from gw send(msgRSSI1.set(rssi)); // send RSSI, signal level to gateway wait(500); // wait to get idle rssi = _radio.readRSSI(); // read RSSI in RFM69. Measure background noise send(msgRSSI2.set(rssi)); // send RSSI, noise level to gateway sleep(SLEEP_TIME); // sleep a bit digitalWrite(DHT22_PWR,HIGH); // wake up dht22 module wait(2000); // warm up dht22 module }To get the RSSI value it's read in the sketch ( int rssi = _radio.readRSSI(); ) immediately after sending something, in this case the dht22 temperature. To check the background noise the RSSI level is read again 500ms after being kept idle (probably a shorter waiting period would work as well, but haven't studied it as it's not a critical issue for me). Normally the background noise-floor should be something around -95dBm and -115dBm. If you have some external interference, it could be easily detected with this method.
@jpaulin
Thank you so much for the info that rssi can be extracted in V2.1.0.
Would you be able to post your full sketch as it would be easier for me to extract the bits i need.?
I just can not understand why before your answer i was being told it is not possible in V2.1.0 to do this?
Or does this need another version of the Rfm69 library? -
@jpaulin
Thank you so much for the info that rssi can be extracted in V2.1.0.
Would you be able to post your full sketch as it would be easier for me to extract the bits i need.?
I just can not understand why before your answer i was being told it is not possible in V2.1.0 to do this?
Or does this need another version of the Rfm69 library?@rmtucker Here's the complete sketch. It's a DHT22 temp/humidity battery powered sensor node with an RFM69 radio.
/** * 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. * ******************************* * * REVISION HISTORY * Version 1.0 - Henrik EKblad * * DESCRIPTION * This sketch provides an example how to implement a humidity/temperature * sensor using DHT11/DHT-22 * http://www.mysensors.org/build/humidity */ // Enable debug prints #define MY_DEBUG // Enable and select radio type attached //#define MY_RADIO_NRF24 #define MY_RADIO_RFM69 #define MY_RFM69_FREQUENCY RF69_433MHZ #define MY_NODE_ID 13 // Identity for temp/hum sensor // Set blinking period #define MY_DEFAULT_LED_BLINK_PERIOD 50 // Flash leds on rx/tx/err //#define MY_DEFAULT_ERR_LED_PIN 7 // Error led pin red //#define MY_DEFAULT_RX_LED_PIN 6 // Receive led pin yellow #define MY_DEFAULT_TX_LED_PIN 9 // Transmit led pin green #define MY_WITH_LEDS_BLINKING_INVERSE const byte BATT_ADC = 1; // ADC Pin to measure battery level #include <MySensors.h> #include <DHT.h> unsigned long SLEEP_TIME = 300000; // Sleep time between reads (in milliseconds) #define CHILD_ID_HUM 0 #define CHILD_ID_TEMP 1 #define DHTPIN 18 // Input pin from DHT22 #define DHT22_PWR 6 // Vdc pin DHT22 to get it to sleep #define DHTTYPE DHT22 DHT dht(DHTPIN, DHTTYPE); #define CHILD_ID_RSSI_HIGH 7 // RSSI received signal level #define CHILD_ID_RSSI_LOW 8 // RSSI background noise level #define CHILD_ID_TEMP2 9 // internal temperature RFM69 chip int rssi; // RSSI RFM69 chip int temp2; // Internal temperature RFM69 chip int batteryLevel; // measured battery level int batteryPcnt; // measured battery level in percentage MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); MyMessage msgRSSI1(CHILD_ID_RSSI_HIGH, V_VAR1); MyMessage msgRSSI2(CHILD_ID_RSSI_LOW, V_VAR1); MyMessage msgTemp2(CHILD_ID_TEMP2, V_TEMP); void setup() { pinMode(DHT22_PWR,OUTPUT); digitalWrite(DHT22_PWR,HIGH); // power-on dht22 wait(2000); dht.begin(); // Start-up DHT22 sensor Temperature/Humidity } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Temp_Hum", "1.0"); // Register all sensors to gw (they will be created as child devices) present(CHILD_ID_HUM, S_HUM); present(CHILD_ID_TEMP, S_TEMP); present(CHILD_ID_RSSI_HIGH, S_CUSTOM); present(CHILD_ID_RSSI_LOW, S_CUSTOM); present(CHILD_ID_TEMP2, S_TEMP); } void loop() { float humidity = dht.readHumidity(); // get dht22 humidity if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else { send(msgHum.set(humidity, 1)); // send dht22 humidity wait(200); } float temperature = dht.readTemperature(); // get dht22 temperature if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT"); } else { send(msgTemp.set(temperature, 1)); // send dht22 temperature } digitalWrite(DHT22_PWR,LOW); // save some power rssi = _radio.readRSSI(); // read RSSI in RFM69. Measure reception signal from gw send(msgRSSI1.set(rssi)); // send RSSI level wait(500); // wait to get idle rssi = _radio.readRSSI(); // read RSSI in RFM69. Wait and measure background noise send(msgRSSI2.set(rssi)); // send RSSI level wait(200); // wait for next send temp2 = _radio.readTemperature(1); // read temperature in RFM69 send(msgTemp2.set(temp2)); // send temperature batteryLevel = analogRead(BATT_ADC); // (* 0.0032225806) batteryPcnt = batteryLevel / 10; // battery percentage sendBatteryLevel(batteryPcnt); // send battery level in percentage to controller // if (oldBatteryPcnt != batteryPcnt) { // use if not to send every cycle // sendBatteryLevel(batteryPcnt); // oldBatteryPcnt = batteryPcnt; // } sleep(SLEEP_TIME); // sleep a bit digitalWrite(DHT22_PWR,HIGH); // wake up DHT sensor wait(2000); // warm up DHT sensor } void receive(const MyMessage &message) { // We only expect one type of message from controller. But we better check anyway. Serial.println("something came in"); if (message.type==V_VAR1) { // reception to change SLEEP_TIME. SLEEP_TIME = message.getULong(); // send topic: eg. my_RFM69_gw1-in/3/1/1/0/24 30000 (payload in ms) } // MQTT_publish_topic_prefix/Node_Id/Sensor_Id/Cmd_Type/Ack_flag/type(V_VAR1=24) payload }readRSSI(); is an internal function in the RFM69.h / RFM69.cpp library that I'm calling in the sketch to get the RSSI and background noise level.
