2 or more DHT22 - Sensors on one Arduino pro mini
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I am a newbie with MySensors And Arduino, I'm looking for a sketch to put 2 or more DHT22 sensors on a pro mini that will run in 2.0. I have the pro mini running with one sensor and the DhtTemperatureAndHumiditySensor sketch. I have no idea where to begin. below is the Sketch
Thank you in advance Rick
/** * 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 * Version 1.1 - 2016-07-20: Converted to MySensors v2.0 and added various improvements - Torben Woltjen (mozzbozz) * * DESCRIPTION * This sketch provides an example of how to implement a humidity/temperature * sensor using a DHT11/DHT-22. * * For more information, please visit: * 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_RS485 #include <SPI.h> #include <MySensors.h> #include <DHT.h> // Set this to the pin you connected the DHT's data pin to #define DHT_DATA_PIN 3 // Set this offset if the sensor has a permanent small offset to the real temperatures #define SENSOR_TEMP_OFFSET 0 // Sleep time between sensor updates (in milliseconds) // Must be >1000ms for DHT22 and >2000ms for DHT11 static const uint64_t UPDATE_INTERVAL = 60000; // Force sending an update of the temperature after n sensor reads, so a controller showing the // timestamp of the last update doesn't show something like 3 hours in the unlikely case, that // the value didn't change since; // i.e. the sensor would force sending an update every UPDATE_INTERVAL*FORCE_UPDATE_N_READS [ms] static const uint8_t FORCE_UPDATE_N_READS = 10; #define CHILD_ID_HUM 0 #define CHILD_ID_TEMP 1 float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; bool metric = true; MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); DHT dht; void presentation() { // Send the sketch version information to the gateway sendSketchInfo("TemperatureAndHumidity", "1.1"); // Register all sensors to gw (they will be created as child devices) present(CHILD_ID_HUM, S_HUM); present(CHILD_ID_TEMP, S_TEMP); metric = getConfig().isMetric; } void setup() { dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) { Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!"); } // Sleep for the time of the minimum sampling period to give the sensor time to power up // (otherwise, timeout errors might occure for the first reading) sleep(dht.getMinimumSamplingPeriod()); } void loop() { // Force reading sensor, so it works also after sleep() dht.readSensor(true); // Get temperature from DHT library float temperature = dht.getTemperature(); if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT!"); } else if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) { // Only send temperature if it changed since the last measurement or if we didn't send an update for n times lastTemp = temperature; if (!metric) { temperature = dht.toFahrenheit(temperature); } // Reset no updates counter nNoUpdatesTemp = 0; temperature += SENSOR_TEMP_OFFSET; send(msgTemp.set(temperature, 1)); #ifdef MY_DEBUG Serial.print("T: "); Serial.println(temperature); #endif } else { // Increase no update counter if the temperature stayed the same nNoUpdatesTemp++; } // Get humidity from DHT library float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("H: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } // Sleep for a while to save energy sleep(UPDATE_INTERVAL); }
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I found this forum thread but it must be for a version prior to 2.0
link textcan this sketch be converted to 2.0?
#include <SPI.h> #include <MySensor.h> #include <DHT.h> #define NUM_SENSORS 2 unsigned long SLEEP_TIME = 3000UL; // Sleep time between reads (in milliseconds) MySensor gw; MyMessage tempMssg(0, V_TEMP); MyMessage humMssg(NUM_SENSORS, V_HUM); byte tempID[NUM_SENSORS] = {0,1}; byte humID[NUM_SENSORS] = {2,3}; DHT* dht[NUM_SENSORS]; byte sensorPin[NUM_SENSORS] = {3, 4}; float lastTemp[NUM_SENSORS] = {0.0, 0.0}; float lastHum[NUM_SENSORS] = {0.0, 0.0}; boolean metric = true; void setup() { Serial.begin(9600); gw.begin(); for (int i = 0; i < NUM_SENSORS; i++) { dht[i] = new DHT; dht[i]->setup(sensorPin[i]); } gw.sendSketchInfo("Humidity", "1.0"); for (int i = 0; i < NUM_SENSORS; i++) { gw.present(tempID[i], S_TEMP); gw.present(humID[i], S_HUM); } metric = gw.getConfig().isMetric; Serial.println(F("Setup Complete.")); } void loop() { for (int i = 0; i < NUM_SENSORS; i++) { delay(dht[i]->getMinimumSamplingPeriod()); float temperature = dht[i]->getTemperature(); if (isnan(temperature)) { Serial.print(F("Failed reading temperature from DHT")); Serial.println(i); } else if (temperature != lastTemp[i]) { lastTemp[i] = temperature; if (!metric) { temperature = dht[i]->toFahrenheit(temperature); } gw.send(tempMssg.setSensor(i).set(temperature, false)); // no ack Serial.print(F("T")); Serial.print(i); Serial.print(F("= ")); Serial.println(temperature); } float humidity = dht[i]->getHumidity(); if (isnan(humidity)) { Serial.print("Failed reading humidity from DHT"); Serial.println(i); } else if (humidity != lastHum[i]) { lastHum[i] = humidity; gw.send(humMssg.setSensor(i).set(humidity, false)); // no ack Serial.print(F("H")); Serial.print(i); Serial.print(F("= ")); Serial.println(humidity); } } gw.sleep(SLEEP_TIME); //sleep a bit }```
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Here are the instructions how to convert the sketch. Please try and if you run in to trouble please let me know and I will walk you through it.
Converting sketch from 1.5 to to 2.0
Add the following to activate NRF-radio support
#define MY_RADIO_NRF24
Remove MySensor constructor
MySensors gw;
Remove MySensors setup() call
gw.setup(....);
If node expects incoming messages, add the following function to handle data:
void receive(const MyMessage &msg) {}Move present() and sendSketchInfo() from setup() to a new function called presentation().
void presentation() { sendSketchInfo(...) present(...); }
If you’re using static ids , add:
#define MY_NODE_ID xx
If static parent node is used, add:
#define MY_PARENT_NODE_ID xx
If you want node to be a repeater, add
#define MY_REPEATER_FEATURE
If you need to reconfigure your CE/CS Pins (not needed if NRF is connected to default pins)
#define MY_RF24_CE_PIN 9 #define MY_RF24_CS_PIN 10
Remove all “gw.” before MySensors library calls.
If node requests time using requestTime(), remove callback argument define define the following function to handle time response:
void receiveTime(unsigned long ts) { }
Make sure to include MySensors.h after any configuration defines.
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@korttoma Thanks for the instructions. Can you check and see if I have missed anything in the code ?
#define MY_DEBUG #define MY_REPEATER_FEATURE #define MY_RADIO_NRF24 #include <SPI.h> #include <MySensors.h> #include <DHT.h> #define CHILD_ID_HUM1 1 #define CHILD_ID_TEMP1 2 #define HUMIDITY_SENSOR_1_DIGITAL_PIN 3 #define CHILD_ID_HUM2 3 #define CHILD_ID_TEMP2 4 #define HUMIDITY_SENSOR_2_DIGITAL_PIN 4 #define CHILD_ID_HUM3 5 #define CHILD_ID_TEMP3 6 #define HUMIDITY_SENSOR_3_DIGITAL_PIN 5 unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds) DHT dht1; DHT dht2; DHT dht3; float lastTemp1; float lastHum1; float lastTemp2; float lastHum2; float lastTemp3; float lastHum3; boolean metric = true; MyMessage msgHum1(CHILD_ID_HUM1, V_HUM); MyMessage msgTemp1(CHILD_ID_TEMP1, V_TEMP); MyMessage msgHum2(CHILD_ID_HUM2, V_HUM); MyMessage msgTemp2(CHILD_ID_TEMP2, V_TEMP); MyMessage msgHum3(CHILD_ID_HUM3, V_HUM); MyMessage msgTemp3(CHILD_ID_TEMP3, V_TEMP); void presentation() { // Send the Sketch Version Information to the Gateway sendSketchInfo("MultiDHT2", "1.0"); // Register all sensors to gw (they will be created as child devices) present(CHILD_ID_HUM1, S_HUM); wait( 55 ); present(CHILD_ID_TEMP1, S_TEMP); wait( 55 ); present(CHILD_ID_HUM2, S_HUM); wait( 55 ); present(CHILD_ID_TEMP2, S_TEMP); wait( 55 ); present(CHILD_ID_HUM3, S_HUM); wait( 55 ); present(CHILD_ID_TEMP3, S_TEMP); wait( 55 ); metric = getConfig().isMetric; } void setup() { dht1.setup(HUMIDITY_SENSOR_1_DIGITAL_PIN); dht2.setup(HUMIDITY_SENSOR_2_DIGITAL_PIN); dht3.setup(HUMIDITY_SENSOR_3_DIGITAL_PIN); } void loop() { delay(dht1.getMinimumSamplingPeriod()); float temperature1 = dht1.getTemperature(); if (isnan(temperature1)) { Serial.println("Failed reading temperature from DHT1"); } else if (temperature1 != lastTemp1) { lastTemp1 = temperature1; if (!metric) { temperature1 = dht1.toFahrenheit(temperature1); } send(msgTemp1.set(temperature1, 1)); Serial.print("T: "); Serial.println(temperature1); } float humidity1 = dht1.getHumidity(); if (isnan(humidity1)) { Serial.println("Failed reading humidity from DHT1"); } else if (humidity1 != lastHum1) { lastHum1 = humidity1; send(msgHum1.set(humidity1, 1)); Serial.print("H: "); Serial.println(humidity1); } float temperature2 = dht2.getTemperature(); if (isnan(temperature2)) { Serial.println("Failed reading temperature from DHT2"); } else if (temperature2 != lastTemp2) { lastTemp2 = temperature2; if (!metric) { temperature2 = dht2.toFahrenheit(temperature2); } send(msgTemp2.set(temperature2, 1)); Serial.print("T: "); Serial.println(temperature2); } float humidity2 = dht2.getHumidity(); if (isnan(humidity2)) { Serial.println("Failed reading humidity from DHT2"); } else if (humidity2 != lastHum2) { lastHum2 = humidity2; send(msgHum2.set(humidity2, 1)); Serial.print("H: "); Serial.println(humidity2); } float temperature3 = dht3.getTemperature(); if (isnan(temperature3)) { Serial.println("Failed reading temperature from DHT3"); } else if (temperature3 != lastTemp3) { lastTemp3 = temperature3; if (!metric) { temperature3 = dht3.toFahrenheit(temperature3); } send(msgTemp3.set(temperature3, 1)); Serial.print("T: "); Serial.println(temperature3); } float humidity3 = dht3.getHumidity(); if (isnan(humidity3)) { Serial.println("Failed reading humidity from DHT3"); } else if (humidity3 != lastHum3) { lastHum3 = humidity3; send(msgHum3.set(humidity3, 1)); Serial.print("H: "); Serial.println(humidity3); } // sleep(SLEEP_TIME); //sleep a bit // wait(SLEEP_TIME); //sleep a bit // }
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@turborick looks fine to me, does it compile?
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@korttoma yes it compiles. here is the output from serial monitor
Starting repeater (RNNRA-, 2.0.0) 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: 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=18,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:SEND 2-2-0-0 s=255,c=3,t=11,pt=0,l=9,sg=0,ft=0,st=ok:MultiDHT2 TSP:MSG:SEND 2-2-0-0 s=255,c=3,t=12,pt=0,l=3,sg=0,ft=0,st=ok:1.0 TSP:MSG:SEND 2-2-0-0 s=1,c=0,t=7,pt=0,l=0,sg=0,ft=0,st=ok: TSP:MSG:SEND 2-2-0-0 s=2,c=0,t=6,pt=0,l=0,sg=0,ft=0,st=ok: TSP:MSG:SEND 2-2-0-0 s=3,c=0,t=7,pt=0,l=0,sg=0,ft=0,st=ok: TSP:MSG:SEND 2-2-0-0 s=4,c=0,t=6,pt=0,l=0,sg=0,ft=0,st=ok: TSP:MSG:SEND 2-2-0-0 s=5,c=0,t=7,pt=0,l=0,sg=0,ft=0,st=ok: TSP:MSG:SEND 2-2-0-0 s=6,c=0,t=6,pt=0,l=0,sg=0,ft=0,st=ok: 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 TSP:MSG:SEND 2-2-0-0 s=2,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.8 T: 18.80 TSP:MSG:SEND 2-2-0-0 s=1,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:29.0 H: 29.00 TSP:MSG:SEND 2-2-0-0 s=4,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.7 T: 18.70 TSP:MSG:SEND 2-2-0-0 s=3,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:27.5 H: 27.50 TSP:MSG:SEND 2-2-0-0 s=6,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.8 T: 18.80 TSP:MSG:SEND 2-2-0-0 s=5,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:30.0 H: 30.00 TSP:MSG:SEND 2-2-0-0 s=4,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.6 T: 18.60 TSP:MSG:SEND 2-2-0-0 s=5,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:30.1 H: 30.10 TSP:SANCHK:OK TSP:MSG:SEND 2-2-0-0 s=1,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:28.9 H: 28.90 TSP:MSG:SEND 2-2-0-0 s=3,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:27.4 H: 27.40 TSP:MSG:SEND 2-2-0-0 s=4,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.7 T: 18.70 TSP:MSG:SEND 2-2-0-0 s=3,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:27.5 H: 27.50 TSP:MSG:SEND 2-2-0-0 s=6,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=ok:18.7 T: 18.70 TSP:MSG:SEND 2-2-0-0 s=5,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=ok:30.2 H: 30.20 TSP:SANCHK:OK
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@turborick seems to be working just fine, don´t you think?
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@korttoma I'll try and add to Vera tomorrow
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