Combining relay and temperature sketch

[Newzwaver]

Did you get this working and if so can you share?

[bluezr1]

@newzwaver I'm curious aswell, been pounding my head all night trying to get a temperature and relay into one sketch.

[Newzwaver]

HI

I did get it to work and will post the sketch later today after work. I have it working on the ESP8266 and Arduino.

[Newzwaver]

I figured why wait, this has the temp, hum and 2 relays working not problem. One relay controls my fan for my AV and the other controls my doorbell for my HTD Lync system.

/**
 * 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
#define MY_NODE_ID 29
// Enable and select radio type attached 
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
//#define MY_RS485

// Enable repeater functionality for this node
#define MY_REPEATER_FEATURE


#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

#define RELAY_1  4  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define RELAY_2  5  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)

#define NUMBER_OF_RELAYS 2 // Total number of attached relays
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay

// 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 28
#define CHILD_ID_TEMP 30

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 before()
{
  for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
    // Then set relay pins in output mode
    pinMode(pin, OUTPUT);
    // Set relay to last known state (using eeprom storage)
    digitalWrite(pin, loadState(sensor)?RELAY_ON:RELAY_OFF);
  }
}

void presentation()  
{ 
  // Send the sketch version information to the gateway
  sendSketchInfo("AVCABRelayTempAndHumidity", "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 = getControllerConfig().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 receive(const MyMessage &message)     
{  
  // 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));
  if (message.type==V_STATUS) {

    // Change relay state
    digitalWrite(message.sensor-1+RELAY_1, message.getBool()?RELAY_ON:RELAY_OFF);
    // Store state in eeprom
    saveState(message.sensor, message.getBool());
    #ifdef MY_DEBUG
    Serial.print("H: ");
    Serial.println(humidity);
    Serial.print("Incoming change for sensor:");
    Serial.print(message.sensor);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
    #endif
  } else {
    // Increase no update counter if the humidity stayed the same
    nNoUpdatesHum++;
  }

  // Sleep for a while to save energy
  sleep(UPDATE_INTERVAL); 
  }}

[rejoe2]

@newzwaver your code is pretty hard to read due to not beeing entirely formatted as code.
Nevertheless there seems not to exist any loop() section and the node is put to sleep after having received anything for a certain periode of time.
This may work in most cases, but imo is not a "lucky code design".

Imo better aproach:
Use the https://www.arduino.cc/en/tutorial/BlinkWithoutDelay - principle. Additionally a wait() is used instead of sleep() for the time to fulfill measurements (DS18B20 in my case).
If you need a working implementation of the blink-without-delay function within MySensors, see the https://www.mysensors.org/build/pulse_power example.
At least three of my nodes (combining temperature and relays) work pretty well like that.

[bluezr1]

@rejoe2 said in Combining relay and temperature sketch:

Thanks Newzwaver

You wouldn't happen to have a sketch with the DS18B20? I have both DHTs and DS18B20s but plan on using this to turn on and off a fan to keep my AV equipment cool. So I'm not that concerned about humidity although it wouldn't be deal breaker if it did.

Thanks,

[rejoe2]

@bluezr1 Sure... But imo it is easier to stick with the given examples, they may be much easier to understand than e.g. this one:grin:

[sincze]

@rejoe2 NIce example thanks.

[rejoe2]

@sincze Thanks too.
Just to mention: I don't use the internal functionality for the servo any more - this part didn't work to my personal satisfaction.
If you're interested: The RS485 variant in the repo is even more complex - it uses three Pins for 1wire with different timings, but may require some tweeks in the libs to compile.

[bluezr1]

Thank you so much Newzwaver. I've been trying to combine two sketches together and this is my first successful one. I may never be as good as most of the people on this forum, although I don't plan on stopping with combining more than one sensor to one node -- need to get rid of my double nodes I have in various places. :)

When I ran your sketch and the relays didn't show up in vera. So after I copied and pasted from the relay sketch posted by hek under void presentation, I ended up with errors. So after comparing the two (yours to hek's) I ended up with this that seems to be working.

As of right now I'm looking into what rejoe2 said about using wait instead of sleep, unless I'll be fine with what I have?

/**
 * 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

// Enable repeater functionality for this node
//#define MY_REPEATER_FEATURE

#define MY_NODE_ID 10
#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

//#define RELAY1_PIN  4  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
//#define RELAY2_PIN  5  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)

#define RELAY_PIN 4  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define NUMBER_OF_RELAYS 2 // Total number of attached relays
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay

// 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 = 1000;

// 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 28
#define CHILD_ID_TEMP 30

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 before()
{
    for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Then set relay pins in output mode
        pinMode(pin, OUTPUT);
        // Set relay to last known state (using eeprom storage)
        digitalWrite(pin, loadState(sensor)?RELAY_OFF:RELAY_ON);
    }
}

void presentation()  
{ 
  // Send the sketch version information to the gateway
  sendSketchInfo("AVCABRelayTempAndHumidity", "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);
  
    for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Register all sensors to gw (they will be created as child devices)
        present(sensor, S_BINARY);
    }

  metric = getControllerConfig().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); 
}
  
void receive(const MyMessage &message)
{
    // We only expect one type of message from controller. But we better check anyway.
    if (message.type==V_STATUS) {
        // Change relay state
        digitalWrite(message.sensor-1+RELAY_PIN, message.getBool()?RELAY_OFF:RELAY_ON);
        // Store state in eeprom
        saveState(message.sensor, message.getBool());
        // Write some debug info
        Serial.print("Incoming change for sensor:");
        Serial.print(message.sensor);
        Serial.print(", New status: ");
        Serial.println(message.getBool());
    }
}```

[rejoe2]

@bluezr1 Great to hear about you having first positive results.

Nevertheless, imo the sketch you posted is designed against some basic principles.

First: all main functions should be placed in the loop() section (not present in this sketch). The posted sketch does all the measurements within an exceptional routine called receive(). This should be reserved for all functionality that really is related to receive any info from controller side - obviously doing measurements does not belong to that category.

I also started as complete noob to coding around 30 months ago and just followed the examples (mostly from Build section), so be assured: you will also learn how to do this just by following these examples and ask yourself why things are solved the way they are.

If you need a good example of a combined sketch, have a look at the atmospheric pressure one (or the DHT (humidity?) sketch you have used here): They already have two children... From the BME180-Preassure you may follow the route to the BME280 examples available in the forum here or in my repo (#98, RS485).

Btw: In the header section of your sketch there are also two defines left not necessary (just as a info, this does not cause any trouble for the moment).

[sincze]

haha combining sketches... frees up some hardware ;-) for other stuff.

[bluezr1]

@rejoe2 I listened to what you said and then went back over it, it's working much better now. What you said "why things are solved the way they are" made me stand back for a moment. I do Maintenance for a living and work on everything from HVAC, boilers, Kitchen equipment to hanging drywall. There's always one thing I always tell myself when troubleshooting something, what's the sequence of operation. Well I'm not to savvy with writing code although the same principles applies. Maybe I just needed someone to tell me that, I don't know.

Anyways, thank you

I updated the sketch I posted in my last post with the changes I made.

[rejoe2]

@sincze Does not only free HW for other stuff, but also makes things easier once they work as expected. I have to admitt this in some cases may need hard work to get to that point.
What's the "other stuff" showed on your picture?

@bluezr1 Looks like a big step ahead!

Imo next step in your code should be to have a look at the remarks I already posted and replace the sleep() by wait(). By now, you have a rather fast update rate of your values, this may not be necessary and also may lead to a early wear-out of your DHT (?):

@rejoe2 said in Combining relay and temperature sketch:

Imo better aproach:
Use the https://www.arduino.cc/en/tutorial/BlinkWithoutDelay - principle. Additionally a wait() is used instead of sleep() for the time to fulfill measurements (DS18B20 in my case).
If you need a working implementation of the blink-without-delay function within MySensors, see the https://www.mysensors.org/build/pulse_power example.

Please keep in mind changing existent posts like you did may lead to irritation wrt to the remarks in following posts. You may better show the resulting code as an update in your next answer and add a remark wrt. to enhancements in the earlier one.

[bluezr1]

@rejoe2 Just so I know that I’m not heading down the wrong path and wasting everyone’s time, I should be looking into the use of millis correct?

[rejoe2]

@bluezr1 Yes, millis() is the right thing to look for (or the simpleTimer2-lib, that internally does the same things). But keep in mind: sleep() and millis() don't fit well together, as after every sleep() millis() will be reset... Use wait() instead of sleep() in case you need short periods eg. between initialising and completion of measurements.

[bluezr1]

This is where I'm currently at, it seems to be working really well. Thanks rejoe2

/**
 * 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

#define MY_NODE_ID 19
#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 10
#define CHILD_ID_TEMP 11

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;

#define RELAY_PIN 4  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define NUMBER_OF_RELAYS 2 // Total number of attached relays
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay


void before()
{
    for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Then set relay pins in output mode
        pinMode(pin, OUTPUT);
        // Set relay to last known state (using eeprom storage)
        digitalWrite(pin, loadState(sensor)?RELAY_OFF:RELAY_ON);
    }
}

void presentation()  
{ 
  // Send the sketch version information to the gateway
  sendSketchInfo("TempRELAY", "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 = getControllerConfig().isMetric;

  for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Register all sensors to gw (they will be created as child devices)
        present(sensor, S_BINARY);
    }
}


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)
  wait(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
  wait(UPDATE_INTERVAL); 
}

void receive(const MyMessage &message)
{
    // We only expect one type of message from controller. But we better check anyway.
    if (message.type==V_STATUS) {
        // Change relay state
        digitalWrite(message.sensor-1+RELAY_PIN, message.getBool()?RELAY_OFF:RELAY_ON);
        // Store state in eeprom
        saveState(message.sensor, message.getBool());
        // Write some debug info
        Serial.print("Incoming change for sensor:");
        Serial.print(message.sensor);
        Serial.print(", New status: ");
        Serial.println(message.getBool());
    }
}```

[rejoe2]

@bluezr1 Looks already really good.
Question: does the receive() work while the loop does the wait()? I'm not sure about that, because I am used to do the millis()-nonblocking-loop.

[bluezr1]

@rejoe2 I hope that this answers your question. I use Vera as my home controller and tried multiple times turning (sometimes randomly) on and off both relays without any misses as soon as Vera allowed me. Meaning, Vera won’t let you instantly turn a device on and then off or vise versa.

Do you think I’ll be ok the way it is or should I keep working on this project?

[rejoe2]

@bluezr1 As it seems to work to your satisfaction, you may leave it as is.
FHEM as a controller allows direct interaction with switching devices, and it is really astonishing to hear Vera may have some restrictions wrt. that.

But I didn't test your code in my setup, this is why I asked about your observations.

I may be wrong, but imo, the code isn't yet perfect, so you might keep that in mind for the future in case you run into trouble. In case you need some sort of timer for other projects, you would miss the opportunity to learn how to use this...