@mickecarlsson Thanks. You explained that great :) I done some rework in my project and I am not using PIN 0 and 1 anymore.

Sure. Sorry

I send you modified code. I use relays, DHT sensors, reeds and motion sensors in one sketch (almast all pins are used).
In PIN 0 and 1 I use Reed Switches. Normally for Reed switches I want to use all pins in Arduino Mega from 0 to 21 (all pins work except 0 and 1 here...)

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

// Enable inclusion mode
#define MY_INCLUSION_MODE_FEATURE
// Enable Inclusion mode button on gateway
#define MY_INCLUSION_BUTTON_FEATURE

// Inverses behavior of inclusion button (if using external pullup)
//#define MY_INCLUSION_BUTTON_EXTERNAL_PULLUP

// Set inclusion mode duration (in seconds)
#define MY_INCLUSION_MODE_DURATION 60 

// Digital pin used for inclusion mode button
#define MY_INCLUSION_MODE_BUTTON_PIN  3 

#include <SPI.h>
#include <MySensors.h>  
#include <Bounce2.h>
#include <DHT.h> // modified DHT11, DHT22 sensors library. Check Warning info!

// -------------- PINS DEFINITION (Definicja Pinow) --------------

/** ------- RGB LED (dioda RGB LED doustalania stanow)
 * RGB LED shows active status (using colors)
*/

int redRGBLEDPin = A0;
int greenRGBLEDPin = A1;
int blueRGBLEDPin = A2;

/** ------- RELAYS (przekazniki SSR, fotek)
 * Relays for Rack Moung (przekaznik SSR i Fotek - szafka rack)
*/

#define RELAY_PIN_1 52 // PINs for Relays

#define BUTTON_PIN A4 // PINS Buttons for Relays - to use normal wall switches (Przyciski / laczniki scienne)

#define NUMBER_OF_RELAYS 10 // Total number of attached relays UNUSED!
#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

// ------- Relay for save state inside Arduino's EEPROM

bool loadedState1 = false;
bool initialValueSent = false;

/** ------- REED SWTCHES (kontaktrony)
 * Relays for Rack Moung (Kontaktron w szafce Rack i w szufladzie z Arduino)
*/

// ------- PINs for Reeds
#define REED_PIN_1 0 ' PIN 0
#define REED_PIN_2 1 ' PIN 1

int oldValue=-1;

// ------- VARIABLES for reed switch

int oldValue1=-1;
int oldValue2=-1;
bool state = false;

/** ------- PIR SENSORS (czujki ruchu)
 * PIR Sensors for Rack Moung (sensory ruchu na obudowie Rack)
*/

// ------- PINs for PIR sensor
#define DIGITAL_INPUT_SENSOR1 23   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define DIGITAL_INPUT_SENSOR2 25
#define SLEEP_NODE true

// ------- VARIABLES for PIR sensor
uint32_t SLEEP_TIME = 1000; // 120000; // Sleep time between reports (in milliseconds)

int oldValueA = 0;
int oldValueB = 0;

bool stateA = false;
bool stateB = false;

/** ------- TEMPERATURE / HUMIDITY SENSOR (czujnik temperatury i wilgotnosci)
 * DHT22 sensors for checking temp and hum inside / outside Rack Mount (czujniki DHT22)
*/

// ------- PINs for DHTs
#define DHTPIN 22
#define DHTPIN2 24
#define DHTPIN3 26

// ------- Initialize DHT sensor

DHT dht1;
DHT dht2;
DHT dht3;

unsigned long timeDHT = 30000; // 30 seconds

unsigned long actualTime = 0;
unsigned long actualTime2 = 0;
unsigned long actualTime3 = 0;

unsigned long recentTimeHum1 = 0;
unsigned long recentTimeHum2 = 0;
unsigned long recentTimeHum3 = 0;

float lastTemp1;
float lastTemp2;
float lastTemp3;

float lastHum1;
float lastHum2;
float lastHum3;

boolean metric = true;

// -------------- CHILD IDs (ID wszystkich sensorow) --------------

#define CHILD_ID_REED1 0 
#define CHILD_ID_REED2 10 

#define CHILD_ID_TEMP1 1
#define CHILD_ID_HUM1 2

#define CHILD_ID_MOTION1 3
#define CHILD_ID_MOTION2 4

#define CHILD_ID_RELAY1 5

#define CHILD_ID_TEMP2 6
#define CHILD_ID_HUM2 7

#define CHILD_ID_TEMP3 8
#define CHILD_ID_HUM3 9

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

void before() {
	for (int sensor=1, pin=RELAY_PIN_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);
	}
}

// Reed switches needs debouncers
Bounce debouncer_reed1 = Bounce();
Bounce debouncer_reed2 = Bounce();

//Relays switched - don't need debouncers
Bounce debouncer_relay1 = Bounce();
Bounce debouncer = Bounce();

// Debouncer for Motion sensor
Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();

// -------------- CHILD Initialization (inicjalizacja czujnikow) --------------

// Initialize Relay
MyMessage msg(CHILD_ID_RELAY1, V_STATUS);

// Initialize reed switches
MyMessage msgReed1(CHILD_ID_REED1, V_TRIPPED);
MyMessage msgReed2(CHILD_ID_REED2, V_TRIPPED);

// Initialize DHT22
MyMessage msgTemp1(CHILD_ID_TEMP1, V_TEMP);
MyMessage msgHum1(CHILD_ID_HUM1, V_HUM);

MyMessage msgTemp2(CHILD_ID_TEMP2, V_TEMP);
MyMessage msgHum2(CHILD_ID_HUM2, V_HUM);

MyMessage msgTemp3(CHILD_ID_TEMP3, V_TEMP);
MyMessage msgHum3(CHILD_ID_HUM3, V_HUM);

// Initialize motion message
MyMessage msg_motion1(CHILD_ID_MOTION1, V_TRIPPED);
MyMessage msg_motion2(CHILD_ID_MOTION2, V_TRIPPED);

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

void setup() {

   // Setup RGB Led pins 
  pinMode(redRGBLEDPin, OUTPUT);
  pinMode(greenRGBLEDPin, OUTPUT);
  pinMode(blueRGBLEDPin, OUTPUT);     

   // Setup locally attached sensors
	delay(100); 

	// Setup DHT sensors
	dht1.setup(DHTPIN);
	dht2.setup(DHTPIN2);
	dht3.setup(DHTPIN3);

	// Setup the button.
	pinMode(BUTTON_PIN, INPUT_PULLUP);
	// After setting up the button, setup debouncer.
	debouncer.attach(BUTTON_PIN);
	debouncer.interval(5);
	debouncer_relay1.attach(RELAY_PIN_1);
	debouncer_relay1.interval(5);
 
	// Setup the reed PINs
	pinMode(REED_PIN_1,INPUT_PULLUP);
	debouncer_reed1.attach(REED_PIN_1);
	debouncer_reed1.interval(10);
  pinMode(REED_PIN_2,INPUT_PULLUP);
  debouncer_reed2.attach(REED_PIN_2);
  debouncer_reed2.interval(10);
           

	// Make sure relays are off when starting up
	digitalWrite(RELAY_PIN_1, RELAY_OFF);
	// Then set relay pins in output mode
	pinMode(RELAY_PIN_1, OUTPUT);

	// Set relay to last known state (using eeprom storage) 
	loadedState1 = loadState(CHILD_ID_RELAY1);

	// setup debouncer for Reed switch
	debouncer_reed1.attach(REED_PIN_1);
	debouncer_reed1.interval(5);
  debouncer_reed2.attach(REED_PIN_2);
  debouncer_reed2.interval(5);        

	pinMode(REED_PIN_1,INPUT);
	digitalWrite(REED_PIN_1,HIGH);
  pinMode(REED_PIN_2,INPUT);
  digitalWrite(REED_PIN_2,HIGH);

	// Setup PIR Motion sensor "button"
	pinMode(DIGITAL_INPUT_SENSOR1, INPUT_PULLUP); // Setup the button Activate internal pull-up
	pinMode(DIGITAL_INPUT_SENSOR2, INPUT_PULLUP); //  sets the motion sensor digital pin as input / Setup the button Activate internal pull-up

	// setup debouncer for motion sensor
	debouncerA.attach(DIGITAL_INPUT_SENSOR1);
	debouncerA.interval(5);

	debouncerB.attach(DIGITAL_INPUT_SENSOR2);
	debouncerB.interval(5);

}

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

void presentation()  {
	
	sendSketchInfo("Arduino6", "1.0");

	// Register all sensors to gw (gateway - they will be created as child devices)
	present(CHILD_ID_RELAY1, S_BINARY);

	present(CHILD_ID_REED1, S_DOOR);  
  present(CHILD_ID_REED2, S_DOOR);

	present(CHILD_ID_TEMP1, S_TEMP);
	present(CHILD_ID_HUM1, S_HUM);

	present(CHILD_ID_TEMP2, S_TEMP);
	present(CHILD_ID_HUM2, S_HUM);

	present(CHILD_ID_TEMP3, S_TEMP);
	present(CHILD_ID_HUM3, S_HUM);  

	present(CHILD_ID_MOTION1, S_MOTION);
	present(CHILD_ID_MOTION2, S_MOTION);
  
}

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

void loop() {
	actualTime = millis();

	/**
	 * ------- DHT22 SENSOR
	*/

	if (actualTime - recentTimeHum1 >= timeDHT) {	

		recentTimeHum1 = actualTime;

		float temperature1 = dht1.getTemperature();
		if (isnan(temperature1)) {		
		} else if (temperature1 != lastTemp1) {
			lastTemp1 = temperature1;
		if (!metric) {
			temperature1 = dht1.toFahrenheit(temperature1);
		}
			send(msgTemp1.set(temperature1, 1));
		}

		float humidity1 = dht1.getHumidity();
		if (isnan(humidity1)) {
		} else if (humidity1 != lastHum1) {
			lastHum1 = humidity1;
			send(msgHum1.set(humidity1, 1));
		}

		float temperature2 = dht2.getTemperature();
		if (isnan(temperature2)) {
		} else if (temperature2 != lastTemp2) {
			lastTemp2 = temperature2;
		  if (!metric) {
			temperature2 = dht2.toFahrenheit(temperature2);
		  }
			send(msgTemp2.set(temperature2, 1));
		}

		float humidity2 = dht2.getHumidity();
		if (isnan(humidity2)) {
		} else if (humidity2 != lastHum2) {
			lastHum2 = humidity2;
			send(msgHum2.set(humidity2, 1));
		}

		float temperature3 = dht3.getTemperature();
		if (isnan(temperature3)) {
		} else if (temperature3 != lastTemp3) {
			lastTemp3 = temperature3;
		  if (!metric) {
			temperature3 = dht3.toFahrenheit(temperature3);
		  }
			send(msgTemp3.set(temperature3, 1));
		}

		float humidity3 = dht3.getHumidity();
		if (isnan(humidity3)) {
		} else if (humidity3 != lastHum3) {
			lastHum3 = humidity3;
			send(msgHum3.set(humidity3, 1));
		}
	}

	/**
	 * ------- MOTION SENSORS
	*/

	debouncerA.update(); // Get the update value
	int valueA = debouncerA.read();

	if (valueA != oldValueA) {
		// Send in the new value
		send(msg_motion1.set(valueA == HIGH ? 1 : 0)); // Send tripped value to gw
		oldValueA = valueA;
    setColor(255, 0, 0);  // red
		wait(5);
	}    

	debouncerB.update(); 
	int valueB = debouncerB.read();

	if (valueB != oldValueB) {
		send(msg_motion2.set(valueB == HIGH ? 1 : 0));
		oldValueB = valueB;
    setColor(255, 0, 0);  // red
		wait(5);
	}  
	
	/**
	 * ------- SIGNAL-BASED SENSORS
	*/
	
	if (!initialValueSent) {

		// ------- RELAYS

		send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));

		// -------  REED SWITCHES
		
		int value1 = debouncer_reed1.read();
		send(msgReed1.set(value1==HIGH ? 1 : 0));
		wait(5);
    int value2 = debouncer_reed2.read();
    send(msgReed2.set(value2==HIGH ? 1 : 0));
    wait(5);
                     

		request(CHILD_ID_RELAY1, V_STATUS);
   
		request(CHILD_ID_REED1, V_TRIPPED);
    request(CHILD_ID_REED2, V_TRIPPED);
                 
    
		// -------  SHORT WAIT TIME
		wait(2000, C_SET, V_STATUS);

	}

	// -------  Send locally attached sensor data here 
	
	if (debouncer.update()) {
		// -------  Get the update value.
		int value = debouncer.read();
		
		// -------  Send in the new value.
		if(value != oldValue){
			saveState(CHILD_ID_RELAY1, !loadState(CHILD_ID_RELAY1));
			digitalWrite(RELAY_PIN_1, loadState(CHILD_ID_RELAY1)?RELAY_ON:RELAY_OFF);
			send(msg.set(loadState(CHILD_ID_RELAY1)));
			oldValue = value;
      //setColor(0, 0, 255);  // blue
		}
	}

	if (debouncer_reed1.update()) {

		int value1 = debouncer_reed1.read();
		
		if (value1 != oldValue1) {
			send(msgReed1.set(value1==HIGH ? 1 : 0));
			oldValue1 = value1;
      setColor(0, 255, 0);  // green
		}
	}

  if (debouncer_reed2.update()) {

    int value2 = debouncer_reed2.read();
    
    if (value2 != oldValue2) {
      send(msgReed2.set(value2==HIGH ? 1 : 0));
      oldValue2 = value2;
      setColor(0, 255, 0);  // green
    }
  }

    
}

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

void receive(const MyMessage &message) {

	if (message.type == V_STATUS) {
		if (!initialValueSent) {
		  initialValueSent = true; //Serial.println("Receiving initial value from controller");
		}
	
		switch (message.sensor) {
			case CHILD_ID_RELAY1:
				loadedState1 =  message.getBool();
				digitalWrite(RELAY_PIN_1, loadedState1 ? RELAY_ON : RELAY_OFF);
				saveState(CHILD_ID_RELAY1, loadedState1);
				send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));
        setColor(0, 0, 255);  // blue
			break;

		}

	}
}

// --- For RGB Led -------------------------------------------------------------
void setColor(int red, int green, int blue)
{
  #ifdef COMMON_ANODE
    red = 255 - red;
    green = 255 - green;
    blue = 255 - blue;
  #endif
  analogWrite(redRGBLEDPin, red);
  analogWrite(greenRGBLEDPin, green);
  analogWrite(blueRGBLEDPin, blue);  
}

Hi. This is a begginer question but I cannot find the answer, I use Mysensors for a while and I have some difficulties using PIN 0 and 1. In reed switches I use send(msg.set(value==HIGH ? 1 : 0)), and in SSR relays I use for example digitalWrite(RELAY_PIN_1, loadState(CHILD_ID_RELAY1)?RELAY_ON:RELAY_OFF); (where
#define RELAY_ON 1
#define RELAY_OFF 0
Please tell me if this is the problem that PIN 0 and 1 doesnt work?What to do to use this pins and maintain my recent PIN usage...?

Thanx @skywatch I will try to apply this to my sketch and I come back :)

BTW - this fridge / freezer looks interesting. Good idea. You put your DHT inside freezer wired with cable, or battery?

@Yveaux I tried to declare variable like
DHT dht1;
DHT dht2;
DHT dht3;

Then in void setup() setup DHT's but my DHT library throw errors (: error: no matching function for call to 'DHT::DHT()').

I use standard DHT library downloaded yesterday from Arduino INO library (I cannot check version right now)...

Hi servo. Below is my sketch that works in Home Assistant (DHT, reed, relay, motion sensors). It has only problem with multiple DHT but I'm working on it.

When connecting via USB use: #define MY_GATEWAY_SERIAL

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

// Enable inclusion mode
#define MY_INCLUSION_MODE_FEATURE
// Enable Inclusion mode button on gateway
#define MY_INCLUSION_BUTTON_FEATURE

// Inverses behavior of inclusion button (if using external pullup)
//#define MY_INCLUSION_BUTTON_EXTERNAL_PULLUP

// Set inclusion mode duration (in seconds)
#define MY_INCLUSION_MODE_DURATION 60 
// Digital pin used for inclusion mode button
#define MY_INCLUSION_MODE_BUTTON_PIN  3 

#include <SPI.h>
#include <MySensors.h>  
#include <Bounce2.h>
#include <DHT.h> // DHT11, DHT22 sensors

// ------- PINS DEFINITION

// RELAYS
// Arduino Digital I/O pin number for first relay (second on pin+1 etc)
// Relay for first floor - 10 pcs (Przelaczniki SSR - pierwsze pietro)
#define RELAY_PIN_1 22

// Buttons for Relays - to use normal wall switches (Przyciski / laczniki scienne - pierwsze pietro)
#define BUTTON_PIN A0 

#define NUMBER_OF_RELAYS 10 // 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

// Arduino Digital I/O pin for button/reed switch
// Reeds 
#define REED_PIN_1 5


// PIR  SENSORS
uint32_t SLEEP_TIME = 1000; // 120000; // Sleep time between reports (in milliseconds)
#define DIGITAL_INPUT_SENSOR1 22   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define DIGITAL_INPUT_SENSOR2 23
#define SLEEP_NODE true

// DHT22
#define DHTPIN 4        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302), DHT11

#define DHTPIN2 24        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE2 DHT22   // DHT 22  (AM2302), DHT11

#define DHTPIN3 25        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE3 DHT22   // DHT 22  (AM2302), DHT11

// ------- Data for Motion sensor

int oldValueA = 0;
int oldValueB = 0;

bool stateA = false;
bool stateB = false;

unsigned long timeDHT1 = 30000; // 30 seconds
unsigned long timeDHT2 = 31000; // 30 seconds
unsigned long timeDHT3 = 32000; // 30 seconds

unsigned long actualTime = 0;
unsigned long recentTimeHum1 = 0;

unsigned long actualTime2 = 0;
unsigned long recentTimeHum2 = 0;

unsigned long actualTime3 = 0;

unsigned long recentTimeHum3 = 0;

// Initialize DHT sensor
float lastTemp;
float lastTemp2;
float lastTemp3;

float lastHum;
float lastHum2;
float lastHum3;

boolean metric = true;

// for reed switch
int oldValue=-1;

bool state = false;

// Relay for save state inside Arduino's EEPROM
bool loadedState1 = false;

bool initialValueSent = false;

// ------- CHILD IDs 

// REEDS
#define CHILD_ID_REED1 0   // Id of the sensor child

// Define CHILD_IDs
#define CHILD_ID_TEMP1 1 // Id of the sensor child
#define CHILD_ID_HUM1 2 // Id of the sensor child

#define CHILD_ID_MOTION1 3   // Id of the sensor child
#define CHILD_ID_MOTION2 4 // Id of the sensor child

#define CHILD_ID_RELAY1 5 // Id of the sensor child

#define CHILD_ID_TEMP2 6 // Id of the sensor child
#define CHILD_ID_HUM2 7 // Id of the sensor child

#define CHILD_ID_TEMP3 8 // Id of the sensor child
#define CHILD_ID_HUM3 9 // Id of the sensor child

// ------- 

void before()
{
  for (int sensor=1, pin=RELAY_PIN_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);
  }
}

// Reed switches needs debouncers
Bounce debouncer_reed1 = Bounce();

//Relays switched - don't need debouncers
Bounce debouncer_relay1 = Bounce();
Bounce debouncer = Bounce();

// Debouncer for Motion sensor
Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();

// Initialize Relay
MyMessage msg(CHILD_ID_RELAY1, V_STATUS);

// Initialize reed switches
MyMessage msgReed1(CHILD_ID_REED1, V_TRIPPED);


// Initialize DHT22
MyMessage msgTemp(CHILD_ID_TEMP1, V_TEMP);
MyMessage msgHum(CHILD_ID_HUM1, V_HUM);

MyMessage msgTemp2(CHILD_ID_TEMP2, V_TEMP);
MyMessage msgHum2(CHILD_ID_HUM2, V_HUM);

MyMessage msgTemp3(CHILD_ID_TEMP3, V_TEMP);
MyMessage msgHum3(CHILD_ID_HUM3, V_HUM);

// Initialize motion message
MyMessage msg_motion1(CHILD_ID_MOTION1, V_TRIPPED);
MyMessage msg_motion2(CHILD_ID_MOTION2, V_TRIPPED);


void setup() {

   // Setup locally attached sensors
  delay(100); 

   // Setup the button.
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  // After setting up the button, setup debouncer.
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(5);
  debouncer_relay1.attach(RELAY_PIN_1);
  debouncer_relay1.interval(5);
  // Setup the button
  pinMode(REED_PIN_1,INPUT_PULLUP);
  debouncer_reed1.attach(REED_PIN_1);
  debouncer_reed1.interval(10);
 
  // Make sure relays are off when starting up
  digitalWrite(RELAY_PIN_1, RELAY_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY_PIN_1, OUTPUT);

  // Set relay to last known state (using eeprom storage) 
  loadedState1 = loadState(CHILD_ID_RELAY1);

  
  // setup debouncer for Reed switch
  debouncer_reed1.attach(REED_PIN_1);
  debouncer_reed1.interval(5);

  pinMode(REED_PIN_1,INPUT);
  digitalWrite(REED_PIN_1,HIGH);

  // Setup PIR Motion sensor "button"
  pinMode(DIGITAL_INPUT_SENSOR1, INPUT_PULLUP); // Setup the button Activate internal pull-up
  pinMode(DIGITAL_INPUT_SENSOR2, INPUT_PULLUP); //  sets the motion sensor digital pin as input / Setup the button Activate internal pull-up
  
    // setup debouncer for motion sensor
  debouncerA.attach(DIGITAL_INPUT_SENSOR1);
  debouncerA.interval(5);

  debouncerB.attach(DIGITAL_INPUT_SENSOR2);
  debouncerB.interval(5);
  
}

void presentation()  {
  sendSketchInfo("Arduino5", "1.0");
  
  // Register all sensors to gw (gateway - they will be created as child devices)
  present(CHILD_ID_RELAY1, S_BINARY);
  
  present(CHILD_ID_REED1, S_DOOR);  

  present(CHILD_ID_TEMP1, S_TEMP);
  present(CHILD_ID_HUM1, S_HUM);
  
  present(CHILD_ID_TEMP2, S_TEMP);
  present(CHILD_ID_HUM2, S_HUM);
  
  present(CHILD_ID_TEMP3, S_TEMP);
  present(CHILD_ID_HUM3, S_HUM);  
  
  present(CHILD_ID_MOTION1, S_MOTION);
  present(CHILD_ID_MOTION2, S_MOTION);

}

void loop() {

actualTime = millis();

  // --- DHT22 SENSOR1 
  if (actualTime - recentTimeHum1 >= timeDHT1) {

    recentTimeHum1 = actualTime;
    // DHT sensor
    DHT dht(DHTPIN, DHTTYPE); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    if (isnan(temperature)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature != lastTemp) {
        lastTemp = temperature;
        if (!metric) {
          temperature = dht.readTemperature(true);
        }

        //Serial.print("T: ");
        //Serial.print(temperature);
        //Serial.print(" | H: ");
        //Serial.println(humidity);
        send(msgTemp.set(temperature, 1));
        send(msgHum.set(humidity, 1));
      } else {
        //Serial.println("Temperature doesn't change => don't update changes");
        //Serial.print("T: ");
        //Serial.print(temperature);
        //Serial.print(" | H: ");
        //Serial.println(humidity);
        send(msgTemp.set(temperature, 1));
        send(msgHum.set(humidity, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // --- DHT22 SENSOR2
  if (actualTime2 - recentTimeHum2 >= timeDHT2) {

    recentTimeHum2 = actualTime2;
    // DHT2 sensor
    DHT dht2(DHTPIN2, DHTTYPE2); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature2 = dht2.readTemperature();
    float humidity2 = dht2.readHumidity();
    if (isnan(temperature2)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature2 != lastTemp2) {
        lastTemp2 = temperature2;
        if (!metric) {
          temperature2 = dht2.readTemperature(true);
        }

        send(msgTemp2.set(temperature2, 1));
        send(msgHum2.set(humidity2, 1));
      } else {
        send(msgTemp2.set(temperature2, 1));
        send(msgHum2.set(humidity2, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // --- DHT22 SENSOR2
  if (actualTime3 - recentTimeHum3 >= timeDHT3) {

    recentTimeHum3 = actualTime3;
    // DHT3 sensor
    DHT dht3(DHTPIN3, DHTTYPE3); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature3 = dht3.readTemperature();
    float humidity3 = dht3.readHumidity();
    if (isnan(temperature3)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature3 != lastTemp3) {
        lastTemp3 = temperature3;
        if (!metric) {
          temperature3 = dht3.readTemperature(true);
        }

        send(msgTemp3.set(temperature3, 1));
        send(msgHum3.set(humidity3, 1));
      } else {
        send(msgTemp3.set(temperature3, 1));
        send(msgHum3.set(humidity3, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // ---- MOTION SENSOR START

  debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();

  if (valueA != oldValueA) {
    // Send in the new value
    send(msg_motion1.set(valueA == HIGH ? 1 : 0)); // Send tripped value to gw
    oldValueA = valueA;
    wait(5);
  }    

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();

  if (valueB != oldValueB) {
    // Send in the new value
    send(msg_motion2.set(valueB == HIGH ? 1 : 0)); // Send tripped value to gw
    oldValueB = valueB;
    wait(5);
  }  

 // --- MOTION SENSOR END
 
  if (!initialValueSent) {
    //Serial.println("Sending initial value");
    send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));
    //Serial.println("Requesting initial value from controller");

  // Reed Switch
    int value1 = debouncer_reed1.read();
    send(msgReed1.set(value1==HIGH ? 1 : 0));
    wait(5);

    request(CHILD_ID_RELAY1, V_STATUS);
    request(CHILD_ID_REED1, V_TRIPPED);
    
    wait(2000, C_SET, V_STATUS);

  }

  // Send locally attached sensor data here 
  if (debouncer.update()) {
    // Get the update value.
    int value = debouncer.read();
    // Send in the new value.
    if(value != oldValue){
         saveState(CHILD_ID_RELAY1, !loadState(CHILD_ID_RELAY1));
         digitalWrite(RELAY_PIN_1, loadState(CHILD_ID_RELAY1)?RELAY_ON:RELAY_OFF);
         send(msg.set(loadState(CHILD_ID_RELAY1)));
 
        oldValue = value;
    }
  }



   // Send locally attached sensor data here  
   if (debouncer_reed1.update()) {
      // reed
     // Get the update value
    int value = debouncer_reed1.read();
      if (value != oldValue) {
         // Send in the new value
         send(msgReed1.set(value==HIGH ? 1 : 0));
         oldValue = value;
      }
   }

      
}

void receive(const MyMessage &message) {
  if (message.isAck()) {
     //Serial.println("This is an ack from gateway");
  }

  if (message.type == V_STATUS) {
    if (!initialValueSent) {
      //Serial.println("Receiving initial value from controller");
      initialValueSent = true;
    }

    switch (message.sensor) {
      case CHILD_ID_RELAY1:
        loadedState1 =  message.getBool();
        digitalWrite(RELAY_PIN_1, loadedState1 ? RELAY_ON : RELAY_OFF);
        saveState(CHILD_ID_RELAY1, loadedState1);
        send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));
        break;

/*
      case CHILD_ID_RELAY2:
        loadedState2 = message.getBool();
        digitalWrite(RELAY_PIN_2, loadedState2 ? RELAY_ON : RELAY_OFF);
        saveState(CHILD_RELAY2, loadedState2);
        send(msg2.set(loadedState2?RELAY_ON:RELAY_OFF));
        break;
        */
    }
 /* Remove debug - not needed in Home Assistant
    // Write some debug info
    Serial.print("Incoming change for sensor:");
    Serial.print(message.sensor);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
*/

  }

}

Hi guys. Please help I struggle with this problem for a while. I searched the forum but I cannot find a solution that worked for me...
I've created one sketch that contains motion sensors, reeds, DHT22 and relays. Serial connection via USB. My goal is to have more sensors (but always from this 4 categories). This is a part of my Smart Home solution, so each DHT will be wired and placed on each room (my goal is to have at least 6 DHT's for one Arduino Mega).

Everything works fine - besides DHT22. I have 3 of them in the sketch. The first one works ok, but second and third don't fire.
When I use the same "fire time", like below:

unsigned long timeDHT1 = 30000; // 30 seconds
unsigned long timeDHT2 = 30000; // 30 seconds
unsigned long timeDHT3 = 30000; // 30 seconds

The system (i use Home Assistant but this is not important) shows 3 DHT's, but they have the same Temperature and Humidity (so the data comes for one DHT and copied it to DHT2 and 3).

When I change the times, for example

unsigned long timeDHT1 = 30000; // 30 seconds
unsigned long timeDHT2 = 31000; // 31 seconds
unsigned long timeDHT3 = 32000; // 32 seconds

The system update only the first DHT. 2nd and 3rd are visible, but they don't update. Please help. The sketch is below:

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

// Enable inclusion mode
#define MY_INCLUSION_MODE_FEATURE
// Enable Inclusion mode button on gateway
#define MY_INCLUSION_BUTTON_FEATURE

// Inverses behavior of inclusion button (if using external pullup)
//#define MY_INCLUSION_BUTTON_EXTERNAL_PULLUP

// Set inclusion mode duration (in seconds)
#define MY_INCLUSION_MODE_DURATION 60 
// Digital pin used for inclusion mode button
#define MY_INCLUSION_MODE_BUTTON_PIN  3 

#include <SPI.h>
#include <MySensors.h>  
#include <Bounce2.h>
#include <DHT.h> // DHT11, DHT22 sensors

// ------- PINS DEFINITION

// RELAYS
// Arduino Digital I/O pin number for first relay (second on pin+1 etc)
// Relay for first floor - 10 pcs (Przelaczniki SSR - pierwsze pietro)
#define RELAY_PIN_1 22

// Buttons for Relays - to use normal wall switches (Przyciski / laczniki scienne - pierwsze pietro)
#define BUTTON_PIN A0 

#define NUMBER_OF_RELAYS 10 // 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

// Arduino Digital I/O pin for button/reed switch
// Reeds 
#define REED_PIN_1 5


// PIR  SENSORS
uint32_t SLEEP_TIME = 1000; // 120000; // Sleep time between reports (in milliseconds)
#define DIGITAL_INPUT_SENSOR1 22   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
#define DIGITAL_INPUT_SENSOR2 23
#define SLEEP_NODE true

// DHT22
#define DHTPIN 4        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302), DHT11

#define DHTPIN2 24        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE2 DHT22   // DHT 22  (AM2302), DHT11

#define DHTPIN3 25        // Broche sur laquelle est branché le DHT / what pin we're connected to
#define DHTTYPE3 DHT22   // DHT 22  (AM2302), DHT11

// ------- Data for Motion sensor

int oldValueA = 0;
int oldValueB = 0;

bool stateA = false;
bool stateB = false;

unsigned long timeDHT1 = 30000; // 30 seconds
unsigned long timeDHT2 = 31000; // 30 seconds
unsigned long timeDHT3 = 32000; // 30 seconds

unsigned long actualTime = 0;
unsigned long recentTimeHum1 = 0;

unsigned long actualTime2 = 0;
unsigned long recentTimeHum2 = 0;

unsigned long actualTime3 = 0;

unsigned long recentTimeHum3 = 0;

// Initialize DHT sensor
float lastTemp;
float lastTemp2;
float lastTemp3;

float lastHum;
float lastHum2;
float lastHum3;

boolean metric = true;

// for reed switch
int oldValue=-1;

bool state = false;

// Relay for save state inside Arduino's EEPROM
bool loadedState1 = false;

bool initialValueSent = false;

// ------- CHILD IDs 

// REEDS
#define CHILD_ID_REED1 0   // Id of the sensor child

// Define CHILD_IDs
#define CHILD_ID_TEMP1 1 // Id of the sensor child
#define CHILD_ID_HUM1 2 // Id of the sensor child

#define CHILD_ID_MOTION1 3   // Id of the sensor child
#define CHILD_ID_MOTION2 4 // Id of the sensor child

#define CHILD_ID_RELAY1 5 // Id of the sensor child

#define CHILD_ID_TEMP2 6 // Id of the sensor child
#define CHILD_ID_HUM2 7 // Id of the sensor child

#define CHILD_ID_TEMP3 8 // Id of the sensor child
#define CHILD_ID_HUM3 9 // Id of the sensor child

// ------- 

void before()
{
  for (int sensor=1, pin=RELAY_PIN_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);
  }
}

// Reed switches needs debouncers
Bounce debouncer_reed1 = Bounce();

//Relays switched - don't need debouncers
Bounce debouncer_relay1 = Bounce();
Bounce debouncer = Bounce();

// Debouncer for Motion sensor
Bounce debouncerA = Bounce();
Bounce debouncerB = Bounce();

// Initialize Relay
MyMessage msg(CHILD_ID_RELAY1, V_STATUS);

// Initialize reed switches
MyMessage msgReed1(CHILD_ID_REED1, V_TRIPPED);


// Initialize DHT22
MyMessage msgTemp(CHILD_ID_TEMP1, V_TEMP);
MyMessage msgHum(CHILD_ID_HUM1, V_HUM);

MyMessage msgTemp2(CHILD_ID_TEMP2, V_TEMP);
MyMessage msgHum2(CHILD_ID_HUM2, V_HUM);

MyMessage msgTemp3(CHILD_ID_TEMP3, V_TEMP);
MyMessage msgHum3(CHILD_ID_HUM3, V_HUM);

// Initialize motion message
MyMessage msg_motion1(CHILD_ID_MOTION1, V_TRIPPED);
MyMessage msg_motion2(CHILD_ID_MOTION2, V_TRIPPED);


void setup() {

   // Setup locally attached sensors
  delay(100); 

   // Setup the button.
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  // After setting up the button, setup debouncer.
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(5);
  debouncer_relay1.attach(RELAY_PIN_1);
  debouncer_relay1.interval(5);
  // Setup the button
  pinMode(REED_PIN_1,INPUT_PULLUP);
  debouncer_reed1.attach(REED_PIN_1);
  debouncer_reed1.interval(10);
 
  // Make sure relays are off when starting up
  digitalWrite(RELAY_PIN_1, RELAY_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY_PIN_1, OUTPUT);

  // Set relay to last known state (using eeprom storage) 
  loadedState1 = loadState(CHILD_ID_RELAY1);

  
  // setup debouncer for Reed switch
  debouncer_reed1.attach(REED_PIN_1);
  debouncer_reed1.interval(5);

  pinMode(REED_PIN_1,INPUT);
  digitalWrite(REED_PIN_1,HIGH);

  // Setup PIR Motion sensor "button"
  pinMode(DIGITAL_INPUT_SENSOR1, INPUT_PULLUP); // Setup the button Activate internal pull-up
  pinMode(DIGITAL_INPUT_SENSOR2, INPUT_PULLUP); //  sets the motion sensor digital pin as input / Setup the button Activate internal pull-up
  
    // setup debouncer for motion sensor
  debouncerA.attach(DIGITAL_INPUT_SENSOR1);
  debouncerA.interval(5);

  debouncerB.attach(DIGITAL_INPUT_SENSOR2);
  debouncerB.interval(5);
  
}

void presentation()  {
  sendSketchInfo("Arduino5", "1.0");
  
  // Register all sensors to gw (gateway - they will be created as child devices)
  present(CHILD_ID_RELAY1, S_BINARY);
  
  present(CHILD_ID_REED1, S_DOOR);  

  present(CHILD_ID_TEMP1, S_TEMP);
  present(CHILD_ID_HUM1, S_HUM);
  
  present(CHILD_ID_TEMP2, S_TEMP);
  present(CHILD_ID_HUM2, S_HUM);
  
  present(CHILD_ID_TEMP3, S_TEMP);
  present(CHILD_ID_HUM3, S_HUM);  
  
  present(CHILD_ID_MOTION1, S_MOTION);
  present(CHILD_ID_MOTION2, S_MOTION);

}

void loop() {

actualTime = millis();

  // --- DHT22 SENSOR1 
  if (actualTime - recentTimeHum1 >= timeDHT1) {

    recentTimeHum1 = actualTime;
    // DHT sensor
    DHT dht(DHTPIN, DHTTYPE); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();
    if (isnan(temperature)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature != lastTemp) {
        lastTemp = temperature;
        if (!metric) {
          temperature = dht.readTemperature(true);
        }

        //Serial.print("T: ");
        //Serial.print(temperature);
        //Serial.print(" | H: ");
        //Serial.println(humidity);
        send(msgTemp.set(temperature, 1));
        send(msgHum.set(humidity, 1));
      } else {
        //Serial.println("Temperature doesn't change => don't update changes");
        //Serial.print("T: ");
        //Serial.print(temperature);
        //Serial.print(" | H: ");
        //Serial.println(humidity);
        send(msgTemp.set(temperature, 1));
        send(msgHum.set(humidity, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // --- DHT22 SENSOR2
  if (actualTime2 - recentTimeHum2 >= timeDHT2) {

    recentTimeHum2 = actualTime2;
    // DHT2 sensor
    DHT dht2(DHTPIN2, DHTTYPE2); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature2 = dht2.readTemperature();
    float humidity2 = dht2.readHumidity();
    if (isnan(temperature2)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature2 != lastTemp2) {
        lastTemp2 = temperature2;
        if (!metric) {
          temperature2 = dht2.readTemperature(true);
        }

        send(msgTemp2.set(temperature2, 1));
        send(msgHum2.set(humidity2, 1));
      } else {
        send(msgTemp2.set(temperature2, 1));
        send(msgHum2.set(humidity2, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // --- DHT22 SENSOR3
  if (actualTime3 - recentTimeHum3 >= timeDHT3) {

    recentTimeHum3 = actualTime3;
    // DHT3 sensor
    DHT dht3(DHTPIN3, DHTTYPE3); // Creation of a dht object in the loop otherwise the values are not measured on awakening
    float temperature3 = dht3.readTemperature();
    float humidity3 = dht3.readHumidity();
    if (isnan(temperature3)) {
      //Serial.println("Cannot read DHT temperature");
    } else {
      if (temperature3 != lastTemp3) {
        lastTemp3 = temperature3;
        if (!metric) {
          temperature3 = dht3.readTemperature(true);
        }

        send(msgTemp3.set(temperature3, 1));
        send(msgHum3.set(humidity3, 1));
      } else {
        send(msgTemp3.set(temperature3, 1));
        send(msgHum3.set(humidity3, 1));
      }
    }

  }    
  // --- DHT22 SENSOR END

  // ---- MOTION SENSOR START

  debouncerA.update();
  // Get the update value
  int valueA = debouncerA.read();

  if (valueA != oldValueA) {
    // Send in the new value
    send(msg_motion1.set(valueA == HIGH ? 1 : 0)); // Send tripped value to gw
    oldValueA = valueA;
    wait(5);
  }    

  debouncerB.update();
  // Get the update value
  int valueB = debouncerB.read();

  if (valueB != oldValueB) {
    // Send in the new value
    send(msg_motion2.set(valueB == HIGH ? 1 : 0)); // Send tripped value to gw
    oldValueB = valueB;
    wait(5);
  }  

 // --- MOTION SENSOR END
 
  if (!initialValueSent) {
    //Serial.println("Sending initial value");
    send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));
    //Serial.println("Requesting initial value from controller");

  // Reed Switch
    int value1 = debouncer_reed1.read();
    send(msgReed1.set(value1==HIGH ? 1 : 0));
    wait(5);

    request(CHILD_ID_RELAY1, V_STATUS);
    request(CHILD_ID_REED1, V_TRIPPED);
    
    wait(2000, C_SET, V_STATUS);

  }
  // Send locally attached sensor data here 
  if (debouncer.update()) {
    // Get the update value.
    int value = debouncer.read();
    // Send in the new value.
    if(value != oldValue){
         saveState(CHILD_ID_RELAY1, !loadState(CHILD_ID_RELAY1));
         digitalWrite(RELAY_PIN_1, loadState(CHILD_ID_RELAY1)?RELAY_ON:RELAY_OFF);
         send(msg.set(loadState(CHILD_ID_RELAY1)));
 
        oldValue = value;
    }
  }



   // Send locally attached sensor data here  
   if (debouncer_reed1.update()) {
      // reed
     // Get the update value
    int value = debouncer_reed1.read();
      if (value != oldValue) {
         // Send in the new value
         send(msgReed1.set(value==HIGH ? 1 : 0));
         oldValue = value;
      }
   }

      
}

void receive(const MyMessage &message) {
  if (message.isAck()) {
     //Serial.println("This is an ack from gateway");
  }

  if (message.type == V_STATUS) {
    if (!initialValueSent) {
      //Serial.println("Receiving initial value from controller");
      initialValueSent = true;
    }

    switch (message.sensor) {
      case CHILD_ID_RELAY1:
        loadedState1 =  message.getBool();
        digitalWrite(RELAY_PIN_1, loadedState1 ? RELAY_ON : RELAY_OFF);
        saveState(CHILD_ID_RELAY1, loadedState1);
        send(msg.set(loadedState1?RELAY_ON:RELAY_OFF));
        break;

/*
      case CHILD_ID_RELAY2:
        loadedState2 = message.getBool();
        digitalWrite(RELAY_PIN_2, loadedState2 ? RELAY_ON : RELAY_OFF);
        saveState(CHILD_RELAY2, loadedState2);
        send(msg2.set(loadedState2?RELAY_ON:RELAY_OFF));
        break;
        */
    }
 /* Remove debug - not needed in Home Assistant
    // Write some debug info
    Serial.print("Incoming change for sensor:");
    Serial.print(message.sensor);
    Serial.print(", New status: ");
    Serial.println(message.getBool());
*/

  }

}

Hi guys. I am beginner at Mysensors but I really enjoy this IoT idea. I would like to connect my Arduino with Mysensors sketch nto Home Assistant in Raspberry Pi. In Home Assistant there is a connection method done (I just need to add some code into my configuration.yaml file - https://www.home-assistant.io/components/mysensors).
Long story short... I have one relay for test and I try to use some sketchet. Unfortunately I cannto use any sketch, After connecting to Rpi it throws 2 warnings:
Not a valid message: not enough values to unpack (expected 5, got 0)
Error decoding message from gateway, bad data received: 8943007 TSF:TDI:TSL

And I have no sensors. What should I do? Maybe I need to create a serial gateway before connecting to USB? Please help I am totally noob in this subject.

P.S I didn't connect nothing to Arduino (no radion, just relay). Should I buy and use NRF24L01 or any other radio? Is this neccessary connecting via USB / Ethernet shield?