dht22 with relay irregular measurement and operation

[Dick]

Double dht22 with relay is working good but the 2 DHT's give logging irregular
H1= 50.20
H0= 75.70
H0= 75.80
T1= 23.90
H1= 50.30
T0= 21.40
H0= 75.70
T0= 21.50
H0= 75.90
T0= 21.40
H0= 75.80

is it possible to measure in an sequence? Also the relay cannot be used by the button everytime I like, also immediate after the measurement it can be used. is there something wrong in the delay?
Here the code as it is now

#include <SPI.h>
#include <MySensor.h>
#include <DHT.h>
#include <Bounce2.h>

#define CHILD_ID_HUM1 0
#define CHILD_ID_HUM2 1
#define CHILD_ID_TEMP1 3
#define CHILD_ID_TEMP2 4

// RelayWithActuator stuff
#define RELAY_PIN  6  // Arduino Digital I/O pin number for relay 
#define BUTTON_PIN  7  // Arduino Digital I/O pin number for button 
#define CHILD_ID 5   // Id of the sensor child
#define RELAY_ON 1
#define RELAY_OFF 0
Bounce debouncer = Bounce(); 
bool state;
MySensor gw;
MyMessage msg(CHILD_ID,V_LIGHT);

#define HEARTBEAT       10
unsigned int     timer = 0;
// Sleep time between reads (in milliseconds)
#define SLEEP_TIME      3000 

DHT* dht[2];
byte sensorPin[2] = {3, 4};
float lastTemp[2] = {0.0, 0.0};
float lastHum[2] = {0.0, 0.0};

boolean metric = true;
//MyMessage msgHum(CHILD_ID_HUM1, V_HUM);
//MyMessage msgTemp(CHILD_ID_TEMP1, V_TEMP);

void setup()
{
  gw.begin(incomingMessage, AUTO, true);
  for (int i = 0; i < 2; i++)
  {
    dht[i] = new DHT;
    dht[i]->setup(sensorPin[i]);
  }

  gw.sendSketchInfo("HumidityAndRelay", "1.0");

  gw.present(CHILD_ID_HUM1, S_HUM);
  gw.present(CHILD_ID_HUM2, S_HUM);
  gw.present(CHILD_ID_TEMP1, S_TEMP);
  gw.present(CHILD_ID_TEMP1, S_TEMP);

   // Setup the button and Activate internal pull-up
  pinMode(BUTTON_PIN,INPUT_PULLUP);
  
  // After setting up the button, setup debouncer
  debouncer.attach(BUTTON_PIN);
  debouncer.interval(5);

  // Register all sensors to gw (they will be created as child devices)
  gw.present(CHILD_ID, S_LIGHT);

  // Make sure relays are off when starting up
  digitalWrite(RELAY_PIN, RELAY_OFF);
  // Then set relay pins in output mode
  pinMode(RELAY_PIN, OUTPUT);   
      
  // Set relay to last known state (using eeprom storage) 
  state = gw.loadState(CHILD_ID);
  digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
 
  timer = 0;
  metric = gw.getConfig().isMetric;
}

void loop()
{
  gw.process(); 
  timer++;
  
  if (timer > (SLEEP_TIME / HEARTBEAT))   
  { 
    // Reset timer again and for the next timed loop
    timer = 0;
    for (int i = 0; i < 2; 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(msgTemp.set(temperature, i));
        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(msgHum.set(humidity, 1));
        Serial.print(F("H"));
        Serial.print(i);
        Serial.print(F("= "));
        Serial.println(humidity);
      }
    }
  } 
  
  // Get the button update state (true if a change was detected) 
  if (debouncer.update() && debouncer.read() == 0) {
      gw.send(msg.set(state?false:true), true); // Send new state and request ack back
  }
  
  gw.wait(HEARTBEAT); //sleep a bit
}

void incomingMessage(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.isAck()) {
     Serial.println("This is an ack from gateway");
  }

  if (message.type == V_LIGHT) {
     // Change relay state
     state = message.getBool();
     digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
     // Store state in eeprom
     gw.saveState(CHILD_ID, state);
    
     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.getBool());
   } 
}

[Dick]

somebody any suggestions?

[gundark2]

So I'm new to all this, however anytime I get funky things going on when I have multiple sensors on a node I found that introducing a delay in between the readings helped smooth things out. Hopefully someone will correct me if I'm wrong, but I have had some luck with delays. Also I built one to control my hot tub and I found noise from the pump messed things up, de-coupling capacitors became my friend after that.