Trigger doesn't work

Community Help With My Project Helped
1

hi , I’m trying to use PIR to automatically switch on my relay but it isnt working .im using two nodemcu ESP01, one node for my pir and the second for my relay.
the code for the pir:

#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>

// WiFi network info.
char ssid[] = "M";
char wifiPassword[] = "e";

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";

int inputPin = 15;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status
int pinSpeaker = 13;           //Set up a speaker on a PWM pin (digital 9, 10, or 11)


void setup() {
  pinMode(inputPin, INPUT);     // declare sensor as input
  pinMode(pinSpeaker, OUTPUT);
  Serial.begin(115200);

  Cayenne.begin(username, password, clientID, ssid, wifiPassword);  
}

void loop() {
  Cayenne.loop();

  val = digitalRead(inputPin);  // read input value
  if (val == LOW) {            // check if the input is HIGH
    playTone(1000, 160);
//    Serial.println("BUZZER ON");
    delay(50);

    
    if (pirState == HIGH) {
      // we have just turned on
     Serial.println("Motion DETECTED!");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
  else {
    playTone(0, 0);
    delay(20000);

   if (pirState == LOW){
  // we have just turned ON
    Serial.println("Motion ENDED!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  }
}
// duration in mSecs, frequency in hertz
void playTone(long duration, int freq) {
    duration *= 1000;
    int period = (1.0 / freq) * 1000000;
    long elapsed_time = 0;
    while (elapsed_time < duration) {
        digitalWrite(pinSpeaker,HIGH);
        delayMicroseconds(period / 2);
        digitalWrite(pinSpeaker, LOW);
        delayMicroseconds(period / 2);
        elapsed_time += (period);
    }
}
    CAYENNE_OUT_DEFAULT()
    
{
  Cayenne.virtualWrite(0, val, "motion", "d");
 
  }

the code for the relay;

#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>

int relayPin = 4;     // relay pin D2


// WiFi network info.
char ssid[] = "M";
char wifiPassword[] = "e";

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";

void setup() {
  pinMode(D2, OUTPUT);
 
  Serial.begin(115200);

  Cayenne.begin(username, password, clientID, ssid, wifiPassword);
}

void loop() {
   Cayenne.loop();
 digitalWrite(D2, LOW);
  /* digitalWrite(pinOut, LOW);
  delay(2000);
  digitalWrite(pinOut, HIGH);
  delay(25000);
 */

}
CAYENNE_IN(1)
{
  digitalWrite(D2, getValue.asInt());
  }

I’m new at programming , pls go through this

2

pls send a reply as soon as possible .thanks

3

is your trigger counter on dashboard incrementing?

4

You have delays that are far too long. All delays in loop should never add up to more than 1000. Also, you have in your relay code automatically turning on (or off depending on your relay) the relay:

void loop() {
   Cayenne.loop();
 digitalWrite(D2, LOW);
  /* digitalWrite(pinOut, LOW);
  delay(2000);
  digitalWrite(pinOut, HIGH);
  delay(25000);
 */

}

Was that intentional?

5

Yes

6

what does this part of your code does?

void loop() {
   Cayenne.loop();
 digitalWrite(D2, LOW);
  /* digitalWrite(pinOut, LOW);
  delay(2000);
  digitalWrite(pinOut, HIGH);
  delay(25000);
 */

}
CAYENNE_IN(1)
{
  digitalWrite(D2, getValue.asInt());
  }
7

its supposed to turn the relay on and off, but how can I use my pir to trigger my relay
I’m using two nodemcu for my project , one for the pie and on for the relay

8

but above code will always keep your led OFF, while will turn ON for very very little time. as once it is turn in

CAYENNE_IN(1)
{
  digitalWrite(D2, getValue.asInt());
  }

it will always turn OFF in main loop.

void loop() {
   Cayenne.loop();
 digitalWrite(D2, LOW);

so try this code and see if you trigger is working or not.

#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>

int relayPin = 4;     // relay pin D2


// WiFi network info.
char ssid[] = "M";
char wifiPassword[] = "e";

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";

void setup() {
  pinMode(D2, OUTPUT);
 
  Serial.begin(115200);

  Cayenne.begin(username, password, clientID, ssid, wifiPassword);
}

void loop() {
   Cayenne.loop();
}
CAYENNE_IN(1)
{
 Serial.println("trigger activated");
  }

open your serial monitor and check whether you are receiving the value on channel 1 when the trigger is activated. also you might want to change your code for PIR based on this Sending MQTT messages within notification limit or else you will hit the trigger limit for notification and it will stop,

1 Like
9

okay , I will try this and sen a feedback , thanks…

1 Like
10

thanks, my relay can now be triggered by cayenne…
thank you

11

I added this
}
CAYENNE_IN(1)
{delay(5000);
digitalWrite(relayPin, !getValue.asInt());
Serial.println(“trigger activated”);

}

12

you should not use a delay in your code. try using millis() instead.