ESP8266-12E, Arduino,3 in 1, Relay switch, + input state & temperature sensor LM35

Projects Made with Cayenne
1 
//##Easy plug & play cheap china esp8266-12E  with relay ouput , input state  & a cheap LM35 temperature sensor connected on pin ADC ##
// VE2VAX/va2nq  sept-2018
// exemple avec  un relai + un input + sonde temperature LM35 sur pin ADC
#include <CayenneMQTTESP8266.h>
#define CAYENNE_DEBUG
#define CAYENNE_PRINT serial     
#define DIGITAL_PIN 5       //INPUT SWITCH 

int inPin = 5;
int lm35 = 0;
int Clm35 = 0;
int vref = 1;   //analog voltage reference ( 1 volt ou 3.3 volts ) sur le esp8266-E12  c'est 1 volt

char ssid[] = "ve2vax";
char wifiPassword[] = "12345678";

char username[] = "3xxxxxx-xxxxxx-xxxxxxxxx";
char password[] = "5xxxxxxxxx-xxxxxxxxx-xxxxxxxxx";
char clientID[] = "xxxxx-xxxxxxxx-xxxxxxx-xxxx";

void setup() {
  // put your setup code here, to run once:
  Cayenne.begin(username, password, clientID, ssid, wifiPassword);
  pinMode(2, OUTPUT);
  digitalWrite(2, LOW);
  pinMode(5, INPUT_PULLUP); // pin input 
  

  pinMode(4, OUTPUT);
  digitalWrite(4, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  Cayenne.loop(); 
  delay(2500);     // # milli secondes de delais
}

// These functions are called when the Cayenne widget requests data for the Virtual Pin.
CAYENNE_OUT(0)
{
  int val = digitalRead(inPin);                      // read the input pin 
  Cayenne.virtualWrite(DIGITAL_PIN , val);
}

CAYENNE_OUT(1)
{
  float lm35 = (((vref * analogRead(A0) * 100.0) / 1023) - 1.3);  // read adc input pin LM35 = 10mv/C
        //  la valeur 1.3 est la valeur de correction de temperature
  Cayenne.virtualWrite(1 , lm35);
  
}
CAYENNE_IN(6)
{
  int currentValue = getValue.asInt();
  if (currentValue == 1)
  {
    //do whatever you want when you turn on the button on cayenne dashboard
    digitalWrite(2, HIGH);
  }
  else
  {
    //do whatever you want when you turn off the button on cayenne dashboard
    digitalWrite(2, LOW);
  }
}

CAYENNE_IN(8)
{
  int currentValue = getValue.asInt();
  if (currentValue == 1)
  {
    //do whatever you want when you turn on the button on cayenne dashboard
    digitalWrite(4, HIGH);
  }
  else
  {
    //do whatever you want when you turn off the button on cayenne dashboard
    digitalWrite(4, LOW);
  }
}
1 Like
2

Thanks for sharing this.
A suggestion you can delete the delay in the main loop.

3

Hi,

I want to try this project but i need your help.

Can you send me the schematic for this project, please?
I am new here and i dont know which pins to use for relay and LM35.

Waiting for your reply.

4

Here it is. lm35 is connected to A0 pin.

is the relay.