Hi
I’ve been trying to put together a code to make the relay, DHT11 sensor and the current sensor work together in the Cayenne dashboard but I could not get the relay to do it’s job. Can someone please help me to figure out what is wrong thanks.
I’ve used the following parts:
Arduino UNO
W5200 ethernet shield
DHT11
100A SCT-013-000 Current sensor
Arduino relay
[code]
/*
* Pump control
*/
#define CAYENNE_PRINT Serial
#include <CayenneMQTTEthernetW5200.h>
// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";
//Current sensor
#include "EmonLib.h"
// Sensor Calibrations
const int volt = 220;
const float ct_calibration = 30; // 29 default
const int currentSensorPin = A2;
float Irms = 0;
// Create an Emon instance
EnergyMonitor emon1;
//DHT11
#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT11 // DHT 11
// Virtual Pin of the widget.
#define VIRTUAL_PIN V2
DHT dht(DHTPIN, DHTTYPE);
//Relay
//#define SDCARD_CS 4
#define RELAY_PIN 4
#define VIRTUAL_PIN V5
unsigned long lastMillis = 0;
void setup()
{
Serial.begin(9600);
Cayenne.begin(username, password, clientID);
emon1.current(currentSensorPin, ct_calibration);
emon1.current(1, 111.1); // Current: input pin, calibration.
//pinMode(SDCARD_CS, OUTPUT);
//digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card
// set digital pin to output
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
}
CAYENNE_IN(V5)
{
// get value sent from dashboard
int currentValue = getValue.asInt(); // 0 to 1
//float d = getValue.asInt();
// assuming you wire your relay as normally open
if (currentValue == 0)
{
digitalWrite(4, HIGH);
Cayenne.virtualWrite(V5, HIGH); //virtual pin
}
else
{
digitalWrite(4, LOW);
Cayenne.virtualWrite(V5, LOW); //virtual pin
}
}
void loop()
{
Cayenne.loop();
double Irms = emon1.calcIrms(1480); // Calculate Irms only
//Publish data every 10 seconds (10000 milliseconds). Change this value to publish at a different interval.
if (millis() - lastMillis > 5000)
{
lastMillis = millis();
//Write data to Cayenne here. This example just sends the current uptime in milliseconds.
//Current sensor
Cayenne.virtualWrite(0, lastMillis);
Cayenne.virtualWrite(1, Irms*volt);
Cayenne.virtualWrite(2, Irms);
//Humidity
float h = dht.readHumidity();
Cayenne.virtualWrite(4, h); //virtual pin
//Temperature
float t = dht.readTemperature();
Cayenne.virtualWrite(3, t); //virtual pin
}
}
[/code]
