I am using MQ135 gas sensor and ESP8266 nodeMCU with Blynk App to detect smoke, which should notify on my app if the value sensed exceeds 600. The sensor is able to sense values but my app does not get notified.
I am using the circuit and instructions in this link.
Code for reference:
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
//#include <SimpleTimer.h>
#define BLYNK_PRINT Serial // Comment this out to disable prints and save space
char auth[] = "***************";
/* WiFi credentials */
char ssid[] = "*************";
char pass[] = "*************";
BlynkTimer timer;
int mq135 = A0; // smoke sensor is connected with the analog pin A0
int data = 0;
void setup()
{
Serial.begin(115200);
Blynk.begin(auth, ssid, pass);
timer.setInterval(1000L, getSendData);
}
void loop()
{
timer.run(); // Initiates SimpleTimer
Blynk.run();
}
void getSendData()
{
data = analogRead(mq135);
Blynk.virtualWrite(V2, data); //virtual pin V3
if (data > 600)
{
Blynk.notify("Smoke Detected!!!");
}
}