MQ-2 gas sensor readings all wrong on Photon but on Arduino its reading fine?

[ScruffR]

You also already got told in this thread that this is not the way to write this!

Particle Serial timing out, not detecting cloud variables. Serial output not showing anything

Regardless, that’s not how you should declare variables, and although it might work now, it’ll give you more problems than its worth later on. Please consider switching to the thoughtful suggestions made above.

void loop() {
    valorSensor = analogRead(sensorPin);
    Serial.println(valorSensor);
    Particle.variable("valorSensor", valorSensor); // <-- DON'T DO THIS!!!
    delay(1000); //wait for a minute to see if no more gas is being detected (make it 10 for testing without having to wait a whole minute everytime)
    gasAlarm();
}