Hello friends, I hope you are well.
I am a beginner in programming with arduino ide language,
I connected a heltec card with four sensors (MQ-7, MQ-2, floor sensor and temperature sensor and humidity), but I need someone to help me write the arduino code.
cordially.
Internet of Things
MQ-7 and MQ-2 are analog data output sensor, you can refer to those samples:
I know for sure pins 32, 36, 38, 39 all support Analog to Digital Conversion.
#include “Wire.h”
#include “Heltec.h”
#define adcMQ7 32
void setup() {
pinMode(adcMQ7, INPUT);
//other code
}
void loop() {
float a;
a = analogRead(adcMQ7);
//however you want to output to serial or oled display
}