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Add Bluetooth to Arduino and ESP8266 easily using RYB2340 module

I’ve been testing out the RYB2340 Bluetooth module, and it’s honestly one of the simplest ways I’ve found to add wireless ...
GitHub

We present a unified library for MQ sensors, this library allows to read MQ signals easily from Arduino, Genuino, ESP8266, ESP-32 boards whose references are MQ2, MQ3, MQ4, MQ5 ...

//Include the library #include <MQUnifiedsensor.h> /*****Hardware Related Macros*****/ #define Board ("Arduino UNO") #define Pin (A4) //Analog input 4 of your arduino ...