Arduino and GY_21P sensor data to Thingspeak example
In this example we connect an Ethernet shield to an Arduino, we then connect a GY-21P sensor to this and we will send the values to Thingspeak
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BMP280
Wemos Lolin 32 ESP32 module and GY-21P module
The GY-21P is a module in that combines a BMP280 sensor and an SI7021 sensor. The on-board BMP280+SI7021 sensor measures atmospheric pressure from 30kPa to 110kPa as well as relative humidity and temperature.