transmitter -> 12
magnetic SDA -> SDA
magnetic SCL -> SCL
- https://github.com/PaulStoffregen/RadioHead
- https://github.com/adafruit/Adafruit_HMC5883_Unified
- https://github.com/adafruit/Adafruit_Sensor
LCD --> 7,6,5,4,3,2
receiver -> 11
transmitter -> 12
magnetic SDA -> SDA
magnetic SCL -> SCL
LCD --> 7,6,5,4,3,2
receiver -> 11