I2C slave arduino pro mini library
ESP8266 boards are great, specilly WeMos D1 board. But sometimes we need more I/O pins, analog inputs... What about using a cheap Arduino pro mini as a I2C slave?
This library communicates with an arduino I2C slave that offers:
- 6 Analog inputs
- A matrix keypad
- A rotatory encoder
- A led
Robotdyn offers one arduino pro mini running at 3.3V, but only at 8MHz. Enough for us! And in this model you can access A6 and A7 pins.
WORK in PROGRESS !