265 B
265 B
Documentation
1.0 Keypad
The kepad is driven by an io-expander. Thus it can be acessed over i2c. Adress 0x21
1.1 Wiring
- Red: 3.3V
- Black GND
- Green SDA -> D3
- Grey SCL -> D4
2.0 LCD
The LCD display is driven on the same i2c bus as the keypad.