mega --- couner ----> uno
mega <-- OK ----- uno
UNO | MEGA | LCD | Description |
---|---|---|---|
0(RX) | 14(TX3) | UART | |
1(TX) | 15(RX3) | UART | |
GND | GND | LCD-MEGA | |
5V | VCC | LCD-MEGA | |
20(SDA) | SDA | LCD-MEGA | |
21(SCL) | SCL | LCD-MEGA | |
GND | GND | LCD-UNO | |
5V | VCC | LCD-UNO | |
A4 | SDA | LCD-UNO | |
A5 | SCL | LCD-UNO |