OK, les pinoches associées sont :
The pins used for UART on the GIGA R1 are the following:
- RX0 - D0
- TX0 - D1
- RX1 - D19
- TX1 - D18
- RX2 - 17
- TX2 - 16
- RX3 - 15
- TX3 - 14
- Serial: communication over USB
- Serial1: communication on RX0/TX0
- Serial2: communication on RX1/TX1
- Serial3:communication on RX2/TX2
- Serial4: communication on RX3/TX3