// simple bridge between Raspberry Pi Pico's // serial 1 and serial 2 #define S2_TX 8 // GP8, actual pin 11 #define S2_RX 9 // GP9, actual pin 12 UART Serial2(S2_TX,S2_RX,0,0); void setup() { Serial.begin(9600); Serial2.begin(9600); } void loop() { while (Serial2.available() > 0) { Serial.print(Serial2.readString()); delay(10); } while (Serial.available() > 0) { Serial2.print(Serial.readString()); delay(10); } }