// this code is for Teensy 4.1 to read serial data and relay it to serial 1(computer) #include int incomingbyte = 0; void setup() { Serial.begin(9600); Serial1.begin(9600); Serial.print("Starting ...."); } void loop() { if (Serial1.available() > 0) { incomingbyte = Serial1.read(); Serial.print(char(incomingbyte)); } milis(1); }