Thanks! I've never had this spelled out to me before and its always been kinda' a mystery/blind spot.
-jim lee
The most common issue with serial ports on Teensy is use of code designed for Arduino Uno with Serial within the code. On Teensy, Serial accesses the USB. For hardware serial ports, Serial1, Serial2, Serial3, Serial4, Serial5, Serial6, Serial7 or Serial8 must be used.
The most common issue with serial ports on Teensy is use of code designed for Arduino Uno with Serial within the code. On Teensy, Serial accesses the USB only. USB and Serial1 (pins 0 & 1) are not shared on Teensy. For hardware serial ports, Serial1, Serial2, Serial3, Serial4, Serial5, Serial6, Serial7 or Serial8 must be used.
Hopefully this will make it clearer in the future.