Teensy 4.0/4.1 to ESP32 via Rx & Tx HARDWARE question


New member
Heyya! I'm trying to connect a Teensy 4.1 to an ESP32 -- mainly to send data from Teensy to ESP32, and then over to my computer. There are multiple RX and TX pins on both boards -- I was wondering which to use, if there are any other hardware connections that i have to consider, and if anyone has any suggestions; I'm quite a newbie to this world. The two will be in the same box. Thanks!
Usually best to use RX1 and TX1 (pins 0 and 1). Any of the others can also work, just make sure you use the connect name rather than Serial1.

Don't forget to also connect GND between the boards.