Esp32 UART grounding problem

Posts: 1
Joined: Fri Apr 12, 2019 10:47 am

Esp32 UART grounding problem

Postby KimKim » Fri Apr 12, 2019 10:54 am

We have a very strange problem.

We have connected Teensy 3.2 board (3.3V levels) Tx, Rx and GND to ESP32 development board. and made simple communication test SW.

The communication fails, except it work if we disconnect ground and power Esp32 from battery. i.e. only Rx and Tx connected.

How is this possible? and why is it not working when GND is connected?

Posts: 55
Joined: Tue Jun 26, 2018 3:09 am

Re: Esp32 UART grounding problem

Postby ESP_houwenxiang » Wed Apr 17, 2019 9:27 am

Hi, KimKim
Has this problem been solved? If not, can you provide a picture showing how you connect the two boards and the battery?

thanks !!

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