ESP32 Forum

I'm developing a board using ESP32-Wrover-E in which it is running out of available GPIOs.
So, I was wondering if I could use its GPIO 34 (input only) as a RX for the TX of the GPS module (L76L-M33).

Is that possible? Should I use a pull-up resistor?

Should be possible. If you need a pullup depends on the GPS module or not.

ESP_Sprite wrote: ↑

Wed Aug 14, 2024 5:06 am

Should be possible. If you need a pullup depends on the GPS module or not.

Thank you so much, ESP_Sprite. I've tested it using a NEO-6M yesterday and it works. I'm contacting the Quectel team to be sure about the pullup.

In case you don't get a response - it's not likely you need a pullup but if you design in one with a high enough value (e.g. 10K) it won't hurt either.