hardware serial pin available ?

[Skywalkerf34]

Hi Pascal,

Thanks for this library, I compile example then port to my program with ESP32 C3 chip and to work like a charm Next question is does it give me the two pin (RxTx) free for other purpose ?

Happy new year

[Invzblio]

Happy new year to you too!

There is a way you can use both SerialToWifi AND the standard Serial library. You will loose the ability to easilly switch from one to the other though. You first need to redefine the Serial class right after the library declaration by using

define Serial Serial

This might generate a compilation warning, simply ignore it

Then, in order to use the SerialToWifi library, use the serialToWifi class instead of Serial like serialToWifi.begin(115200); serialToWifi.println("starting wifi");

in parallel, you'll still be able to use tx/rx pins through the Serial commands. I attached a sample .ino file demonstrating this.

Hope this helps!

Pascal

swifi.zip

[Skywalkerf34]

Hi Pascal,

thanks for this prompt reply to help I didn't explain correctly my need : What I want is to use those GPIO for other purpose than serial because I already use all for my design except those RxTx pins as I am using those for debug/tracing but not for production (this is kind of IOT project)

Rgds

Francis

[Invzblio]

Hi Francis, I wouldn't recommend going that route as decribed in this reddit post: https://www.reddit.com/r/esp32/comments/qdo2cv/can_i_use_rx_and_tx_as_gpio/

If you absolutely can't do otherwise, test it and see if it works with your exact situation. Hope this helps!

Pascal

[Skywalkerf34]

@Invzblio Thanks for the recommendation, but I have already done that for other projects before the only problem is the is some signal going out Tx at boot for very few seconds before running Firmware, so have to be careful and not use this Tx pin for launching a Rocket ;-)

[Invzblio]

So I guess that answers your initial question! The pins are free as long as you don't comment out the SerialToWifi.h include statement.