PIN Layout ESP32-S3 about espsomfy-rts HOT 4 CLOSED

You can use any of the pins in the Usable I/O pins but I would avoid any of them that have a note next to them. For instance if it indicates that it is a strapping pin, or it has a pull up/down, or it is used for some other peripheral. Each board maker tweaks this list to support the features they have on the board.

Here are the pins that I used on the mini https://github.com/rstrouse/ESPSomfy-RTS/wiki/Mini-ESP32s3-Device-Build. While GPIO4 has a weak pull up on reset it should not affect the operation of the RX pin in this case. I used it because of the limited number of exposed pins on the mini.

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Okay, Thanks. But maybe a stupid question, how does the software now the correct pins? Or do I need to config them somewhere

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On the configuration pages select the radio section then the transceiver tab. From there you define the pins that you used for each of the functions of the transceiver.

EDIT: Here is the wiki on setting up the transceiver.
https://github.com/rstrouse/ESPSomfy-RTS/wiki/Configuring-the-Software#set-up-the-transceiver

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Thank you 👍

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