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Well. I went the other way, I bought known compatible devices. In my case the inofficial name is "OBI socket 2", from the (German) OBI home improvement store. It's about 10€ a piece.

That said, if your device is based on some kind of Espressif ESP32 module, you might be able to find the right four pins on the circuit board and find or cobble together a configuration to talk to the I/O ports. Hardware required is a (usually USB) RS232 interface at 3.3 volts, some medium-thin cables, screwdriver, soldering iron, probably multimeter to check things. The firmware flashing and WiFi setup are fairly independent of the I/O port configuration, so you can flash something that can bring up the WiFi connection and web interface and experiment from there.




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