Well, this would have been an easy convert from Tuya to esphome, but just as I was taking the programmed wb2s off the test rig I think it got fried. I had previously put the device in the scrap bin and replaced it with a ESP-05. However, this wouldn't play - I've had problems with all of these devices in that batch.
Aliexpress had a compatible looking ESP-02s for 1.65€ so that got my vote. Usual gp0 to 0v, reset, program with esphome.
button 14
relay 12
led 4
The pcb is marked with these numbers, even though a wb2s was fitted (wb2s IO was P26/P24/P7 respectively)
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