Can these be flashed with Tasmota?

I am planning on using this with HA instead of Sonoff since there are $1. Just wondering if anyone here has experience with these and HA. Or is the built in software already supported somehow? Thanks in advance.

As it has an esp8266 the answer is yes. Anyway, for a $ it could hardly hurt to try.

Whether it is safe for mains voltage is another matter. It is unclear what fusing and other protections it has.

The power supply for the esp is unclear. It seems to have a 5v or 3.3v input. Thus, unlike a sonoff, it is not entirely self powered.

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Good points. I will probably get one and also a couple sonoffs since they are $4 on ali express. Thanks.