Wyze Wall switch - ESP8266 based?

Just googling around, I found that the wyze plug is ESP8266 based, meaning I can reflash it for my own MQTT setup and control it using my own software on a Rpi. Is the switch also ESP8266 based? I could buy one and tear it down, but wondering if anyone else has re-flashed it?

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I tore one down, have not attempted to flash as that is out of my range but you can see the innards here.