Hi, i was searching for wall switches spanning two installation boxes. I found some retailers on ali (aseer, avatto), i asked them about chip. It seems, it is not esp based. One of them replied , they use “gaotuo a6431” , other one send me picture of pcb, it says “KingArt SmartSwitch v2020” and on the chip, i can also read “6431”. It seems, those non-esp chips are becoming more common now, isn’t it?