I’ve received the boards, soldered them up and flashed them with esphome. Thanks! They were super easy to integrate into hass too. So far so good.
I could power the boards up on the bench, and they’d connect to hass, however they wouldn’t power up when inserted into the fan controller. I suspect the older pre-tuya arlec fan controller boards I have don’t have the components populated to route from the J2 header over to the smarts:
The 6x1 SIL header you see on the board was crudely unsoldered from the J3 header visible in the bottom left, then straightened and soldered back on at J2. I read ground on J2 pin 1 (rightmost in this picture), but as far as I can tell it’s not getting 3.3V on VCC, based on there being no continuity between J2 pin 2 and the VCC pin on the 433MHz radio on the left of the board.
There’s a bunch of suspiciously empty pads just up from J2. I suspect on the non-gridconnect versions of this control board J2 is not usable in this way.
Do you happen to have any photos of your fan board disassembled, showing the PCB underneath the wifi daughterboard?
Cheers,
tjhowse.