Hi !
This is a wall dimmer with touch controls.
I have several on the outside identical older units equipped with TYWE3S (ESP8266).
This one seem to be based on a LN822H module ?
It looks rather similar to the WL2H-U module but partly mirrored.
Anyway, 3.3V and GND are on the same pads (14 and 13).
And possibly RX/TX ? (16 and 15).
But the boot mode pad (A9) ? ("Top side test point" according to the WL2H-U spec).
Anyone have any idea ?
https://www.aliexpress.com/item/32980493334.html
AI: Do you have any clear photos of the LN822H module (both sides) or a datasheet that you could share?
Sorry, no photo from the bottom side (difficult to desolder).
AI: Have you already tried any methods to identify the A9 pad, like continuity testing or comparing PCB traces to the WL2H-U, and if so, what did you find?
Trial and error on the tiny traces visible on the top part would be my next step to find the boot-mode pad. But if anyone have any knowledge of this module that would be great.
This is a wall dimmer with touch controls.
I have several on the outside identical older units equipped with TYWE3S (ESP8266).
This one seem to be based on a LN822H module ?
It looks rather similar to the WL2H-U module but partly mirrored.
Anyway, 3.3V and GND are on the same pads (14 and 13).
And possibly RX/TX ? (16 and 15).
But the boot mode pad (A9) ? ("Top side test point" according to the WL2H-U spec).
Anyone have any idea ?
https://www.aliexpress.com/item/32980493334.html
AI: Do you have any clear photos of the LN822H module (both sides) or a datasheet that you could share?
Sorry, no photo from the bottom side (difficult to desolder).
AI: Have you already tried any methods to identify the A9 pad, like continuity testing or comparing PCB traces to the WL2H-U, and if so, what did you find?
Trial and error on the tiny traces visible on the top part would be my next step to find the boot-mode pad. But if anyone have any knowledge of this module that would be great.
