Wall touch cct led controller - capacitive touch mcu

[Muszek96]

I am looking for any datasheet for mi-light p2 touch switch capacitive touch mcu. It's connected by I2C to other mcu - STM8S003F3P6 witch drives mosfets etc. I was able to connect to it with arduino and after I2C scan I got it's adress - 0x53, the pins are 10 - gnd, 9 - Vin, 10 - sck, 11 - sda and 8 output's low when sensor is touched. I am trying to use this wall touch switch to controll light's trough wifi, that's why I want to 'talk' with mcu by it's i2c bus. The mcu itself hasn't any markings on it.

 

[rjenkinsgb]

This is the only one I can find so far that matches the 20 pin package - see if the pinouts match up?

https://www.mouser.co.uk/datasheet/2/268/doc9634-1369146.pdf

Edit - found another, again not quite the correct address though..

https://www.nxp.com/docs/en/data-sheet/MPR121.pdf

 

[Muszek96]

Unfortunately it's not any of these. Anyway I have done i2c sniffing to read what data STM8S003F3P6 sends to this mcu and I got all register values from there. Successfully I got it working after sending this values from Arduino as I2C master.
That's what was sniffed from master mcu:

[A6+C0+00+04+17+00+]
[A6+C1+00+04+17+00+]
[A6+C2+00+04+17+00+]
[A6+C3+00+04+17+00+]
[A6+C4+00+04+17+00+]
[A6+C5+00+04+17+00+]
[A6+C6+00+04+2A+00+]
[A6+C7+00+04+24+00+]
[A6+C8+00+04+24+00+]
[A6+C9+00+04+24+00+]
[A6+CA+00+04+32+00+]
[A6+CB+00+04+1A+00+]
[A6+CC+00+04+1A+00+]
[A6+CD+00+04+1A+00+]
[A6+CE+00+04+2F+00+]
[A6+CF+00+04+2F+00+]
[A6+D0+00+02+05+00+]
[A6+E0+00+00+00+00+]
[A6+91+22+25+86+]

Mcu sends back 5 bytes response. Maybe somebody could use this informations to find right datasheet.

[A7+02+00+08+00+00-]
[A7+02+00+00+00+00-]
[A7+02+00+04+00+00-]
[A7+02+00+00+00+00-]
[A7+02+00+02+00+00-]
[A7+02+00+00+00+00-]
[A7+02+00+01+00+00-]
[A7+02+00+00+00+00-]
[A7+02+00+10+00+00-]