Smart IR Remote WiFi Control - WB3/BK7231T - Teardown Photos

Hello, have you tried to change the firmware or make 2MB flash backup? We could use it to post the template.

Still, maybe we could trace the GPIO roles just from the photos, they are good quality.

It is interesting to see they used WB3S without shield.

Hi,
I just managed to backup firmware using BK7231 Easy UART flasher.
I connected TX, RX, 3.3V, and GND to CP2102 USB bridge.

In attachment, 2MB dump.

Also, it showed an error as the device seems not in the list.

After a successful dump, it seems I got a problem:
Whenever I connect both 3.3V and GND, the bridge USB interface resets as there seems to be a short circuit between the two lanes.
In particular, I can measure 2kOhm between 3.3V and GND, and 8kOhm between 5.0V and GND.
Not sure if these values are normal, but this prevents me from going on trying to flash OpenBeken firmware.

Edit:
After a number of attempts, I got UART working again and flashed OpenBeken firmware successfully. Now I'm going to struggle with the configuration/template to have IR working.

Edit2:
I used the configuration from this module: https://www.elektroda.com/rtvforum/viewtopic.php?p=20238985#20238985 and got IR-Receive working.
I can confirm for now that:
P6: Btn (tested with GPIO tester)
P8: IRRecv (tested with console info)
P9: LED (tested with GPIO tester)

To be confirmed:
P26: IRSend

I tried to send a command as I receive and nothing happens on devices. Tested an LED strip ON/OFF button (received Info:IR:IR IR_NEC 0xEF00 0x3 1) and an LG Soundbar vol+ button (Info:IR:IR IR_SamsungLG 0x2C2C 0x17 1).
Sending Console command "IRSend IR_SamsungLG-2C2C-17-1" results in "ok" in the console but no effect.
Am I missing something?

Recently updated via OTA to the latest available firmware and now successfully received and sent IR messages with the mentioned pinout:

6: Btn
8: IRRecv
9: LED
26: IRSend

The utilized firmware is: 1.17.226

Now integrating into HA MQTT stuff.