Need help identifying wifi module

[dx136]

I'm looking for help to identify the module and thus the pinout (for flashing) for the wifi module in a EARU EAKCB-EWE-M "circuit breaker" that I just bought off AliExpress. I've verified that it works with ewelink so I'm hoping I can make it work with Tasmota. I'm attaching pictures of the front and back of the circuit board containing the wifi module.

FRONT of circuit board (Wifi module circled in red)

BACK of circuit board

The only marking I see is "PTBLU-W" in the silkscreen and searching the web comes up empty. There are no markings on the RF shield no matter which angle I look at it. Based on a post I found, I was hoping it would be the PSF-B module mentioned in: https://www.elektroda.com/rtvforum/topic4068651.html but no such luck.

I'd use a sonoff device, but they generally have a current limit around 20A or less (for a single channel); I need to monitor and control a higher current (30-35A for my EV) and this has a relay rated for 60A.

Thanks in advance for any help you can offer.

[sfromis]

It is certainly not PSF-B.

You could try a Wifi analyzer tool while you have the thing in pairing mode, and lookup the MAC on a site like macvendors.com. Only Tasmota-compatible if Espressif.

Still, this thread has a very similar board with same form factor Wifi module labeled "CBU", which should have the MCU Beken BK7231N.
https://www.elektroda.com/rtvforum/topic4000643.html
https://developer.tuya.com/en/docs/iot/cbu-module-datasheet

[HofeBY2]

https://github.com/openshwprojects/OpenBK7231T_App