How to restore Original_OTA_Xiaomi_LYWSD03MMC_v1.0.0_0130 on HW: B2

[skydiverscott]

I have a new set of Xiomi temp sensors. I am trying to hardware restore the original firmware since these have the new Xiaomi firmware but the prcoess an the page here is not working
https://pvvx.github.io/ATC_MiThermometer/USBCOMFlashTx.html
I have my ftdi usb connecting to
gnd
vcc 3.3v
and TX to P10
This worked with no problems on 2 of the sensors with HW B1.5 but the rest of these sensors have HW B2.

Does anyone have any suggestions on how to usb flash the original firmware onto this new hardware board?

[pvvx]

Same as with HW: B1.5.
TX to the pin marked P10.