Arlec PC191BKHA Series 3 Smart Plug (PC191-A4-G, CB2S, BK7231N, BL0937) - Teardown and Json

Hi,

Just sharing a confirmed working template for the Arlec PC191BKHA Series 3 smart plugs with energy monitoring (Australian plug from Bunnings). They can be quite cheap. Picked them up awhile ago now, and never got around to uploading. Also, there is another Series 3 teardown that is for a slightly different version, but pins still seem to match and opening the case is the same (Series 3 HA model not BKHA).



Ran a bit warm, so set up the power save settings and spaced out MQTT timings.
Power monitoring via BL0937 is working correctly.
Tested using OpenBeken with stable MQTT Home Assistant setup.

Model: Arlec PC191BKHA Series 3
Main Board: PC191-A4-G
Tuya Board: CB2S (BK7231N)
Energy Monitoring Chip: BL0937

Pin mapping:
P6 - BL0937 CF1
P7 - BL0937 CF
P8 - Relay
P10 - WiFi LED
P11 - Button
P24 - BL0937 SEL
P26 - LED

JSON Template



If anyone else has this same board revision, this should save a bit of trial and error.

Cheers,

nice.

device list add: https://github.com/OpenBekenIOT/webapp/pull/2...nges/4803f30cc15cc598dc053eeb673ac3e1b31a95cf

This device has two relays, so it cuts off both L and N? That's impressive. I very rarely see such devices.