[BK7231N] AUBESS Power Monitor Switch - Setting Up Power Measurement Channel

I bought this AUBESS "Power Monitor Switch"

I umounted it, founding a BK7231N
Connected 3.3V, GND, TX, RX under the small board

Backed up using BK7231Flasher , and then flashed latest openBK

Following the found json
Device configuration, as extracted from Tuya:
- Pair/Toggle All Button on P23  => it's the board button, P23 = ADC3 https://docs.libretiny.eu/boards/cb2s/#pinout
- WiFi LED on P8     => that's right
- TglChannelToggle (channel 1) on P24  => it's the S1/S2 switch
- Relay (channel 1) on P26  => right
Device seems to be using CB2S module, which is using BK7231N.
And the Tuya section starts, as usual, at 2023424

How can i find and setup the channel for the power measurement?
Attached some photos, do you need other infos?

Thanks

BL0942 is always using UART1 for communication. You need to enter:
in your either autoexec.bat or short startup command. Then reboot. Then you need to calibrate, like you'd do in Tasmota. VoltageSet/CurrentSet/PowerSet commands.

For this kind of device, you also might need to enable PowerSave 1 so the device capacitors can last longer.

Thanks for the info, so it's used a BL0942 and it communicates with the same TX/RX used for flashing.

Can you provide a guide or a link where I can deepen how to calibrate it?

At the end I want to flash espHome as I did in other devices without power metering, do you know if it's possible to read the current using it?

When you write "this kind of devices" do you mean I should check also my other espHome DIY switch to enable some kind of low power mode? Example >>21126030

Thanks

I flashed another identical device, and i have many questions:

1. S1-S2 switch gives me problems. P24 is TglChnOnTgl but when let unconnected it randomly double toggle (like 1 time every 3 seconds). Switch usually off but relay turns on and off very fast because of that false signal. If i short circuit S1 S2 the relay remains stable, but if I open S1 S2 it starts ticking again. I found a stable 3.3V between S1 and S2
2. I wrote on startup_command "powersave 1; startDriver BL0942" but idk where I can read the power consumption. I tried to calibrate the device having this message


If i go to the console and I write "startDriver BL0942" than I start having "Last status: OK (200)!"
PS: when I enable the driver I also can read the measure, so why it doesn't start on boot?

Thanks

Let's do one issue at time. Where do you enter startDriver command? Startup command is run after reboot. VoltageSet command is available once driver is started. There is information about running drivers in the main page.

I don't know much about Esphome. Last time I checked it had just powersave copied from OBK by one of our user. OBK, on the other hand, is calibrated to utilize OBK powersave - as far as I remember it was done few years ago by @ btsimonh, who adjusted timers to allow longer dynamic sleep. Just keep in mind that device won't sleep if you keep web app log open.

By "this kind of devices" I mean like smart plugs or smart switches. Or... or just enable PowerSave 1 on any OBK device. It should be okay since we adjusted PowerSave to take BL0937 into the account.