Hello and good evening from Germany! I ordered a 1-GANG touch switch from Aliexpress, which is equipped with a BK7231N. Productlink: Flashing the openBK firmware was no problem at all, because the pads are nicely labeled. But now I don't know what to do.... How do I find out where the buttons,...

The Relay/LED roles are applied without restarting. You can create, for example, 5 channels with 5 relays, save setting, do not restart, and click buttons on main page to see which one is working. Write down working one, then again, check next 5, etc. Same with buttons. The only things that require restart are custom drivers like BL0942, BL0937, DHT11, etc

Hello, there are two options, you can just guess (brute-force all pins,test each of them in config) or look at the PCB: BK7231 datasheet, pinout, programming, specification, wiki (BK7231T, BK7231N) Note that you can easily align your chip to the schematic, look where pin 1 is (with a marker), or just use crystal oscillator position as a reference (XO/XI pins). Which traces are going to relays? Which are going to touch button controller IC? I could help more if I could get better quality photos where I can see individual traces

Hello and thank you for your answer!I will try to take some better pictures and trace the tracks with a multimeter (?).If I assign the LED function to a PIN and also click save, is the output directly controlled, or does it require a restart?This is totally new territory for me - sorry.

With try and error I managed it: PINFunctionP9 (PWM3)Btn 1P14Rel 1P15Led 1P28WifiLED

Thanks, it will be added to templates list. PS: also try: startDriver SSDP and your device will be seen by Windows

[BK7231N] KING Smart WIFI 1-Gang Touch Switch - Button, Relay, LED Location & OpenBK Firmware

floriankoeppel 1146 5

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#1 20424220 05 Feb 2023 21:07

floriankoeppel floriankoeppel

Level 2

Post #1
20424220 05 Feb 2023 21:07

Hello and good evening from Germany!

I ordered a 1-GANG touch switch from Aliexpress, which is equipped with a BK7231N.
Productlink: https://de.aliexpress.com/item/1005004479236954.html?channel=twinner
Flashing the openBK firmware was no problem at all, because the pads are nicely labeled.
But now I don't know what to do....
How do I find out where the buttons, relays and LEDs (Power, Wlan) are located?
How do I proceed?

Is there a reasonable procedure?
I would be glad about help.
Greetings
Florian

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#2 20424292 05 Feb 2023 21:52

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

Helpful post? (0)

Post #2
20424292 05 Feb 2023 21:52

Hello, there are two options, you can just guess (brute-force all pins,test each of them in config) or look at the PCB:
BK7231 datasheet, pinout, programming, specification, wiki (BK7231T, BK7231N)

Note that you can easily align your chip to the schematic, look where pin 1 is (with a marker), or just use crystal oscillator position as a reference (XO/XI pins).
Which traces are going to relays? Which are going to touch button controller IC?

I could help more if I could get better quality photos where I can see individual traces

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
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#3 20424615 06 Feb 2023 08:16

floriankoeppel floriankoeppel

Level 2

Topic author Helpful post? (0)

Post #3
20424615 06 Feb 2023 08:16

Hello and thank you for your answer!
I will try to take some better pictures and trace the tracks with a multimeter (?).
If I assign the "LED" function to a PIN and also click "save", is the output directly controlled, or does it require a restart?
This is totally new territory for me - sorry.
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Helpful post

#4 20424632 06 Feb 2023 08:33

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

Helpful post? (+1)

Helpful post
Post #4
20424632 06 Feb 2023 08:33

The Relay/LED roles are applied without restarting. You can create, for example, 5 channels with 5 relays, save setting, do not restart, and click buttons on main page to see which one is working. Write down working one, then again, check next 5, etc. Same with buttons.

The only things that require restart are custom drivers like BL0942, BL0937, DHT11, etc

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
ADVERTISEMENT
#5 20425775 06 Feb 2023 19:52

floriankoeppel floriankoeppel

Level 2

Topic author Helpful post? (0)

Post #5
20425775 06 Feb 2023 19:52

With try and error I managed it:
PIN Function
P9 (PWM3) Btn 1
P14 Rel 1
P15 Led 1
P28 WifiLED
#6 20425935 06 Feb 2023 21:01

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

Helpful post? (0)

Post #6
20425935 06 Feb 2023 21:01

Thanks, it will be added to templates list.

PS: also try: startDriver SSDP and your device will be seen by Windows

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
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PIN	Function
P9 (PWM3)	Btn 1
P14	Rel 1
P15	Led 1
P28	WifiLED

[BK7231N] KING Smart WIFI 1-Gang Touch Switch - Button, Relay, LED Location & OpenBK Firmware

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