Protium 4 Gang ON/Off Modular Smart Switch, Fit on 2 Module of Roma Plate for Indian homes.
This device has WB3S (BK7231T) chip and TuyaMCU
Product Images
How to open
The switch touch plate is mounted to the housing with 4 clips, 2 on each sides. Gently press the clips inside and then push out towards the touch plate
Teardown WB3S is sandwiched between the relay board and the TuyaMCU board
FTDI USB to TTL Serial
Board View
Pre-tin the pads
Solder the jumper cables
Preparing to upload the OpenBK7231T firmware
Download the last firmware from here https://github.com/openshwprojects/OpenBK7231T_App/releases
Connect the FTDI to the computer
Upload the firmware
I use ArchLinux, execute the below command, change the firmware and the serial port accordingly
When executing for the first time, it will fail as below.
Execute the command again, this time as soon as you execute the command, need to power cycle the device, do not RESET the device.
Power cycle the device by disconnecting the 3.3v power line and not GND, I use the jumper on the FTDI adapter.
Restart the device, connect to the access point and open the device page.
Configure the device
Create a file call autoexec.bat with below content
Click on Config and then click on Launch Web Application
From the new tab, click on Filesystem
Drag and drop the autoexec.bat file as shown below.
Click on OTA and then click on Reboot
Configure WiFi and MQTT
My Home Assistant configuration
This device has WB3S (BK7231T) chip and TuyaMCU
Product Images
How to open
The switch touch plate is mounted to the housing with 4 clips, 2 on each sides. Gently press the clips inside and then push out towards the touch plate
Teardown WB3S is sandwiched between the relay board and the TuyaMCU board
FTDI USB to TTL Serial
Board View
Pre-tin the pads
Solder the jumper cables
Preparing to upload the OpenBK7231T firmware
Download the last firmware from here https://github.com/openshwprojects/OpenBK7231T_App/releases
Connect the FTDI to the computer
Upload the firmware
I use ArchLinux, execute the below command, change the firmware and the serial port accordingly
Code: bash
Log in, to see the code
When executing for the first time, it will fail as below.
Execute the command again, this time as soon as you execute the command, need to power cycle the device, do not RESET the device.
Power cycle the device by disconnecting the 3.3v power line and not GND, I use the jumper on the FTDI adapter.
Restart the device, connect to the access point and open the device page.
Configure the device
Create a file call autoexec.bat with below content
startDriver TuyaMCU
setChannelType 1 toggle
setChannelType 2 toggle
setChannelType 3 toggle
setChannelType 4 toggle
setChannelType 7 TextField
setChannelType 8 TextField
setChannelType 9 TextField
setChannelType 10 TextField
linkTuyaMCUOutputToChannel 1 1 1
linkTuyaMCUOutputToChannel 2 1 2
linkTuyaMCUOutputToChannel 3 1 3
linkTuyaMCUOutputToChannel 4 1 4
linkTuyaMCUOutputToChannel 7 2 7
linkTuyaMCUOutputToChannel 8 2 8
linkTuyaMCUOutputToChannel 9 2 9
linkTuyaMCUOutputToChannel 10 2 10Click on Config and then click on Launch Web Application
From the new tab, click on Filesystem
Drag and drop the autoexec.bat file as shown below.
Click on OTA and then click on Reboot
Configure WiFi and MQTT
My Home Assistant configuration
switch:
- platform: mqtt
name: "obk-room-1 Wall Light"
unique_id: "42CFE03F_1"
icon: mdi:lightbulb
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/1/get"
state_on: 1
state_off: 0
command_topic: "obk-room-1/1/set"
payload_on: 1
payload_off: 0
qos: 1
- platform: mqtt
name: "obk-room-1 Ceiling Light"
unique_id: "42CFE03F_2"
icon: mdi:lightbulb
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/2/get"
state_on: 1
state_off: 0
command_topic: "obk-room-1/2/set"
payload_on: 1
payload_off: 0
qos: 1
- platform: mqtt
name: "obk-room-1 Ceiling Fan"
unique_id: "42CFE03F_3"
icon: mdi:fan
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/3/get"
state_on: 1
state_off: 0
command_topic: "obk-room-1/3/set"
payload_on: 1
payload_off: 0
qos: 1
- platform: mqtt
name: "obk-room-1 Socket"
unique_id: "42CFE03F_4"
icon: mdi:lightbulb
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/4/get"
state_on: 1
state_off: 0
command_topic: "obk-room-1/4/set"
payload_on: 1
payload_off: 0
qos: 1
number:
- platform: mqtt
name: "obk-room-1 Wall Light Countdown"
unique_id: "42CFE03F_7"
icon: mdi:cog-counterclockwise
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/7/get"
command_topic: "obk-room-1/7/set"
qos: 1
- platform: mqtt
name: "obk-room-1 Ceiling Light Countdown"
unique_id: "42CFE03F_8"
icon: mdi:cog-counterclockwise
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/8/get"
command_topic: "obk-room-1/8/set"
qos: 1
- platform: mqtt
name: "obk-room-1 Ceiling Fan Countdown"
unique_id: "42CFE03F_9"
icon: mdi:cog-counterclockwise
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/9/get"
command_topic: "obk-room-1/9/set"
qos: 1
- platform: mqtt
name: "obk-room-1 Socket Countdown"
unique_id: "42CFE03F_10"
icon: mdi:cog-counterclockwise
availability:
- topic: "obk-room-1/connected"
state_topic: "obk-room-1/10/get"
command_topic: "obk-room-1/10/set"
qos: 1
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