OpenBK7231T/OpenBeken is a Tasmota/Esphome replacement for new Tuya modules featuring MQTT and Home Assistant compatibility. This repository is named "OpenBK7231T_App", but now it's a multiplatform app, supporting build for multiple separate chips:

• BK7231T (WB3S, WB2S, WB2L, etc)
• BK7231N (CB2S, CB2L, WB2L_M1, etc)
• T34 (T34 is based on BK7231N)
• BL2028N (BL2028N is a Belon version of BK7231N)
• XR809 (XR3, etc)
• BL602
• W800 (W800-C400, WinnerMicro WiFi & Bluetooth), W801
• W600 (WinnerMicro chip), W601

Please use automatically compiled binaries from the Releases tab. To build yourself for a given platform, just checkout first our version of SDK and then checkout this app repository into it, details later.

We have our own interactive devices database that is maintained by users. The database is also accessible from inside our firmware (but requires internet connection to fetch). Have a not listed device? HELP US, submit a teardown here. NOTE: Obviously almost any device with supported chip (BK7231, BL602, W600, etc is potentially supported and it's not possible to list all available devices in the market, so feel free to try even if your device is not listed - we are here to help and guide you step by step!)

OpenBeken features:

• Tasmota-like setup, configuration and experience on all supported platforms
• OTA firwmare upgrade system (for Beken chips); to use OTA, drag and drop RBL file (always RBL file) on OTA field on new Web App Javascript Console
• MQTT compatibility with Home Assistant
• Support for multiple relays, buttons, leds, inputs and PWMs
• Driver system for custom peripherals, including TuyaMCU, I2C bus and BL0942, BL0937 power metering chips
• Supports multiple I2C devices, like TC74 temperature sensor, MCP23017 port expander, PCF8574T LCD 2x16 (or other?), etc
• NTP time from network (can be used with TH06 and other TuyaMCU devices)
• basic support for TuyaMCU Battery Powered devices protocol (TuyaMCU enables WiFi module only to report the state, eg. for door sensors, water sensors)
• RGBCW LED lighting control compatible with Home Assistant (both PWM LEDs, SM2135 LEDs and BP5758 LEDs)
• LittleFS integration for large files (resides in OTA memory, so you have to backup it every time you OTA)
• Command line system for starting and configuring drivers
• Short startup command (up to 512 characters) storage in flash config, so you can easily init your drivers (eg. BL0942) without LittleFS
• Simple scripting and events system (allows you to mirror Tasmota rules, for example catch button click, double click, hold)
• Automatic reconnect when WiFi network goes out
• and much more

For more Information refer to the WIKI

Q: How do I enable more logging? How to make more logs visible?
A: First type "loglevel x" in console, where x is 0 to 7, default value is 3 (log all up to info), value 4 will also log debug logs, and value 5 will include "extradebug". Then, on online panel, also switch filter to "All" (both steps must be done for logs to show up)

Q: I entered wrong SSID and my device is not accessible. How to recover?
A: Do five short power on/power off cycles (but not too short, because device might have capacitors and they need to discharge every time). Device will go back to AP mode (aka Safe Mode)

Q: I somehow lost my MAC address and I am unable to change it in Options! My MAC ends with 000000, how to fix?
A: You have most likely overwrote the TLV header of RF partition of BK7231. For BK7231T, we have a way to restore it - open Web App, go to Flash tab, and press "Restore RF Config"

OpenBeken supports online builds for all platforms (BK7231T, BK7231N, XR809, BL602, W800), but if you want to compile it yourself, see BUILDING.md

get BKwriter 1.60 exe (extract zip) from here

Use USB to TTL converter with 3.3V logic levels, like HW 597

connect the PC to TX1 and RX1 on the bk7231 (TX2 and RX2 are optional, only for log)

start flash in BKwriter 1.60 (select COM port, etc) then re-power the device (or reset with CEN by temporary connecting CEN to ground) until the flashing program continues, repeat if required.

clone the repo https://github.com/OpenBekenIOT/hid_download_py

Use USB to TTL converter with 3.3V logic levels, like HW 597

connect the PC to TX1 and RX1 on the bk7231 (TX2 and RX2 are optional, only for log)

start flash using: python uartprogram <sdk folder>\apps\<folder>\output\1.0.0\<appname>_UA_<appversion>.bin -d <port> -w then re-power the device (or reset with CEN temporary connecting CEN to ground) until the flashing program continues, repeat if required.

e.g. python uartprogram C:\DataNoBackup\tuya\tuya-iotos-embeded-sdk-wifi-ble-bk7231t\apps\my_alpha_demo\output\1.0.0\my_alpha_demo_UA_1.0.0.bin -d com4 -w

see https://github.com/OpenBekenIOT/hid_download_py/blob/master/SPIFlash.md

See: https://github.com/openshwprojects/BK7231_SPI_Flasher

Once the firmware has been flashed for the first time, it can be flashed over wifi (note: change hardcoded firmware URL in new_http.c)

Setup a simple webserver to serve <sdk folder>\apps\<folder>\output\1.0.0\<appname>_<appversion>.rbl

Visit /ota - here start the flashing process.

At first boot, if the new firmware does not find your wifi SSID and password in the Tuya flash, it will start as an access point.

The access point will come up on 192.168.4.1, however some machines may not get an ip from it - you may need to configure your connecting for a staitc IP on that network, e.g. 192.168.4.10

Once you are connected and have an IP, go to https://192.168.4.1/index , select config then wifi, and setup your wifi.

After a reboot, the device should connect to your lan.

BKwriter 1.60 doesn't work for BK7231N for me, in BK7231 mode it errors with "invalid CRC" and in BK7231N mode it fails to unprotect the device. For BK7231N, one should use:

https://github.com/OpenBekenIOT/hid_download_py

Flash BK7231N QIO binary, like that:

python uartprogram W:\GIT\OpenBK7231N\apps\OpenBK7231N_App\output\1.0.0\OpenBK7231N_app_QIO_1.0.0.bin --unprotect -d com10 -w --startaddr 0x0

Remember - QIO binary with --unprotect and --startaddr 0x0, this is for N chip, not for T.

You can see an example of detailed teardown and BK7231N flashing here: https://www.elektroda.com/rtvforum/topic3874289.html

Get USB to UART converter, start phoenixMC.exe from OpenXR809 repository and follow this guide: https://www.elektroda.com/rtvforum/topic3806769.html

Follow the BL602 guide: https://www.elektroda.com/rtvforum/topic3889041.html

Use wm_tool.exe, command line utility from this SDK https://github.com/openshwprojects/OpenW800

wm_tool.exe -c COM9 -dl W:\GIT\wm_sdk_w800\bin\w800\w800.fls

wm_tool.exe will then wait for device reset. Repower it or connect RESET to ground, then it will start the flashing

Create a HTTP server (maybe with Node-Red), then use the update mechanism by HTTP link. Give link to w800_ota.img file from the build. The second OTA mechanism (on javascript panel, by drag and drop) is not ready yet for W800/W801. Wait for device to restart, do not repower it manually.

It is also possible to build OpenBeken for Windows. Entire OBK builds correctly, along with script support, but MQTT from LWIP library on Windows is currently a stub and there a minor issue in Winsock code which breaks Tasmota Control compatibility. To build for Windows, open openBeken_win32_mvsc2017 in Microsoft Visual Studio Community 2017 and select configuration Debug Windows or Debug Windows Scriptonly and press build. This should make development and testing easier. LittleFS works in Windows build, it operates on 2MB memory saved in file, so you can even test scripting, etc

You can set pin roles in "Configure Module" section or use one of predefined templates from "Quick config" subpage. For each pin, you also set coresponding channel value. This is needed for modules with multiple relays. If you have 3 relays and 3 buttons, you need to use channel values like 1, 2, and 3. Just enter '1' in the text field, etc. Currently available pin roles:

• Button - a typical button of Tuya device with active-low state (a button that connects IO pin to ground when pressed and also has a 10k or so pull up resistor)
• Button_n (as Button but pin logical value is inversed)
• Relay - an active-high relay. This relay is closed when a logical 1 value is on linked channel
• Relay_n (as Relay but pin logical value is inversed)
• LED - an active-high LED. The internals of "LED" are the same as of "Relay". Names are just separate to make it easier for users.
• LED_n (as Led but pin logical value is inversed)
• Button Toggle All - this button toggles all channels at once
• Button Toggle All_n (as above but pin logical value is inversed)
• PWM - pulse width modulation output for LED dimmers (with MQTT dimming support from Home Assistant)
• PWM_n - as above, but percentage of duty is inversed. This might be useful for some special LED drivers that are using single PWM to choose between Cool white and Warm white (it also needs setting a special flag in General options)
• WiFi LED - special LED to indicate WLan connection state. LED states are following: LED on = client mode successfully connected to your Router. Half a second blink - connecting to your router, please wait (or connection problem). Fast blink (200ms) - open access point mode. In safe mode (after failed boots), LED might not work.
• DigitalInput - this is a simple digital input pin, it sets the linked channel to current logical value on it, just like digitalRead( ) from Arduino. This input has a internal pull up resistor.
• DigitalInput_n (as above but inversed)
• ToggleChannelOnToggle - this pin will toggle target channel when a value on this pin changes (with debouncing). you can connect simple two position switch here and swapping the switch will toggle target channel relay on or off
• DigitalInput_NoPullUp - same as DigitalInput but with no programmable pull up resistor. This is used for, for example, XR809 water sensor and door sensor.
• DigitalInput_NoPullUp_n (as above but inversed)
• ADC (Analog to Digital converter) - converts voltage to channel value which is later published by MQTT and also can be used to trigger scriptable events
• AlwaysHigh - always outputs 1
• AlwaysLow - always outputs 0
• Btn_NextColor (and _n) - for RGB strip with buttons; sets next predefined color
• Btn_NextDimmer (and _n) - for RGB strip with buttons; when hold, adjusts the brightness
• IRRecv - IR receiver
• IRSend - IR sender
• PWM_n - as PWM, but inversed value

Device is counting full boots (full boot is a boot after which device worked for 30 seconds). If you power off and on device multiple times, it will enter open access point mode and safe mode (safe mode means even pin systems are not initialized). Those modes are used to recover devices from bad configs and errors.

There are multiple console commands that allow you to automate your devices. Commands can be entered manually in command line, can be send by HTTP (just like in Tasmota), can be send by MQTT and also can be scripted.

Are you looking for extra commands? Just search the code: https://github.com/openshwprojects/OpenBK7231T_App/search?q=CMD_RegisterCommand

There is also a conditional exec command. Example: if MQTTOn then "backlog led_dimmer 100; led_enableAll" else "backlog led_dimmer 10; led_enableAll"

Every console command that takes an integer argument supports following constant expansion:

• $CH[CHANNEL_NUMBER] - so, $CH0 is a channel 0 value, etc, so SetChannel 1 $CH2 will get current value of Channel2 and set it to Channel 1
• $led_enableAll - this is the state of led driver, returns 1 or 0
• $led_hue
• $led_saturation
• $led_dimmer

Configuration for EDM-01AA-EU dimmer with TuyaMCU

startDriver TuyaMCU
setChannelType 1 toggle
setChannelType 2 dimmer
tuyaMcu_setBaudRate 115200
tuyaMcu_setDimmerRange 1 1000
// linkTuyaMCUOutputToChannel dpId verType tgChannel
linkTuyaMCUOutputToChannel 1 bool 1
linkTuyaMCUOutputToChannel 2 val 2

Configuration for QIACHIP Universal WIFI Ceiling Fan Light Remote Control Kit - BK7231N - CB2S with TuyaMCU

// start MCU driver
startDriver TuyaMCU
// let's say that channel 1 is dpid1 - fan on/off
setChannelType 1 toggle
// map dpid1 to channel1, var type 1 (boolean)
linkTuyaMCUOutputToChannel 1 1 1
// let's say that channel 2 is dpid9 - light on/off
setChannelType 2 toggle
// map dpid9 to channel2, var type 1 (boolean)
linkTuyaMCUOutputToChannel 9 1 2
//channel 3 is dpid3 - fan speed
setChannelType 3 LowMidHigh
// map dpid3 to channel3, var type 4 (enum)
linkTuyaMCUOutputToChannel 3 4 3
//dpId 17 = beep on/off
setChannelType 4 toggle
linkTuyaMCUOutputToChannel 17 1 4
//
//
//dpId 6, dataType 4-DP_TYPE_ENUM = set timer
setChannelType 5 TextField
linkTuyaMCUOutputToChannel 6 4 5
//
//
//dpId 7, dataType 2-DP_TYPE_VALUE = timer remaining
setChannelType 6 ReadOnly
linkTuyaMCUOutputToChannel 7 2 6

Our scripting engine is able to process script files from LittleFS file system. Each script execution acts like a separate thread (but that's not a real RTOS thread, of course) and can process console commands, conditionals and delays.

To create script, go to secondary web panel (JavaScript App), go to LittleFS tab, click "create file" and enter some content. Use buttons to stop all scripts or to save and run the one you are writing. From a console, you can also use 'startScript fileName label' syntax.

Script example 1:
Loop demo. Features a 'goto' script command (for use within script) and, obviously, a label.
Requirements:

• channel 1 - output relay
  

again:
	echo "Step 1"
	setChannel 1 0
	echo "Step 2"
	delay_s 2
	echo "Step 3"
	setChannel 1 1
	echo "Step 4"
	delay_s 2
	goto again

Script example 2:
Loop & if demo
This example shows how you can use a dummy channel as a variable to create a loop
Requirements:

• channel 1 - output relay
  
• channel 11 - loop variable counter
  

restart:
	// Channel 11 is a counter variable and starts at 0
	setChannel 11 0
again:

	// If channel 11 value reached 10, go to done
	if $CH11>=10 then goto done
	// otherwise toggle channel 1, wait and loop
	toggleChannel 1
	addChannel 11 1
	delay_ms 250
	goto again
done:
	toggleChannel 1
	delay_s 1
	toggleChannel 1
	delay_s 1
	toggleChannel 1
	delay_s 1
	toggleChannel 1
	delay_s 1
	goto restart

Script example 3:
Thread cancelation demo and exclude self demo
This example shows how you can create a script thread with an unique ID and use this ID to cancel the thread later
Requirements:

• channel 1 - output relay
  
• pin 8 - button
  
• pin 9 - button
  

// 'this' is a special keyword - it mean search for script/label in this file
// 123 and 456 are unique script thread names
addEventHandler OnClick 8 startScript this label1 123
addEventHandler OnClick 9 startScript this label2 456

label1:
	// stopScript ID bExcludeSelf
	// this will stop all other instances
	stopScript 456 1
	stopScript 123 1
	setChannel 1 0
	delay_s 1
	setChannel 1 1
	delay_s 1
	setChannel 1 0
	delay_s 1
	setChannel 1 1
	delay_s 1
	setChannel 1 0
	delay_s 1
	setChannel 1 1
	delay_s 1
	exit;
label2:
	// stopScript ID bExcludeSelf
	// this will stop all other instances
	stopScript 456 1
	stopScript 123 1
	setChannel 1 0
	delay_s 0.25
	setChannel 1 1
	delay_s 0.25
	setChannel 1 0
	delay_s 0.25
	setChannel 1 1
	delay_s 0.25
	setChannel 1 0
	delay_s 0.25
	setChannel 1 1
	delay_s 0.25
	setChannel 1 0
	delay_s 0.25
	exit;

Script example 4:
Using channel value as a variable demo
Requirements:

• channel 1 - output relay
  
• channel 11 - you may use it as ADC, or just use setChannel 11 100 or setChannel 11 500 in console to change delay
  

// set default value
setChannel 11 500
// if you don't have ADC, use this to force-display 11 as a slider on GUI
setChannelType 11 dimmer1000

looper:
	setChannel 1 0
	delay_ms $CH11
	setChannel 1 1
	delay_ms $CH11
	goto looper

Channel types are often not required and don't have to be configured, but in some cases they are required for better device control from OpenBeken web panel. Channel types describes the kind of value stored in channel, for example, if you have a Tuya Fan Controller with 3 speeds control, you can set the channel type to LowMidHigh and it will display the correct setting on OpenBeken panel.

You can enable a simple TCP server in device Generic/Flags option, which will listen by default on port 100. Server can accept single connection at time from Putty in RAW mode (raw TCP connection) and accepts text commands for OpenBeken console. In future, we may add support for multiple connections at time. Server will close connection if client does nothing for some time.

There are some extra short commands for TCP console:

• GetChannel [index]
• GetReadings - returns voltage, current and power
• ShortName the commands above return a single ASCII string as a reply so it's easy to parse.

Some MQTT variables are being published only at the startup, some are published periodically (if you enable "broadcast every minute" flag), some are published only when a given value is changed. Below is the table of used publish topics (TODO: add full descriptions)

Hint: in HA, you can use MQTT wildcard to listen to publishes. OBK_DEV_NAME/#

Publishes send by OBK device:

Publishes received by OBK device:

RGBCW light bulbs are now supported and they are compatible with HA by rgb_command_template, brightness_value_template, color_temp_value_template commands. Please follow the guide below showing how to flash, setup and pair them with HA by MQTT:

https://www.elektroda.com/rtvforum/topic3880540.html#19938487

Home Assistant and Node Red. Please refer to this example:

https://www.elektroda.com/rtvforum/viewtopic.php?p=20031489#20031489

Home Assistant Yaml examples. Please refer to this example:

https://www.elektroda.com/rtvforum/topic3908093.html

https://www.elektroda.com/rtvforum/topic3898502.html

Detailed description and step by step tutorial on Elektroda.com is coming soon.

Please refer to this step by step guide: https://www.elektroda.com/rtvforum/topic3887748.html

https://www.elektroda.com/rtvforum/topic3895572.html

There are two ways.

1. Go to Config -> Startup state and set it from GUI here.

2. Use use short startup command from Options or create "autoexec.bat" in LittleFS file system in web panel and execute commands from there.

For example, for RGBCW LED, you can do startup command:

backlog led_dimmer 100; led_basecolor_rgb #FF00FF; led_enableAll 1

For simple relay, in this example on channel number 5, you can do:

backlog SetChannel 5 1

For direct PWM access (for single-color strips etc) you can do:

backlog SetChannel 5 90

MQTT based integration with Home Assistant is possible in 2 ways from the Home Assistant configuration page (Config > Generate Home Assistant cfg).

One can paste the generated yaml configuration into Home Assistant configuration manually.

Or add the devices automatically via discovery. To do click the Start Home Assistant Discovery button which sends outs MQTT discovery messages, one for each entity (switch, light).

• The discovery topic should match the discovery_prefix defined in Home Assistant, the default value is homeassistant.
• More details about Home Assistant discovery can be found here.

Note: Currently, discovery is only implemented for light and relay entities.

I have prepared several detailed teardowns and flashing guides for multiple supported devices. Each comes in two languages - English and Polish.

Outdoor two relays smart switch CCWFIO232PK (BK7231T): https://www.elektroda.com/rtvforum/topic3875654.html https://www.elektroda.pl/rtvforum/viewtopic.php?p=19906670#19906670

Australian Double Power Point DETA 6922HA-Series 2 (BK7231T) (English only) https://community.home-assistant.io/t/detailed-guide-on-how-to-flash-the-new-tuya-beken-chips-with-openbk7231t/437276

Qiachip Smart Switch module (BK7231N/CB2S): https://www.elektroda.com/rtvforum/topic3874289.html https://www.elektroda.pl/rtvforum/viewtopic.php?t=3874289&highlight=

Tuya RGBCW 12W light bulb (raw PWMs, no I2C, BK7231N) https://www.elektroda.com/rtvforum/topic3880540.html#19938487 https://www.elektroda.pl/rtvforum/viewtopic.php?t=3880540&highlight=

LSPA9 CB2S + BL0942 power metering plug: https://www.elektroda.com/rtvforum/topic3887748.html https://www.elektroda.pl/rtvforum/viewtopic.php?t=3887748&highlight=

XR3/XR809 water sensor guide: https://www.elektroda.com/rtvforum/topic3890640.html

https://www.elektroda.pl/rtvforum/viewtopic.php?t=3890640&highlight=

SM2135 LED configuration https://www.elektroda.com/rtvforum/topic3906898.html

https://www.elektroda.pl/rtvforum/viewtopic.php?t=3906898

I had some reports from users saying that they are unable to flash BK7231T with CP2102 but CH340 works. So, maybe try different USB to UART dongle. Some of them might not be reliable enough for flashing.

For technical insights and generic SDK information related to Bekken and XRadio modules, please refer:

https://www.elektroda.com/rtvforum/topic3850712.html

https://www.elektroda.com/rtvforum/topic3866123.html

https://www.elektroda.com/rtvforum/topic3806769.html

If you want to support project, please donate at: https://www.paypal.com/paypalme/openshwprojects

Special thanks for Tasmota/Esphome/etc contributors for making a great reference for implementing Tuya module drivers