[BK7231N - CBU] WD-01ADE Tuya water pump with WiFi - Unable to flash

Name: [BK7231N - CBU] WD-01ADE Tuya water pump with WiFi - Unable to flash
Uploaded: 2023-10-03T14:19:02+02:00
Description: 1. So I am using CH340, connected RX, TX, 3v3, and GND. 2. That blue diode stays solid for a second then goes blinking. 3. I start the BK7231 GUI Simple Flasher. 4. Choose the correct COM port, click on the flash firmware. 5. I am asked to shorten GND and CEN. 6. I shorten GND and CEN, and the...

Question

1. So I am using CH340, connected RX, TX, 3v3, and GND. 2. That blue diode stays solid for a second then goes blinking. 3. I start the BK7231 GUI Simple Flasher. 4. Choose the correct COM port, click on the flash firmware. 5. I am asked to shorten GND and CEN. 6. I shorten GND and CEN, and the...

p.kaczmarek2 · Accepted Answer

If this device has USB power, then the simplest way would be to:
- connect GND, RX and TX from USB to UART converter
- on USB to UART converter, connect VDD and 3.3V to select voltage levels 3.3V (at least on my USB to UART converter I need to do this, consult your own converter manual for more info)
- connect power from USB as well
- then, in flash tool, start flash, it will be doing "{getting bus" and waiting, while it waits, disconnect and connect power to the board, it should proceed with flashing

The AMS1117-3.3V method is very universal, but if your board already has AMS1117-3.3V on board or any other 3.3V source, then you can just use that. Of course, it assumes that your board is not mains powered, because if it's mains powered and it has non-isolated power supply then you must never use this power supply while flashing, non-isolated power supplies ARE VERY DANGEROUS, you could fry your USB port

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.

p.kaczmarek2 · Answer

Can you post a photo of the setup? It is better to do a power cycle then, disconnect and reconnect power ( reliable 3.3V), I do not even solder CEN

drkbg · Answer

Will do later, as I already disconnected everything.Does this mean that I should power the device via the power port to an external 3.3V additionally to 3.3V from the CH340?

p.kaczmarek2 · Answer

I never power device directly from 3.3V of CH340. My CH340 dongle cannot provide enough current for programming to success. I always use external LDO, like AMS1117-3.3V.

However, some people may have other USB to UART converters with better current capabilities.

Have you seen our videos?
https://www.youtube.com/@elektrodacom

drkbg · Answer

My setup looks like this.So if I understand you correctly:1. I should not use the USB power connection during flashing.2. I should use something like AMS1117-3.3V to connect to the 3v3 and GND.At the end, it should look like this:

drkbg · Answer

Thanks a lot for the guidance. Indeed, the following worked for me:

- Connect CH340G: GND to GND, TX to RX and RX to TX
- Connect CH340G to USB
- Connect power of device to USB
- Start flasher, select firmware
- Click on backup and flash
- Shorten CEN & GND for less than a sec
- Flashing starts

I had a problem with connecting to WiFi but found that toggling power 5-6 times will result in safe mode with AP turned on again.

I use the autoexec from this thread.

setChannelType 1 toggle
setChannelLabel 1 "Pump A"
setChannelType 2 toggle
setChannelLabel 2 "Pump B"
setStartValue 1 0
setStartValue 2 0
setPinRole 16 Rel
setPinChannel 16 1
setPinRole 14 Rel
setPinChannel 14 2
setPinRole 8 Btn_n
setPinChannel 8 1
setPinRole 7 Btn_n
setPinChannel 7 2
setPinRole 20 WifiLED

For some reason, in Home Assistant only Pump A is shown as an entity connected to the Pump, but both appear as switches.

Thanks a lot!

p.kaczmarek2 · Answer

Hey, can you also post YAML from Web App, so I can add this device to our teardowns list? Thanks!

drkbg · Answer

Do you mean the template on the Config page of WebApp?

p.kaczmarek2 · Answer

Yes, that's what we use for devices list:

drkbg · Answer

There you go (I filled out some of the fields that were missing):

{
  "vendor": "Tuya",
  "bDetailed": "0",
  "name": "WD-01ADE Tuya water pump with WiFi",
  "model": "WD-01ADE",
  "chip": "BK7231N",
  "board": "CBU",
  "flags": "1024",
  "keywords": [
    "garden",
    "JOEKOL",
    "Irrigation"
  ],
  "pins": {
    "7": "Btn_n;2",
    "8": "Btn_n;1",
    "14": "Rel;2",
    "16": "Rel;1",
    "20": "WifiLED;0"
  },
  "command": "",
  "image": "https://obrazki.elektroda.pl/5341773600_1686167391.jpg",
  "wiki": "https://www.elektroda.com/rtvforum/topic3982582.html"
}

Not sure what the board is meant to be but most probably in that case the answer would be CBU-NL.

I would suggest joining the two threads about this device https://www.elektroda.com/rtvforum/topic3982582.html and this one here.

One more question about this device that I cannot find the answer in the forum:

Buttons work, but you have to push them twice. I checked the logs (which are very talkative writing):


Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:MAIN:Time 471, idle 183206/s, free 71880, MQTT 1(2), bWifi 1, secondsWithNoPing 1, socks 2/38 
Info:GEN:8 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnInitialPressDown
Info:MAIN:Time 472, idle 198358/s, free 71880, MQTT 1(2), bWifi 1, secondsWithNoPing 1, socks 2/38 
Info:GEN:7 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHoldStart
Info:MAIN:Time 473, idle 190853/s, free 71880, MQTT 1(2), bWifi 1, secondsWithNoPing 1, socks 2/38 
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:MAIN:Time 474, idle 189577/s, free 71880, MQTT 1(2), bWifi 1, secondsWithNoPing 1, socks 2/38 
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:GEN:7 Button_OnLongPressHold
Info:GEN:8 Button_OnLongPressHold
Info:MAIN:Time 475, idle 191014/s, free 71880, MQTT 1(2), bWifi 1, secondsWithNoPing 1, socks 2/38

I believe the first push of the button is the
Button_OnInitialPressDown
and the second is
Button_OnLongPressHoldStart

1. Is it possible to use the Button_OnInitialPressDown event to start the pump?
2. Why is this Button_OnLongPressHold constantly coming in the logs?

p.kaczmarek2 · Answer

Why are you using Btn_n instead of Btn? Btn_n has inversed logic, and you most likely have just normal Buttons, so code thinks that Button is pressed all the time when it's not pressed in reality, that's why you get Button_OnLongPressHold spam..

drkbg · Answer

That is a good question. Andy41 also asked the same one in the other thread.I guess this happens when you just copy paste stuff from the internet :)Will try without the _n and report.

p.kaczmarek2 · Answer

So you haven't used our automatic GPIO extraction?

drkbg · Answer

The one above doesn't work very well for me:

When I use the "Extract Config from Tuya Binary" I get the following JSON:


{
	"abi": "0",
	"id": "null",
	"swv": "1.1.8",
	"bv": "40.00",
	"pv": "2.2",
	"lpv": "3.4",
	"pk": "key4rj5r4pv5wgwp",
	"firmk": "null",
	"cadv": "1.0.5",
	"cdv": "1.0.0",
	"dev_swv": "1.1.8",
	"s_id": "null",
	"dtp": "0",
	"sync": "0",
	"attr_num": "1",
	"mst_tp_0": "9",
	"mst_ver_0": "1.1.8",
	"mst_md5_0": "null",
	"mst_tp_1": "0",
	"mst_ver_1": "null",
	"mst_md5_1": "null",
	"mst_tp_2": "0",
	"mst_ver_2": "null",
	"mst_md5_2": "null",
	"mst_tp_3": "0",
	"mst_ver_3": "null",
	"mst_md5_3": "null }0EAtls_ca_cnt0)!Agw_wsm{nc_tp",
	"ssid": "null",
	"passwd": "null",
	"md": "0",
	"random": "0",
	"wfb64": "1",
	"stat": "0",
	"token": "null",
	"region": "null",
	"reg_key": "null",
	"dns_prio": "03Awf_start_md3uuid",
	"psk_key": "blabla",
	"auth_key": "blabla",
	"ap_s{nc_tp": "1",
	"ap_ssid": "SmartLife",
	"ap_passwd": "null",
	"country_code": "CN",
	"bt_mac": "null",
	"bt_hid": "null",
	"prod_test": "false",
	"fac_pin": "blabla",
	"lckey": "null",
	"h_url": "null",
	"h_ip": "null",
	"hs_url": "null",
	"hs_ip": "null",
	"hs_psk": "null",
	"hs_psk_ip": "null",
	"mqs_url": "null",
	"mqs_ip": "null",
	"mq_url": "null",
	"mq_ip": "null",
	"ai_sp": "null",
	"ai_sp_ip": "null",
	"mq_psk": "null",
	"mq_psk_ip": "null",
	"lp_url": "null",
	"lp_ip": "null",
	"time_z": "null",
	"s_time_z": "null",
	"wx_app_id": "null",
	"wx_uuid": "null",
	"dy_tls_m": "0",
	"cloud_cap": "0",
	"psk21_key": "null }eA000004sa7s[{type",
	"mode": "rw",
	"property": "{type",
	"{type": "obj",
	"{mode": "rw",
	"type": "raw}",
	"max": "86400",
	"scale": "0",
	"step": "1",
	"maxlen": "255}",
	"index": "0}{nc_tp",
	"cnt": "0}EGAastro_timer{timestamp"
}

and the following text description:


Sorry, no meaningful pins data found. This device may be TuyaMCU or a custom one with no Tuya config data.
No module information found.
And the Tuya section starts at UNCOMMON POSITION 0

This results in following generated script in the WebApp:


ClearIO // clear old GPIO/channels
lfs_format // clear LFS
StartupCommand ""  // clear STARTUP
stopDriver *  // kill drivers

I am pretty sure this is not what is expected.. so what is wrong?

p.kaczmarek2 · Answer

Ah okay, this device is a custom one which has a hardcoded behaviour, there are no pins in JSON

[BK7231N - CBU] WD-01ADE Tuya water pump with WiFi - Unable to flash

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