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[Solved] Flashing BK7231N Chipset: User's Experience with Tongou TO-Q-SY-JWT Rail DIN Switch

Ramirez22 1953 6
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  • Helpful post
    #1 20788556
    Ramirez22
    Level 3  

    Hello.

    Total newbie and not good in English, please be patient with me :)

    I have a Rail DIN switch with power metering (look in title)

    I flash it with this file

    Code: text Expand Select all Copy to clipboard
    Chipset: BK7231N
Build: Build on Oct 26 2023 06:53:47 version 1.17.291


    I apply these parameters
    Code: text Expand Select all Copy to clipboard
    {
  "vendor": "Tongou",
  "bDetailed": "0",
  "name": "TO-Q-SY-JWT Switch and Meter for DIN rail.",
  "model": "TO-Q-SY-JWT",
  "chip": "BK7231N",
  "board": "TODO",
  "flags": "33555456",
  "keywords": [
    "Power meter",
    "Rail DIN"
  ],
  "pins": {
    "9": "LED_n;1",
    "15": "WifiLED_n;0",
    "17": "Btn;1",
    "24": "BridgeFWD;1",
    "26": "BridgeREV;1"
  },
  "command": "backlog startDriver BL0942; SetupEnergyStats 1 30 120 0; startDriver NTP"
}


    Flags:
    10, 38 and 40 are set to true

    Working:
    On / Off the switch with button or via Ethernet main page functional

    Not working:
    Power metering always shows "0"

    I have this error in web app logs:
    Quote:
    Warn:EnergyMeter:Consumed 256 unwanted non-header byte in BL0942 buffer


    Is it possible to have some help? But remember: newbie and not English, so simple words please :D

    Many thanks!

    [EDIT1]: I forgot to specify that I launch these commands with 100W Halogen lamp and meters:
    Code: text Expand Select all Copy to clipboard
    
PowerSet 100
VoltageSet 233
CurrentSet 0.42

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  • #2 20789922
    p.kaczmarek2
    Moderator Smart Home  
    Hello, how do you know it's BL0942?
    Maybe it's BL0937?
    Or some other chip...

    Can you do Tuya config extraction and attach here result: https://www.youtube.com/watch?v=WunlqIMAdgw
    Helpful post? Buy me a coffee.
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  • #3 20789986
    Ramirez22
    Level 3  
    Hello,

    Thanks for your help.

    I suppose this is a BL0942 cause https://www.elektroda.com/rtvforum/topic3934580.html#20435098. It's the same item, but you're right : I don't check components

    Here you can find results
    Code: text Expand Select all Copy to clipboard
    {
	"bt1_pin":"17",
	"led1_pin":"9",
	"rl1_drvtime":"60",
	"net_trig":"2",
	"rl_on1_pin":"24",
	"jv":"1.0..1",
	"netled1_lv":"0",
	"netled_reuse":"0",
	"bt1_type":"0",
	"nety_led":"1",
	"rl_off1_pin":"26",
	"over_cur":"64000",
	"bt1_lv":"0",
	"reset_t":"5",
	"netled1_pin":"15",
	"chip_type":"3",
	"rl_on1_lv":"1",
	"lose_vol":"0",
	"over_vol":"0",
	"module":"CBU",
	"ch_cddpid1":"9",
	"ch1_stat":"2",
	"led1_lv":"0",
	"rl1_type":"1",
	"ch_num":"1",
	"ele_fun_en":"1",
	"rl_off1_lv":"1",
	"netn_led":"0",
	"vol_def":"0",
	"ch_dpid1":"1",
	"crc":"88",
	"}/Agw_di0Atls_ca_cntbv":"40.00",
	"pv":"2.2",
	"lpv":"3.3",
	"pk":"keyuh3jxk9wu8ruj",
	"firmk":"keyuh3jxk9wu8ruj",
	"cadv":"0",
	"cdv":"1.0.0",
	"dev_swv":"1.0.2",
	"s_id":"null",
	"dtp":"0",
	"sync":"0",
	"attr_num":"0",
	"mst_tp_0":"0",
	"mst_ver_0":"null",
	"mst_tp_1":"0",
	"mst.com":"1883",
	"mq_ip":"3.121.210.75",
	"ai_sp":"null",
	"ai_sp_ip":"null",
	"mq_psk":"m2.tuyaeu.com",
	"mq_psk_ip":"3.121.210.75",
	"md":"0",
	"random":"0",
	"wfb64":"1",
	"stat":"0",
	"token":"null",
	"region":"null",
	"reg_key":"null",
	"dns_prio":"0",
	"lp_ip":"null",
	"time_z":"+01",
	"s_time_z":"[[1679792400",
	"wx_app_id":"null",
	"wx_uuid":"null",
	"dy_tls_m":"2",
	"cloud_cap":"1025",
	"psk21_key":"null "
}

    Code: text Expand Select all Copy to clipboard
    Device configuration, as extracted from Tuya: 
- Button (channel 1) on P17
- LED (channel 1) on P9
- WiFi LED on P15
Device seems to be using CBU module, which is using BK7231N.
And the Tuya section starts, as usual, at 2023424


    I don't understans anything, but I'm afraid that no information about meter ...

    This is the script generated:
    Code: text Expand Select all Copy to clipboard
    ClearIO // clear old GPIO/channels
lfs_format // clear LFS
StartupCommand ""  // clear STARTUP
stopDriver *  // kill drivers
setPinRole 15 WifiLED_n
backlog setPinRole 9 LED; setPinChannel 9 1
backlog setPinRole 17 Btn; setPinChannel 17 1


    Is it helpfull for you ?

    Added after 8 [hours] 4 [minutes]:

    [EDIT1] I add below logs during start driver BL0942, maybe important information ...

    Code: text Expand Select all Copy to clipboard
    Debug:CMD:cmd [startDriver BL0942]
Info:EnergyMeter:Read ENERGYMETER status values. sizeof(ENERGY_METERING_DATA)=32
Error:CMD:command with name EnergyCntReset already exists!
Error:CMD:command with name SetupEnergyStats already exists!
Error:CMD:command with name ConsumptionThreshold already exists!
Error:CMD:command with name VCPPublishThreshold already exists!
Error:CMD:command with name VCPPrecision already exists!
Error:CMD:command with name VCPPublishIntervals already exists!
Error:CMD:command with name VoltageSet already exists!
Error:CMD:command with name CurrentSet already exists!
Error:CMD:command with name PowerSet already exists!
Info:CMD:[WebApp Cmd 'startDriver BL0942' Result] OK
Warn:EnergyMeter:Consumed 2 unwanted non-header byte in BL0942 buffer
Warn:EnergyMeter:Skipping packet with bad checksum 58 wanted 62
Warn:EnergyMeter:Consumed 23 unwanted non-header byte in BL0942 buffer
Warn:EnergyMeter:Consumed 24 unwanted non-header byte in BL0942 buffer
Warn:EnergyMeter:Consumed 24 unwanted non-header byte in BL0942 buffer
Warn:EnergyMeter:Consumed 24 unwanted non-header byte in BL0942 buffer
  • #4 20790095
    p.kaczmarek2
    Moderator Smart Home  
    Are you able to open it and check what's used inside?
    Do you have 2MB original firmware backup?
    Helpful post? Buy me a coffee.
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  • #5 20790631
    Ramirez22
    Level 3  
    In fact, the results above are given by the original backup ...

    [EDIT1] OK, I found the problem
    During flash, I solder small wires on pin 15 and 16.
    But when I remove these wires, I made a shortcut between these 2 pins.

    I clean all the pin and meter is now ok.

    Many thanks for help
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  • #6 20792337
    Ramirez22
    Level 3  
    Take care to don't shortcuts pins !!!
  • #7 20792347
    p.kaczmarek2
    Moderator Smart Home  
    Ah, so you shorted two pins... no wonder, it didn't work. I am happy to hear now your issue is resolved.
    Helpful post? Buy me a coffee.
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Topic summary

✨ A user experienced issues with a Tongou TO-Q-SY-JWT Rail DIN switch powered by the BK7231N chipset after flashing it with firmware. The switch functioned for basic on/off operations but failed to display power metering data, consistently showing "0". After troubleshooting, it was suggested to verify the chip type and perform a Tuya config extraction. The user later discovered that a short circuit between pins 15 and 16, caused by soldering wires during flashing, was the root of the problem. Once the short was resolved, the power metering functioned correctly.
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