Martin Jerry S01 SPST lightswitch - CB3S My blog post on flashing the MJ-S01 switch with OpenBK No big surprises here. The CB3S uses the BK7231N chip, the Windows-based GUI flashing tool worked great once I'd worked through all the details on figuring out which pins to wire up.

Thanks for sharing. I can add it to our devices list here: but first I need you to post full JSON (Obk template) in this topic. By the way, your blog seems very detailed and useful. Are you going to describe more OBK devices? Maybe TuyaMCU-based one next?

Martin Jerry S01 SPST Lightswitch with CB3S Module Compatibility

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#1 21212855 02 Sep 2024 18:05

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Post #1
21212855 02 Sep 2024 18:05

Martin Jerry S01 SPST lightswitch - CB3S

My blog post on flashing the MJ-S01 switch with OpenBK https://lowtek.ca/roo/2024/pown-your-iot-openbeken/

No big surprises here. The CB3S uses the BK7231N chip, the Windows-based GUI flashing tool worked great once I'd worked through all the details on figuring out which pins to wire up.
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#2 21212988 02 Sep 2024 19:51

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #2
21212988 02 Sep 2024 19:51

Thanks for sharing. I can add it to our devices list here:
https://openbekeniot.github.io/webapp/devicesList.html
but first I need you to post full JSON (Obk template) in this topic.

By the way, your blog seems very detailed and useful. Are you going to describe more OBK devices? Maybe TuyaMCU-based one next?

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.

#3 21213057 02 Sep 2024 20:34

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Post #3

21213057 02 Sep 2024 20:34

Here is the JSON that was decoded from the stock firmware


{
   "rl1_lv":"1",
   "netled_lv":"0",
   "bt_type":"0",
   "bt1_pin":"6",
   "led1_pin":"7",
   "rand_dpid":"18",
   "net_trig":"2",
   "led_dp":"15",
   "jv":"1.1.0",
   "backlit_select":"0",
   "nety_led":"0",
   "netled_pin":"8",
   "total_stat":"2",
   "bt1_lv":"0",
   "reset_t":"3",
   "ch_flag1":"1",
   "inch_dp":"19",
   "module":"CB3S",
   "dctrl_select":"0",
   "ch_cddpid1":"7",
   "init_conf":"14",
   "led1_lv":"0",
   "light_status_select":"0",
   "zero_select":"0",
   "backlit_dp":"16",
   "cyc_dpid":"17",
   "ch_num":"1",
   "rl1_pin":"24",
   "netn_led":"1",
   "ch_dpid1":"1",
   "crc":"38"
}

I don't currently have plans to work on other IoT devices, but you never know

If you need to pull images from my blog post, that's fine - but I would appreciate a pointer back to my original article as acknowledgment.

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Martin Jerry S01 SPST Lightswitch with CB3S Module Compatibility

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