Exploring BK7231N Chip in Mini Smart Switch: Firmware Version 1.3.10 Flashing Experience
I came across a seemingly ordinary smart switch.
But inside there is some kind of simplified version with a BK7231N chip.
At first I decided to flash it with Tuya-Convert, but the version of the native firmware was 1.3.10 and it did not allow flashing wirelessly.
After calling the contacts, I decided to flash it in the usual way.
I did not need the CEN contact for the firmware.
Everything went well.
But inside there is some kind of simplified version with a BK7231N chip.
At first I decided to flash it with Tuya-Convert, but the version of the native firmware was 1.3.10 and it did not allow flashing wirelessly.
After calling the contacts, I decided to flash it in the usual way.
I did not need the CEN contact for the firmware.
Everything went well.
{
"rl1_lv":"1",
"on_off_cnt":"10",
"onoff_rst_m":"1",
"onoff_clear_t":"10",
"rand_dpid":"42",
"net_trig":"2",
"onoff_n":"3",
"netled1_lv":"1",
"jv":"102",
"onoff_rst_type":"2",
"total_bt_pin":"23",
"nety_led":"2",
"total_stat":"2",
"reset_t":"5",
"netled1_pin":"26",
"remote_add_dp":"49",
"remote_list_dp":"50",
"net_type":"0",
"inch_dp":"44",
"module":"CB2S",
"ch_cddpid1":"9",
"onoff1":"6",
"clean_t":"5",
"init_conf":"38",
"zero_select":"0",
"onoff_type":"0",
"series_ctrl":"0",
"total_bt_lv":"0",
"cyc_dpid":"43",
"remote_select":"0",
"ch_num":"1",
"rl1_pin":"7",
"netn_led":"2",
"ch_dpid1":"1",
"crc":"6",
"}PPAgw_di{abi":"0",
"id":"null",
"swv":"1.3.10",
"bv":"40.00",
"pv":"2.2",
"lpv":"3.4",
"pk":"keyjnuy4s3kre7m7",
"firmk":"keyjnuy4s3kre7m7",
"cadv":"1.0.5",
"cdv":"1.0.0",
"dev_swv":"1.3.10",
"s_id":"null",
"dtp":"0",
"sync":"0",
"attr_num":"1",
"mst_tp_0":"9",
"mst_ver_0":"1.3.10",
"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 }xAinch_time_key{ch0",
"ssid":"dnRydXN0LWZsYXNo",
"passwd":"null",
"md":"1",
"random":"0",
"wfb64":"1",
"stat":"0",
"token":"00000000",
"region":"US",
"reg_key":"0101",
"dns_prio":"0 "
}Device configuration, as extracted from Tuya:
- Pair/Toggle All Button on P23
- WiFi LED on P26
- TglChannelToggle (channel 1) on P6
- Relay (channel 1) on P7
Device seems to be using CB2S module, which is using BK7231N.
And the Tuya section starts, as usual, at 2023424
Comments
Add a commentHi - I found your posting about the Mini Smart switch and I wanted to flash new firmware on my device too. I just purchased a device that looks looks just like the one that you posted. It has a BK7231N... [Read more]
Hello, I flashed the OpenBK firmware, this is an alternative to tasmot. Everything is written in great detail on github. There's nothing complicated there. https://github.com/openshwprojects/OpenBK... [Read more]
Thanks - I succeeded. It was a bit more involved than Tasmota on a Sonoff, but I followed the instructions and got it done. Perhaps there was a bit too much information provided and I had to figure out... [Read more]