[BK7231N/CB2S/BL0942] LSPA7 Tuya Smart Plug teardown and flashing OpenBeken via UART procedure

Device configuration, as extracted from Tuya: 
- Button (channel 1) on P6
- WiFi LED on P8
- Relay (channel 1) on P26
Device seems to be using CB2S module, which is using BK7231N.
And the Tuya section starts, as usual, at 2023424


json format
{
	"rl1_lv":"1",
	"bt1_pin":"6",
	"net_trig":"2",
	"jv":"1.0.3",
	"netled1_lv":"0",
	"netled_reuse":"0",
	"bt1_type":"0",
	"ffc_select":"0",
	"nety_led":"1",
	"over_cur":"16000",
	"bt1_lv":"0",
	"reset_t":"5",
	"netled1_pin":"8",
	"chip_type":"3",
	"lose_vol":"70",
	"over_vol":"300",
	"module":"CB2S",
	"ch_cddpid1":"9",
	"ch1_stat":"2",
	"rl1_type":"0",
	"ch_num":"1",
	"ele_fun_en":"1",
	"rl1_pin":"26",
	"netn_led":"0",
	"vol_def":"0",
	"ch_dpid1":"1",
	"crc":"29",
	"}hfX^Agw_dieAmf_test_close":"40.00",
	"pv":"2.2",
	"lpv":"3.3",
	"pk":"<secret>",
	"firmk":"<secret>",
	"cadv":"true",
	"cdv":"1.0.0",
	"dev_swv":"1.1.7",
	"s_id":"null",
	"dtp":"0",
	"sync":"0",
	"attr_num":"0",
	"mst_tp_0":"0",
	"mst_ver_0":"null",
	"mst_tp_1":"0",
	"mst0dAtls_ca_cntpasswd":"<secret>",
	"md":"0",
	"random":"0",
	"wfb64":"1",
	"stat":"2",
	"token":"<secret>",
	"region":"null",
	"reg_key":"null",
	"dns_prio":"0^Atimer_arr08Atls_ca_cnt0fBastro_timer{abi",
	"id":"<secret>",
	"swv":"1.1.7",
	"bv":"40.00",
	"mst_ver_1":"null",
	"mst_tp_2":"0",
	"mst_ver_2":"null",
	"mst_tp_3":"0",
	"mst_ver_3":"null }<secret>",
	"mode":"rw",
	"property":"{type"
}

(True) success!
Going to do erase, start 1904640, sec count 1!
Erasing sector 1904640... ok! 
All selected sectors erased!

Now will also write OBK config...
Long name from CFG: OpenBK_E2D100031
Short name from CFG: obk_E2D100031
Web Root from CFG: https://openbekeniot.github.io/webapp/
Writing config sector 0x1D1000...Writing file data to chip successs.