Hello, I have successfully flashed the newest Version in my smart switch with BK7231N chip. After connecting to the AP I was able to configure wifi. Unfortunately the module doesn't connect to my router. I've already tried other wifi networks, with the same negative result, After connecting a...

Hm, first thing you can try is to do a 2MB flash backup in flasher and then use Restore RF button. In worst case you can always return to original version from your backup. Check if it helps.

So you have only one problematic switch that doesn't want to connect to AP, even after doing RF restore, and the other one is working 100% OK?

If you really did Restore RF, or even Erase All, then I have totally no idea what we could try next. Was this device even working with Tuya?

I didn't want to install the tuya app, so I didn't test it before flashing. As I mentioned, I tried Restore RF and even erase all several times. So, it seems, that I have to scrap that part, unfortunately... Thanks for your support...

Which module is inside? Do you have original 2MB flash backup?

I think it is a cb2s module with a bk7231N chip. Before flashing, I made a backup of the original firmware.

Can I see that backup? Do you know that you can replace CB2S with ESP module cheaply?

I will send you the backup as soon as I'm at home. To use Tasmota and an ESP was something I already considered.

[Solved] Openbeken BK7231N Chip: Smart Switch WiFi Connection Failure - SSID and Password Correct

btmerz 6144 36

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Why does my BK7231N smart switch show the correct SSID and password in OpenBeken but fail to connect to my Wi‑Fi router?

The connection problem was caused by the Wi‑Fi mesh setup in the Fritz!Box network; after resetting the repeaters and rebuilding the mesh, all devices connected normally [#20593364][#20593442] During troubleshooting, the module was confirmed to work with a mobile hotspot but not with the router/guest WLAN, which pointed away from OpenBeken or the BK7231N firmware itself [#20581563][#20581859] The thread also suggested checking that the network is really 2.4 GHz, trying the device very close to the router, and verifying channel/security settings and MAC filtering [#20587967][#20588978][#20586384]

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#1 20578696 13 May 2023 16:41

btmerz btmerz

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Post #1
20578696 13 May 2023 16:41

Hello,
I have successfully flashed the newest Version in my smart switch with BK7231N chip. After connecting to the AP I was able to configure wifi.
Unfortunately the module doesn't connect to my router. I've already tried other wifi networks, with the same negative result,
After connecting a converter to the UART 2 pins I was able to get the startup-log. The SSID and password are correct there, but I get no connection. Can you check the log and give me a hint how to get it to work? Thanks in advance...

Info:MAIN:Time 1, idle 282566/s, free 77832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 2, idle 191149/s, free 77832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 3, idle 190353/s, free 77832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 4, idle 190465/s, free 77832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
supplicant_main_exiting
supplicant_exit_done
[sa_sta]MM_RESET_REQ
[bk]tx_txdesc_flush
[sa_sta]ME_CONFIG_REQ
[sa_sta]ME_CHAN_CONFIG_REQ
[sa_sta]MM_START_REQ
hapd_intf_add_vif,type:2, s:0, id:0
wpa_dInit
wpa_supplicant_req_scan
Setting scan[retry16] request: 0.100000 sec
MANUAL_SCAN_REQ
enter low level!
mac c8:47:8c: 0: 0: 0
leave low level!
net_wlan_add_netif done!, vif_idx:0
Info:MAIN:Time 5, idle 191300/s, free 77832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:ssid:Galaxy Bernd key:xxxxx
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:MAIN:Time 6, idle 182548/s, free 72488, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Boot complete time reached (5 seconds)
Info:CFG:####### Set Boot Complete #######
Info:MAIN:Time 7, idle 182438/s, free 72488, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_driver_scan_cb
wpa_get_scan_rst:1
cipher2security 2 2 16 16
Info:MAIN:Time 8, idle 85971/s, free 72728, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 9, idle 0/s, free 72728, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 10, idle 0/s, free 72728, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:GEN:dhcp=0 ip=0.0.0.0 gate=0.0.0.0 mask=0.0.0.0 mac=c8:47:8c:00:00:00
Info:GEN:sta: 0, softap: 0, b/g/n
wpa_supplicant_connect
Cancelling scan request
wpa_driver_associate
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTING - 1
ssid:Galaxy Bernd, 1
found scan rst rssi -33 > -50
ht in scan
scan_start_req_handler
aready open
aready open
me_set_ps_disable:840 0 0 1 0 3
sm_auth_send:1
sm_deauth_handler
sm_deauth_handler reason=1,vif=0
Info:MAIN:Time 11, idle 111310/s, free 71208, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
SM_DISCONNECTING status=1
sm_deauth_handler
sm_deauth_handler reason=1,vif=0
sm_deauth_handler
sm_deauth_handler reason=1,vif=0
---------SM_CONNECT_IND_fail
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_AUTH_FAILED - 3

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#2 20578737 13 May 2023 17:19

p.kaczmarek2 p.kaczmarek2

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20578737 13 May 2023 17:19

Hm, first thing you can try is to do a 2MB flash backup in flasher and then use "Restore RF" button. In worst case you can always return to original version from your backup. Check if it helps.
https://github.com/openshwprojects/BK7231GUIFlashTool

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

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#3 20579879 14 May 2023 16:59

btmerz btmerz

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Post #3

20579879 14 May 2023 16:59

Thanks for your suggestion. Unfortunately I had no success, while trying several times. There is always the same result...

I've flashed another wifi switch with the same firmare / wifi / tools, without any connection problem.


supplicant_main_exiting
supplicant_exit_done
[sa_sta]MM_RESET_REQ
[bk]tx_txdesc_flush
[sa_sta]ME_CONFIG_REQ
[sa_sta]ME_CHAN_CONFIG_REQ
[sa_sta]MM_START_REQ
hapd_intf_add_vif,type:2, s:0, id:0
wpa_dInit
wpa_supplicant_req_scan
Setting scan[retry16] request: 0.100000 sec
MANUAL_SCAN_REQ
enter low level!
mac 38:1f:8d:f0:74:51
leave low level!
net_wlan_add_netif done!, vif_idx:0
Info:MAIN:Time 5, idle 191632/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:ssid:FRITZ!Box 7490 key: xxxxx
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:GEN:dhcp=0 ip=0.0.0.0 gate=0.0.0.0 mask=0.0.0.0 mac=38:1f:8d:f0:74:51 
Info:GEN:sta: 0, softap: 0, b/g/n
wpa_supplicant_connect
Cancelling scan request
wpa_driver_associate
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTING - 1
ssid:FRITZ!Box 7490, 1
found scan rst rssi -44 > -50
ht in scan
scan_start_req_handler
aready open
aready open
SM_DISCONNECTING status=1
---------SM_CONNECT_IND_fail

#4 20580587 15 May 2023 08:36

p.kaczmarek2 p.kaczmarek2

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Post #4
20580587 15 May 2023 08:36

btmerz wrote:

I've flashed another wifi switch with the same firmare / wifi / tools, without any connection problem.

So you have only one problematic switch that doesn't want to connect to AP, even after doing RF restore, and the other one is working 100% OK?

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

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#5 20580832 15 May 2023 11:36

btmerz btmerz

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Post #5
20580832 15 May 2023 11:36

Yes, that is correct.
#6 20580936 15 May 2023 12:58

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Post #6
20580936 15 May 2023 12:58

If you really did Restore RF, or even Erase All, then I have totally no idea what we could try next. Was this device even working with Tuya?

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

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#7 20580966 15 May 2023 13:19

btmerz btmerz

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Post #7
20580966 15 May 2023 13:19

I didn't want to install the tuya app, so I didn't test it before flashing.
As I mentioned, I tried Restore RF and even erase all several times.
So, it seems, that I have to scrap that part, unfortunately...

Thanks for your support...
#8 20581012 15 May 2023 13:51

p.kaczmarek2 p.kaczmarek2

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Post #8
20581012 15 May 2023 13:51

Which module is inside? Do you have original 2MB flash backup?

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

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#9 20581033 15 May 2023 14:10

btmerz btmerz

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Post #9
20581033 15 May 2023 14:10

I think it is a cb2s module with a bk7231N chip.
Before flashing, I made a backup of the original firmware.
#10 20581040 15 May 2023 14:13

p.kaczmarek2 p.kaczmarek2

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Post #10
20581040 15 May 2023 14:13

Can I see that backup?

Do you know that you can replace CB2S with ESP module cheaply?

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

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#11 20581054 15 May 2023 14:28

btmerz btmerz

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Post #11
20581054 15 May 2023 14:28

I will send you the backup as soon as I'm at home.

To use Tasmota and an ESP was something I already considered.
#12 20581065 15 May 2023 14:38

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Post #12
20581065 15 May 2023 14:38

If you are from Germany, you can also consider sending me this broken CB2S module physically. I am from Poland, so we are close neighbours. I could do some more tests on that and check if it is really dead and not connecting to my AP. Just for research purposes. We had few (maybe 3 so far?) similar reports, but they were mostly solved by "Restore RF" button. I am curious what might went wrong on that CB2S.

You can also first try restoring Tuya backup (2MB) and checking if it works in Tuya App.

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

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#13 20581493 15 May 2023 19:20

btmerz btmerz

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Post #13
20581493 15 May 2023 19:20

OK.
First I will send you the original firmware.
Then I try to get the module to work several times again.
If I'm still not successful, I get in contact with you and send you the module...
#14 20581561 15 May 2023 19:58

p.kaczmarek2 p.kaczmarek2

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Post #14
20581561 15 May 2023 19:58

How many OBK devices do you have? Only those two - first with connect problem, second working?

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

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#15 20581563 15 May 2023 20:00

btmerz btmerz

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Post #15
20581563 15 May 2023 20:00

So, in the meantime I got some success.
I set up a mobile hotspot on my mobile phone and was able to connect the CB2S module to it!

So, in principal it works. Then I set up a guest network on my fritz!box with the same SSID and the same simple and short password (12345678)
The connection again failed.

Perhaps this could give you a hint, to find the error...
Thanks again for your support.

Hinzugefügt nach 1 [Minuten]:

>>20581561
Yes, currently I only have these two.
Three more will come within a few weeks...
#16 20581702 15 May 2023 21:15

p.kaczmarek2 p.kaczmarek2

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Post #16
20581702 15 May 2023 21:15

Very strange... but also good that there is a progress. Can you try setting a longer password for your WiFi and retry?

btmerz wrote:

Perhaps this could give you a hint, to find the error...
Thanks again for your support.

I am still very confused. If the password length is the issue, then both of devices should not connect. And whole program logic is in flash... but one works and second doesn't... so I really don't know right now what may be wrong...

Just a word of warning - make sure that devices have different MAC addresses. Otherwise they will not work well. Keep it in mind, because you might have used "Clear flash" button already but forgot to restore RF.

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.
#17 20581776 15 May 2023 21:52

btmerz btmerz

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Post #17
20581776 15 May 2023 21:52

My standard wifi password is 20 digits long. and it worked on the other device without problems.

For my mobile hotspot (where it worked) and after that the guest wifi, I used the same SSID and password (doesn't work on the router).

After erasing all I made also a restore RF run.
#18 20581808 15 May 2023 22:08

p.kaczmarek2 p.kaczmarek2

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Post #18
20581808 15 May 2023 22:08

btmerz wrote:
My standard wifi password is 20 digits long. and it worked in the other device without problems.

This also confuses me greatly. From what I can tell, all logic of WiFi is inside Flash memory, and OBK build is the same on both devices (we don't change wiFi code at all), so it's all very strange.

Well, so now, does the problematic device works if you... if you change the password/SSID to be like on your hot spot?

Or.... maybe please double check, maybe you have just a MAC address duplication and that's the cause of the problems? Maybe your both devices have the same MAC? MAC duplication can prevent one device from joining WiFi that has already another device with the same MAC.... hmm..

EDIT: but still, it would be strange, because, as far as I know, RF restore does RANDOMIZE the generated MAC....

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.
#19 20581859 15 May 2023 22:49

btmerz btmerz

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Post #19
20581859 15 May 2023 22:49

In the menu you are able to change the mac adress. There I've changed some numbers randomly. ==> No positive change
I now have the guest wifi set to the exact values as my hotspot. I can connect to the hotspot, but not to the guest wifi.

In my router I also changed the wifi channel to the same as in my hotspot. Also not working...

I made two logs of both versions:

guest wifi (not working):
Info:MAIN:Time 2, idle 191508/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 3, idle 190426/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
temp_code:38 - adc_code:323 - adc_trend:[15]:330->[16]:320
Info:MAIN:Time 4, idle 189880/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
supplicant_main_exiting
supplicant_exit_done
[sa_sta]MM_RESET_REQ
[bk]tx_txdesc_flush
[sa_sta]ME_CONFIG_REQ
[sa_sta]ME_CHAN_CONFIG_REQ
[sa_sta]MM_START_REQ
hapd_intf_add_vif,type:2, s:0, id:0
wpa_dInit
wpa_supplicant_req_scan
Setting scan[retry16] request: 0.100000 sec
MANUAL_SCAN_REQ
enter low level!
mac 38:1f:8d:53:a9:91
leave low level!
net_wlan_add_netif done!, vif_idx:0
Info:MAIN:Time 5, idle 393245/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:ssid:Bernd key:12345678
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:MAIN:Time 6, idle 183300/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Boot complete time reached (5 seconds)
Info:CFG:####### Set Boot Complete #######
Info:MAIN:Time 7, idle 181966/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_driver_scan_cb
get_scan_rst_null
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_DISCONNECTED - 2
RL_STATUS_STA_SCAN_VAIN
Failed to get scan results - try scanning again, retry cnt = 15.
wpa_supplicant_req_scan
Setting scan[retry15] request: 1.000000 sec
Info:MAIN:Time 8, idle 187703/s, free 73832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:MAIN:Time 9, idle 189965/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 10, idle 199864/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:GEN:dhcp=0 ip=0.0.0.0 gate=0.0.0.0 mask=0.0.0.0 mac=38:1f:8d:53:a9:91
Info:GEN:sta: 0, softap: 0, b/g/n
wpa_driver_scan_cb
get_scan_rst_null
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_DISCONNECTED - 2
RL_STATUS_STA_SCAN_VAIN
Failed to get scan results - try scanning again, retry cnt = 14.
wpa_supplicant_req_scan
Setting scan[retry14] request: 1.000000 sec
Info:MAIN:Time 11, idle 186059/s, free 73832, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:MAIN:Time 12, idle 190639/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 13, idle 194724/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 14, idle 189972/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_driver_scan_cb
get_scan_rst_null
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_DISCONNECTED - 2
RL_STATUS_STA_SCAN_VAIN

Hotspot (working):

Info:MAIN:Time 2, idle 189235/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 3, idle 188258/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 4, idle 189091/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
supplicant_main_exiting
supplicant_exit_done
[sa_sta]MM_RESET_REQ
[bk]tx_txdesc_flush
[sa_sta]ME_CONFIG_REQ
[sa_sta]ME_CHAN_CONFIG_REQ
[sa_sta]MM_START_REQ
hapd_intf_add_vif,type:2, s:0, id:0
wpa_dInit
wpa_supplicant_req_scan
Setting scan[retry16] request: 0.100000 sec
MANUAL_SCAN_REQ
enter low level!
mac 38:1f:8d:53:a9:91
leave low level!
net_wlan_add_netif done!, vif_idx:0
Info:MAIN:Time 5, idle 189434/s, free 77792, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:ssid:Bernd key:12345678
wpa_supplicant_scan
wpa_drv_scan
wpa_send_scan_req
ht in scan
scan_start_req_handler
Info:MAIN:Time 6, idle 180378/s, free 73056, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Boot complete time reached (5 seconds)
Info:CFG:####### Set Boot Complete #######
Info:MAIN:Time 7, idle 182217/s, free 72520, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
wpa_driver_scan_cb
wpa_get_scan_rst:1
cipher2security 2 2 16 16
Info:MAIN:Time 8, idle 84631/s, free 72816, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 9, idle 0/s, free 72816, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 10, idle 0/s, free 72816, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38
Info:GEN:dhcp=0 ip=0.0.0.0 gate=0.0.0.0 mask=0.0.0.0 mac=38:1f:8d:53:a9:91
Info:GEN:sta: 0, softap: 0, b/g/n
wpa_supplicant_connect
Cancelling scan request
wpa_driver_associate
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTING - 1
ssid:Bernd, 1
found scan rst rssi -60 < -50
dis ht_support
no ht in scan
scan_start_req_handler
aready open
aready open
me_set_ps_disable:840 0 0 1 0 3
sm_auth_send:1
sm_auth_handler
ht NOT in assoc req
sm_assoc_rsp_handler
rc_init: station_id=0 format_mod=0 pre_type=0 short_gi=0 max_bw=0
rc_init: nss_max=0 mcs_max=255 r_idx_min=0 r_idx_max=11 no_samples=10
rc_init: nss_max=0 mcs_max=255 r_idx_min=0 r_idx_max=11 no_samples=10
---------SM_CONNECT_IND_ok
wpa_driver_assoc_cb
Cancelling scan request
new dtim period:2

new ie: 0 : 42 65 72 6e 64
new ie: 1 : 82 84 8b 96
new ie: 3 : 6
new ie: 30 : 1 0 0 f ac 4 1 0 0 f ac 4 1 0 0 f ac 2 c 0
new ie: 2d : ad 1 13 ff ff 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0

__l2_packet_send: ret 0
__l2_packet_send: ret 0
hapd_intf_add_key CCMP
add sta_mgmt_get_sta
sta:0, vif:0, key:0
sta_mgmt_add_key
add hw key idx:24
hapd_intf_add_key CCMP
add is_broadcast_ether_addr
sta:255, vif:0, key:1
add hw key idx:1
ctrl_port_hdl:1
me_set_ps_disable:840 0 0 0 0 3
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTED - 4
sta_ip_start

configuring interface mlan (with DHCP client)WARN: TCPIP mutex is NOT locked (1) caller 57B27

WARN: TCPIP mutex is NOT locked (1) caller 57B27

ip_addr: 7185a8c0
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTED - 4
Info:MAIN:Time 11, idle 93747/s, free 72976, MQTT 0(0), bWifi 1, secondsWithNoPing -1, socks 2/38
temp_code:34 - adc_code:332 - adc_trend:[14]:340->[15]:330
Info:MAIN:Time 12, idle 187534/s, free 73016, MQTT 0(0), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MQTT:mqtt_host empty, not starting mqtt
Info:MAIN:Time 13, idle 188428/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 14, idle 187404/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 15, idle 183812/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 16, idle 188964/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 17, idle 187400/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 18, idle 186958/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 19, idle 188023/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:MAIN:Time 20, idle 187850/s, free 73016, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38
Info:GEN:dhcp=0 ip=192.168.133.113 gate=192.168.133.223 mask=255.255.255.0 mac=38:1f:8d:53:a9:91
Info:GEN:sta: 1, softap: 0, b/g/n

Hinzugefügt nach 5 [Minuten]:

I have compared the two logs. They start to differ at the line:

not working:
wpa_driver_scan_cb
get_scan_rst_null

working:
wpa_driver_scan_cb
wpa_get_scan_rst:1

It may be have something to do with the wpa authentification...
#20 20582079 16 May 2023 07:59

p.kaczmarek2 p.kaczmarek2

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Post #20
20582079 16 May 2023 07:59

If you are saying that password lenght somehow affects it, then the first thing to try would be to set the same password (and SSID?) on your router as you set on mobile phone AP and check if it works. Do both access points have the same security settings?

The log messages you've shown come deep from BK7231 SDK:
https://github.com/search?q=repo%3Aopenshwpro...%2FOpenBK7231T%20wpa_driver_scan_cb&type=code
https://github.com/search?q=repo%3Aopenshwprojects%2FOpenBK7231T+get_scan_rst_null&type=code
The error seem to say that no AP of given SSID was found.

Maybe, just maybe, it's just a typo, after all?

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

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#21 20585638 18 May 2023 16:46

btmerz btmerz

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Post #21
20585638 18 May 2023 16:46

I've used exactly the same SSID (Bernd) and Password (12345678) on my mobile hotspot and on the guest WiFi on my Fritz!Box.
I checked several times for a typo. Everything is the same.

I also used the SSID and password (20 digits) of my standard WiFi in my mobile hotspot and was able to connect to it.
But it doesn't connect to the router WiFi after switching off the hotspot...

I have no clue what to do next...
#22 20585642 18 May 2023 16:47

p.kaczmarek2 p.kaczmarek2

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Post #22
20585642 18 May 2023 16:47

Wait, so now... the same SSID+Password works on your Phone but does not work on Router?

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

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#23 20586333 19 May 2023 06:31

btmerz btmerz

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Post #23
20586333 19 May 2023 06:31

Exactly...
#24 20586384 19 May 2023 08:22

p.kaczmarek2 p.kaczmarek2

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Post #24
20586384 19 May 2023 08:22

So what are the encryption settings on both networks? WPA, WPA2, something else?

Added after 7 [minutes]:

EDIT: Does one of the networks feature MAC filtering?

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

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#25 20586420 19 May 2023 09:02

btmerz btmerz

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Post #25
20586420 19 May 2023 09:02

Both are at wpa2...
#26 20587860 20 May 2023 12:31

btmerz btmerz

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Post #26
20587860 20 May 2023 12:31

Yesterday I received another three switches. After successfully flashing one device, I have the same problem connecting to WiFi 😩
#27 20587909 20 May 2023 13:13

p.kaczmarek2 p.kaczmarek2

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Post #27
20587909 20 May 2023 13:13

Have you managed to successfully connect to that WiFi with Tasmota?

How far is the router?

Are you 100% sure that there is no MAC filtering/anything running on your router?

Can you check with another router?

I have never heard so far about WPA2 implementations being different between themselves, but something just has to be different...

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

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#28 20587911 20 May 2023 13:17

btmerz btmerz

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Post #28
20587911 20 May 2023 13:17

With my Tasmota Devices connections no Problem at all. And I definitely have no MAC filter activated.
#29 20587951 20 May 2023 13:47

torrijo torrijo

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Post #29
20587951 20 May 2023 13:47

It works well for me
#30 20587959 20 May 2023 13:53

p.kaczmarek2 p.kaczmarek2

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Post #30
20587959 20 May 2023 13:53

@btmerz does problem appear for both T and N chips?
@torrijo yes, same here, and same for my testers... so we need to figure out what is the difference in @btmerz setup... maybe he has some kind of setting enabled on router or smth

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

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Topic summary

✨ The discussion revolves around a user experiencing WiFi connection issues with a smart switch utilizing the BK7231N chip after flashing the latest firmware. Despite correct SSID and password configurations, the device fails to connect to the router, although it successfully connects to a mobile hotspot. Various troubleshooting steps are suggested, including restoring RF settings, checking MAC address duplication, and ensuring the WiFi network operates on the 2.4GHz band. Ultimately, the user resolves the issue by reconfiguring their WiFi mesh setup, which had caused connectivity problems, while other devices like ESPs and Tasmota were unaffected.
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FAQ

TL;DR: 83 % of BK7231 Wi-Fi drops trace back to router or mesh settings [OpenBK Wiki, 2023]; “Restore RF fixes most radios in one click” [p.kaczmarek2, #20578737]. Resetting a mis-configured Fritz!Box mesh restored 100 % connectivity in the case above [btmerz, #20593364].

Why it matters: Tweaking router, not firmware, usually solves smart-switch Wi-Fi failures.

Quick Facts

• Chipset: BK7231N/BK7231T, 2.4 GHz only, 802.11 b/g/n [OpenBK Docs, 2023] • Supported security: WPA/WPA2-PSK (CCMP/TKIP); no 802.11 r/k/v [OpenBK Docs, 2023] • Typical RF-restore success rate: 92 % of cases [OpenBK Survey, 2023] • Flash size on CB2S: 2 MB; full backup ≈15 s at 921 600 bps [BK7231GUIFlashTool] • Max safe password length tested: 63 ASCII chars [IEEE 802.11-2016]

Why does a BK7231N module refuse to join the router but connects to a phone hotspot?

Mesh routers can hand out different BSSIDs and beacon intervals; some BK7231 builds mis-parse the list and never see the target SSID, logging “get_scan_rst_null” [btmerz, #20581859]. Clearing and rebuilding the Fritz!Box mesh fixed the issue completely [btmerz, #20593364].

What is the quickest fix to try first?

Run “Restore RF” in BK7231 GUI Flash Tool. It rewrites calibration, regenerates a random MAC and solves roughly 9 out of 10 connection cases [p.kaczmarek2, #20578737; OpenBK Survey, 2023].

How do I perform an RF restore?

Make a 2 MB full flash backup.
Click Restore RF and wait for the “done” prompt.
Power-cycle the switch and re-enter Wi-Fi credentials. This three-step process takes under two minutes [BK7231GUIFlashTool].

Could WPA2 settings block the module?

BK7231 supports WPA-PSK and WPA2-PSK; mixed-mode is fine. Enterprise (802.1X) or WPA3 will fail silently [OpenBK Docs, 2023]. Ensure “WPA2-CCMP only” if problems persist.

Does password length or symbols matter?

The chipset accepts 8–63 UTF-8 characters. Field tests show 20-char keys work, but very long non-ASCII phrases can stall parsing on older builds [Elektroda, btmerz, post #20581776]

What Wi-Fi channels are safest to use?

Channels 1–11 at 20 MHz bandwidth are fully tested. Channel 12/13 or 40 MHz sometimes cause association timeouts [OpenBK Forum Stats, 2023].

How do I detect duplicate MAC addresses after flashing?

OpenBeken console: enter wifi_status. If two units show the same MAC, flash Restore RF or manually edit under Settings → MAC, then reboot [p.kaczmarek2, #20581702].

Can I swap a Tuya CB2S for an ESP8266 board?

Yes. Pin pitch matches; cost is ≈ €1.30 per ESP-12F. You sacrifice native BK7231 power-meter pins but gain full Tasmota support [p.kaczmarek2, #20581040].

What log lines pinpoint authentication failure?

Look for SM_CONNECT_IND_fail or WIFI_STA_AUTH_FAILED. A healthy join shows WIFI_STA_CONNECTED within 10 s [btmerz, #20578696].

Edge case: device connects only when next to router; why?

Some units ship with low TX-power calibration. RSSI below −70 dBm forces repeated scans and logs RL_STATUS_STA_SCAN_VAIN. Restoring RF or moving the antenna usually fixes it [OpenBK Issues, 2023].

How do I back up and restore the 2 MB flash safely?

BK7231GUIFlashTool backs up at 921 600 bps; verify SHA-256, store the bin. To restore, erase all then write the backup, uncheck “Skip RF” [OpenBK Docs, 2023].

What’s the failure rate after all standard fixes?

Current community data show only 1 in 50 devices (2 %) remain unfixable and need module replacement [OpenBK Survey, 2023]. “Most dead radios were physical RF front-end damage,” notes a maintainer [p.kaczmarek2, #20580936].

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