Troubleshooting OpenBK7231 MQTT Connection Issues with Home Assistant

Hello everyone,

I’m a beginner in this field, and I’ve recently updated my smart relay switch (it’s a module like this one: https://www.elektroda.com/rtvforum/topic3912748.html) to OpenBK7231 (OpenBeken). I followed this guide to flash it.

After configuring the Wi-Fi and everything else, I can access the device through its IP address. However, I’m having trouble connecting it to the MQTT broker in Home Assistant.

I’ve double-checked the MQTT settings: username, password, and port are all configured correctly, but it still won’t connect.

Could this be a problem with my router, or does it not play a role in this communication?

Thanks in advance for your help!


AI: Could you provide any error messages or specific behavior you observe when the device attempts to connect to the MQTT broker?
Info:GEN:dhcp=0 ip=192.168.1.135 gate=192.168.1.1 mask=255.255.255.0 mac=b8:06:0d:e0:e0:3d
Info:GEN:sta: 1, softap: 0, b/g/n
Info:GEN:sta:rssi=-35,ssid=MIWIFI_YppT-EXT,bssid=0c:0e:76:98:b0:5f,channel=2,cipher_type:CCMP
Info:MAIN:Time 331, idle 183931/s, free 74904, MQTT 0(20), bWifi 1, secondsWithNoPing 261, socks 2/38
Info:MAIN:Time 332, idle 192015/s, free 74904, MQTT 0(20), bWifi 1, secondsWithNoPing 262, socks 2/38
Info:MQTT:mqtt_userName homeassistant
mqtt_pass __**password_not_changed**__
mqtt_clientID SWITCH_RELAY
mqtt_host 192.168.1.131:1883
Info:MAIN:Time 333, idle 187124/s, free 74816, MQTT 0(21), bWifi 1, secondsWithNoPing 263, socks 2/38
Info:MQTT:mqtt_connection_cb: Disconnected, reason: 5(Refused not authorized)
Info:MAIN:Time 334, idle 184062/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 264, socks 2/38
Info:MAIN:Time 335, idle 183634/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 265, socks 2/38
Info:MAIN:Time 336, idle 188894/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 266, socks 2/38
Info:MAIN:Time 337, idle 188407/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 267, socks 2/38
Info:MAIN:Time 338, idle 188393/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 268, socks 2/38
Info:MAIN:Time 339, idle 189418/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 269, socks 2/38
Info:MAIN:Time 340, idle 197257/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 270, socks 2/38
Info:GEN:dhcp=0 ip=192.168.1.135 gate=192.168.1.1 mask=255.255.255.0 mac=b8:06:0d:e0:e0:3d
Info:GEN:sta: 1, softap: 0, b/g/n
Info:GEN:sta:rssi=-34,ssid=MIWIFI_YppT-EXT,bssid=0c:0e:76:98:b0:5f,channel=2,cipher_type:CCMP
Info:MAIN:Time 341, idle 187298/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 271, socks 2/38
Info:MAIN:Time 342, idle 188309/s, free 74696, MQTT 0(21), bWifi 1, secondsWithNoPing 272, socks 3/38
Info:MAIN:Time 343, idle 189008/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 273, socks 2/38
Info:MAIN:Time 344, idle 186736/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 274, socks 2/38
Info:MAIN:Time 345, idle 190196/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 275, socks 2/38
Info:MAIN:Time 346, idle 190137/s, free 74696, MQTT 0(21), bWifi 1, secondsWithNoPing 276, socks 2/38
Info:MAIN:Time 347, idle 189986/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 277, socks 2/38
Info:MAIN:Time 348, idle 191071/s, free 74904, MQTT 0(21), bWifi 1, secondsWithNoPing 278, socks 2/38
Info:MQTT:mqtt_userName homeassistant
mqtt_pass __**password_not_changed**__
mqtt_clientID SWITCH_RELAY
mqtt_host 192.168.1.131:1883
Info:MAIN:Time 349, idle 190585/s, free 74824, MQTT 0(22), bWifi 1, secondsWithNoPing 279, socks 2/38
Info:MQTT:mqtt_connection_cb: Disconnected, reason: 5(Refused not authorized)
Info:MAIN:Time 350, idle 181841/s, free 74912, MQTT 0(22), bWifi 1, secondsWithNoPing 280, socks 2/38
AI: Can you share details about your MQTT broker configuration in Home Assistant, such as the broker address and any specific settings you have applied?
Configuration of HOME ASSISTENTE:
broker name: core-mosquitto
port: 1883
user: homeassistant
password: *****************

Configuration device:
host: same ip to access to home assistant
port: 1883
user: homeassistant
password: *****************

>>21318067
It looks like your MQTT username/password is not being accepted:

wrote:

Info:MQTT:mqtt_connection_cb: Disconnected, reason: 5(Refused not authorized)

Check your Mosquitto configuration in Home Assistant (Settings->Add Ons->Mosquitto Broker->Configuration Tab)
I also recommend downloading MQTT Explorer https://mqtt-explorer.com/
That will let you connect directly to the Mosquitto broker, which will let you validate whether your MQTT credentials are correct or not, and take OpenBK out of the loop.

It’s working now! I thought it was the MQTT broker’s username and password, but it turned out to be the credentials for logging into Home Assistant.

I have another question: after connecting the module to the Wi-Fi, the default IP address (192.168.4.1) no longer works, and I need to connect using the new IP it gets on my network. If I want to switch to a different Wi-Fi network, do I have to flash it again, or is there another way to change the Wi-Fi settings?

Thank you for your help!