BL602 goes offline randomly

[CommanderRedYT]

Describe the bug
I have had this happen a couple of times. My BL602-powered LED Controller randomly disconnects from the wifi (when I connect it in the Cube IDE there are plenty of wifi deauth errors) and never comes online again. Also, it fails to open a hotspot.

The only solution I ever found was to reflash the firmware. Somehow, that always worked. (Power cycling never worked)

Firmware:

• Version: Happened to all versions I tried released in past ~2 years
• Device?
• Chip/model: BL602
• Device config?

To Reproduce
Steps to reproduce the behavior:

1. Install the firmware
2. Wait between couple days and multiple months (very random)
3. The device will disconnect forever during the night when you are in your bed and nothing with the wifi happens

Additional context
What confuses me is that it does not even try to open a hotspot. Also, tried it with my wifi being in WPA2 only, WPA2+3, turning off 5GHz with same ssid etc., but nothing ever helped. Basically at this point I have soldered on some pins so I can easily plug in my flasher and reflash it when needed...

[openshwprojects]

Hey, is it with MQTT connection on or without it?

But come to think about it... I haven't seen a crash that required a reflash yet. Maybe you would be able to take a flash capture (read) before and after the crash? So we can tell what's corrupt?

[CommanderRedYT]

I have enabled MQTT and it should be connected to my MQTT server. But it also vanishes from the network (cannot access its webpage anymore).

I can try taking a flash capture when it occurs again, but this could be weeks or months in the future. It is very unpredictable when it happens, only that it happens when I actually need it to work.