Hello, i have exactly same problem as u. Crashing after 24-48h on 1.14.1 and 1.15 router firmware.
Same setup 5V 9W pannel allways connected to usb and 3.7V 3000mah Lipo battery connected to batt pads.
I’ve searched everywere couldnt find 1.14.1.1 firmware. Where did u find it ?
Thanks
No Special settings were required - Just Flash.
Have Fun!
Thanks, so it’s an alternative firmware, not an official one…
When u mean 1.15 has again same problem you mean official or alternative ?
Official for sur i have the problem…
I tried multiple versions:
1.13.0 (official) → freeze after 3 days
1.14.1 (official) → freeze after 1-2 days
1.14.1.1 (custom, see link above) → no issues, current uptime of 14 days
1.15.0 (official) → freeze after 1 day
I have 3 XIAOs in uses and both had the same issues with the original Meshcore firmware. I will stay on the custom build now, as it already includes the 2-byte feature, that was introduced in the 1.14.1 official version.
Hope this helps!
I also want to add that I also use 4 units of Sense Cap Solar Repeaters (that are build of the XIAO Pro which is simiar to the standard version) and none of these had any issues with all of the firmwares. So if you want a reliable solution maybe better go for the industrial solution.
Hi there,
Sounds to me like these builds are all using the OLD BSP.
the New solar Node is using the most current , Seeed or MT needs to check it out..
my .02
HTH
GL 
PJ 
Same problem here. Froze with LED on after a couple of weeks, reflashed to 1.15 and it occured within 24hours. Has been ok for a week or so.