Instructions on how to get the device working with meshtastic firmware are at https://flash.nmiot.net:3333/ at the end of https://wiki.heltec.org/docs/devices/open-source-hardware/nrf52840-series/mesh-solar/usage-guide
Only when I checked the “redifine com” box did it work for me.
@richard3366 any insights / plans how to resolve the issue at hand?
If there is faint light (e.g., at dawn), the solar panel may attempt to power the MCU directly, but the voltage is low and unstable. This can cause the nRF52840 to repeatedly power on and off, eventually leading to configuration loss or device freezing.