Router mode makes node unrecoverable

Hi,
I have set up a node on my roof, attached to a Raspberry Pi that is also on my roof running an ADS-B feeder. The node was accessible from the CLI and the web interface over wifi until I switched it to the Router role with serial output disabled. Now, it no longer shows up with ‘lsusb’, it doesn’t respond to the meshtastic CLI, and it no longer connects to wifi. The node does show up as a peer on other nodes.

Is there any way to reconfigure it or even factory reset it without bringing it down and reflashing it ?

If you disabled serial output and set it to Router (which turns off BLE and WiFi) you can’t connect to it anymore. If you have another LoRa node and you have remote admin configured, you could enable serial again, otherwise you have to reflash.