Just got my OVMS the other day and I've been setting it up. It's been going pretty well, and I thought I had it setup enough to connect it to my car (fiat 500e) and start reading/logging etc. But I've run into an issue. The simcom module will continuously loop startup due to overvoltage detection while plugged into the OBDII Port. USB powers up just fine and reads/transmits correctly.
Searching didn't really show me anyone else with this issue, so i'm not sure where else to go.