I just picked up the JDrones UC4H Starter Combo. I had success flashing the nodes with firmware except the gpsmagbaro (using the instructions in CANbus Quadcopter using UC4H : Son of FrankenSolo, Thanks!). This always results in a “ERROR (2)” under node health. I tried this on multiple nodes as well as trying older firmware (0.27) but no luck.
Edit: This is normal behavior when a mag or baro is not found.