@rdjarvis , I received the M0138 ESC that you sent back (reported that you were unable to communicate with the ESC).
The issue was that the baud rate in ESC params was set to 2.5Mbit instead of 250K by accident, so our auto-scan in ESC tools could not detect the ESC (and VOXL2 DSP does not support 2.5Mbit).
We will fix this in future ESC firmware to prevent accidental setting of unsupported baud rates. Sorry about that.
Alex