20200501
- Support TDR up to 201 points
- Allow exiting from USB mode (hold down JOG CENTER/middle button on the device after exiting NanoVNA-QT)
- Fix numeric input (long-press JOG CENTER on the stimulus menu items to enter numeric input)
- Fix bug when all traces are disabled
To flash, hold down LEFT button and power cycle device. Use NanoVNA-QT or dfu.py to flash binary.bin.