I add Serial connection support to my firmware (can use v1.0.39 from here
/g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware):
You need select CONFIG->CONNECTION->SERIAL
Also set speed CONFIG->CONNECTION->SERIAL SPEED
Possibly switch in any time, setting store in config (CONFIG->SAVE)
I test HC-05 Bluetooth module on speed 115200 all work.
!!! Need configure HC-05 for speed (see HC-05 manual) before install (default speed 38400). In CPU program possible select any speed (it speed over Bluetooth to HC-05 module), but on nanoVNA need select HC-05 serial speed setting.
Now if i connect to NanoVNA by USB i send command to HC-05 (or any module connected to serial) from NanoVNA console (need select connection USB and select correct speed for serial):
usart "AT+VERSION?"
See console log:
03.102 tx: usart "AT+VERSION?"
03.116 rx: usart "AT+VERSION?"
03.310 rx: +VERSION:2.0-20100601
03.314 rx: OK
03.607 rx: ch>
03.116 rx: usart "AT+VERSION?" -> This NanoVNA echo command answer
03.310 rx: +VERSION:2.0-20100601 - > This HC-05 answer translated to console
03.314 rx: OK - > This HC-05 answer translated to console
03.607 rx: ch> -> This NanoVNA ready console input
