On 8/6/20 12:30 AM, OneOfEleven wrote:
On Wed, Aug 5, 2020 at 04:27 PM, Piero Tognolatti wrote:
is anyone able to implement a new feature in the nanoVNA menu?? I need
to locate the nanoVNA inside a mokup of a cubesat to take S11
measurement for a while (10 minutes, for example). I cannot use have any
cable running out from the satellite (to not disturb measurement), so I
would like to set the nanoVNA in order to take and store measurements,
for example a measurement every minute.
Is it a dream? Is there anyone able to create this feature?
That could be done Piero if you have an SD card socket fitted on your NanoVNA. Does your VNA have the SD card socket fitted ?
Could add a firmware option to record the measurement onto an SD card every so often easily enough, though the problem we have with the small NanoVNA now is that we've run out of flash area to add more options/features, but for your needs a firmware could be compiled with other features disabled in order to make room.
Another option would be to enable one of the hardware serial ports in the firmware on the VNA CPU, and then attach say a cheap (HC5 as an example) serial port bluetooth module to the VNA board.
I think separating the "instrument functions" (on the nanoVNA) and the "data collection funtions" (on the Pi) is actually how you want to do it.
Focus on instrument capability, not data logging. There's myriad different data logging applications, and most of them will not want "snapshot ever N seconds" - often, there will be other things that need to happen (external configuration of the unit under test).
