Thanks for the link - worked perfectly! I just put the following together as I managed to get it all up and running on a Fire Tablet, rather than a standard Android tablet.
Using NanoVNA with Amazon Fire Tablet 7 (9th generation) running OS 7.3.1.5
You need to be able to install Google Playstore. There are plenty of websites telling you how to do it, such as:
Load Chrome browser onto tablet.
Instructions here () but ensure you put this in Chrome chrome://flags/#enable-experimental-web-platform-features and Enable the flag for experimental procedures.
Then type this into Chrome and bookmark it:
Use an OTG connector (this is the one I have: ) and the long USB-to-C cable to connect to the NanoVNA. Swoitch on the NanoVNA and you should be able to connect and see the screen update on the tablet.
The other thing you can do from your Fire Tablet is update the NanoVNA firmware. I used the STMDfuUsb software from
Download the latest firmware onto your tablet and unzip it (B1 Free Archiver works well, free Amazon App). Run the STMDfuUsb software and connect to NanoVNA via your OTG lead. Put the NanoVNA into DFU mode through the menu (or via hardware) and it should connect. Select ¡®Load file to flash¡¯ and find your ¡®ch.hex¡¯ file, select it and flash it. The programmer then tells you how many times you can use it again. It starts at 25, so that means I can flash another 24 versions of firmware which seems pretty good to me.
I¡¯m by no means technically competent with linux/DFU, etc, and so I¡¯m pretty pleased I managed to do the above and it works.
Hope this helps others link their NanoVNAs with these cheap little Amazon tablets.
Regards,
Mike
MM0GUX
