In some cases the integrated bootloader of the miniVNApro is corrupt and so for the firmware update via vna/J is not working.

 

LED numbers

When I refer to LED numbers, please check this picture and the table below:

 11 09 2017 10 47 50

# Color Usage

1

Green

Analogue section activated.

To reduce power consumption during battery operation, the analogue section may be deactivated by the firmware.

2

Green

Digital section activated.

Always lit, while the miniVNApro is connected to an active USB-port or running on battery power.

3

Yellow

Li-Ion battery is being charged.

4

Yellow

Data transfer from remote PC to miniVNApro

5

Yellow

Data transfer from miniVNApro to remote PC

6

Blue

Bluetooth connection status

¬∑         Blinking - searching for counterpart

¬∑         Constant - connected

7

Blue

Bluetooth data transfer active

Verification steps

To check whether its a bootloader issue or another problem please follow these steps:

  1. Turn the miniVNApro upside down.
  2. Connect the USB port to your computer
  3. LED 4 / 5 should flicker and then are off
  4. LED 1 / 2  should be on
  5. After a second LED 1 is turned off
  6. Launch vna/J and execute a scan (reflection/transmission)
  7. LED 1 should be on and LEDs 4 / 5 should flicker
  8. After the scan LED 1 / 2 should be on
  9. Press the red button at the miniVNApro.
  10. All LEDs are off
  11. Release the red button at the miniVNApro.
  12. LED 5 should flicker and then is off
  13. LEDs 1 / 2 should be on
  14. After a second then LED 1 is turned off

The result of Step 11 is important. If LED 5 flickers right after releasing the red reset button at the vna, the booloader seems to be intact.

If the bootloader is intact, you should be able to use vna/J to update the firmware.

If not, a new bootloader has to be flashed to the miniVNApro memory. Contact me, if you need help.


You can buy the author a beer to support the further development of vna/J.

Please use this PayPal link.

Many thanks in advance for this donation!


You can contact me by email icon or via Twitter @dl2sba

2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.

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