Option 2: Upload firmware using bootload_firmware.pyĮnsure you have Python version 3, and install pyserial. A dialog will appear asking asking if you would like to flash a new firmware. Select the serial port device /dev/ttyACM0 under the Device menu in NanoVNA-QT. Option 1: Upload firmware using NanoVNA-QT The 3GHz second-generation NanoVNA vector network analyzer is based on OwOComms S-A-A-2 design, and its performance is greatly upgraded. Once the device is in BOOTLOAD mode, you can update the firmware using either NanoVNA-QT or the bootload_firmware.py Python script. This SAA-V2 is battery powered or USB powered Built in 2000mAh battery, Could work for about 3 hours continuously, If need extra working time, It can be connected to power bank or power source.

If this is too much of a burden, you can add udev rules to block modem manager from trying to control this port. After a while the modem manager will give up and you can access the port. Note that depending on your installation's udev rules, the new serial device initially appear as an Mobile Modem (3G/4G/etc)Īnd it will not create the /dev/ttyACM0 port. On a *nix system, the current user probably needs to be part of the dialout group to allow access to the device. This should be the device-special file /dev/ttyACM0 This indicates that it is waiting for new firmware.Ĭheck for the existence of the USB serial port device.

Switch the device on (screen stays white), release the button. Press and hold down the left button (the one closest to the Port 1 or the On/Off switch).

Nanovna saa v2