NanoVNA - Very tiny handheld Vector Network Analyzer

About

NanoVNA is very tiny handheld Vector Network Analyzer (VNA). It is standalone with lcd display, portable device with battery. This project aim to provide an RF gadget but useful instrument for enthusiast.

This repository contains source of NanoVNA firmware.

Prepare ARM Cross Tools

Install cross tools and firmware updating tool. gcc-4.9 is required.

$ brew tap px4/px4
$ brew install gcc-arm-none-eabi-49
$ brew install dfu-util

Otherwise, use toolchains included inside LPCxpresso. Like this.

$ PATH=$PATH:/Applications/lpcxpresso_7.8.0_426/lpcxpresso/tools/bin

Build firmware

Fetch ChibiOS submodule into tree.

$ cd nanovna
$ git submodule update --init --recursive

Just make in the top directory.

$ make

Flash firmware

Boot MCU in DFU mode. To do this, jumper BOOT0 pin at powering device. Then, burn firmware using dfu-util via USB.

$ dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D build/ch.bin

Control from PC

NanoVNA is able to work standalone, but also be controlled via USB serial interface from PC. There are sample scripts in python directory.

Preparation.

$ pip install numpy
$ pip install scikit-rf   

Plot reflection LOGMAG.

$ cd python
$ ./nanovna.py -p

Plot transmission LOGMAG.

$ ./nanovna.py -p -P 1

Plot smithchart.

$ ./nanovna.py -s

Show usage.

$ ./nanovna.py -h

To use NanoVNA from Jupyter notebook, see this page.

Note

Hardware design material is disclosed to prevent bad quality clone. Please let me know if you would have your own unit.

Reference

• Schematics
• PCB Photo
• Block Diagram
• Kit available from https://ttrf.tk/kit/nanovna
• Credit: @edy555

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