This article will not reproduce the well-documented process for updating a NanoVNA. Regardless of choosing the Gen Hu (“hugen”) or DiSlord versions of the firmware, a new NanoVNA-H or -H4 should be updated to the latest firmware available. The DiSlord code is eventually imported back in the Gen Hu core software. The DiSlord version is the fastest changing version of the software which means new features appear quicker but more bugs could be introduced as well. The final version, and the version that this author uses and will be demonstrating, is the version by DiSlord. This software was adapted for the new circuitry in the H and H4 versions of the NanoVNA and are what are commonly found on stock devices. The H and H4 versions use Gen Hu’s fork of the software. It is updated infrequently and isn’t usable on many of the commercially sold devices. This firmware is the original and only works on the 2.8″ devices that are built to the original spec. The original firmware is the edy555 firmware. There are a few mainline forks of the firmware for the NanoVNA. This is an area of great discussion in the NanoVNA community. Once a device has been purchased, the software on the device should be upgraded to the latest version as there are continual refinements and improvements to the NanoVNA. All examples, features, and abilities discussed in this series of articles will be based on the original NanoVNA-H4. This author has not used an AURSINC edition, but the core NanoVNA contributors seem very earnest and sincere about avoiding bad quality devices so it’s unlikely they would recommend a “bad clone”. The NanoVNA project site also lists the Amazon store of the AURSINC version as a quality version and warns that others are “clones”. The “original” device is the version created and marketed by Gen Hu. The NanoVNA-H4 is currently for sale from R&L Electronics. This article and all of the remaining articles planned for this series will be using the “original” NanoVNA-H4.
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