HF radio is a useful tool for bridging local line of sight Reticulum networks across vast distances over a direct point to point connection. Reticulum only requires a 500 bit per second connection, which is easily achievable over HF. The main drawback to using HF is the limited bandwidth available.

Using propogation modes like NVIS can overcome the rapidly changing propogation conditions and are ideal for briding regional networks within the range of 0 - 500 kilometers ( 0 to 300 miles). NVIS can also accomodate higher bandwidths when compared to traditional HF modes of propogation.

https://github.com/RFnexus/modem73

Reticulum supports most data modems through the TCPClientInterface with KISS_FRAMING enabled or through the serial interface

• https://reticulum.network/manual/interfaces.html#tcp-client-interface

1. modem73 (Recommended) https://github.com/RFnexus/modem73 Plug and play with the modem73interface https://github.com/RFnexus/modem73interface/
2. fldigi: https://github.com/w1hkj/fldigi (OFDM-500 and OFDM-750 have good performance over NVIS links)