#hsmm — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #hsmm, aggregated by home.social.
-
#OpenHardware #OpenSource #Internet #HamRadio#NPR (New Packet Radio) is a custom #radio protocol, designed to transport bidirectional #IP trafic over 430MHz radio links ( #HamRadio frequencies 420-450MHz ). This protocol is optimized for "point to multipoint" topology, with the help of managed #TDMA.
https://hackaday.io/project/164092-npr-new-packet-radio
Bitrate is 50 to 500kbps (net, effective bitrate), depending on the RF bandwidth chosen.
The radio modem is cheap (~80$) and home-made, with a 433MHz #ISM module inside (flexible enough to be tuned over the whole 420-450MHz band). The modem is connected locally with #Ethernet, therefore no specific software is needed on PC.
The modem is easy to build and reproduce.
You can add a #DMR radio amplifier in order to achieve 20W radio power or more.
The main usage is an extension of #HSMM - #Hamnet - #AREDN networks.
All the project is open-source : hardware, software, protocol specification. -
My old #hsmm routers on the way to the dump. :alex_sob: I had my fun 10 years ago. Bye