HB9EGM - Matthias P. Brändli
Description: The 434 MHz LoRa APRS project that extends range by saving bytes.
Welcome to the home of APRS 434 , the 434 MHz LoRa APRS amateur radio project that extends range by saving bytes.
Unlike some other ham radio LoRa APRS projects, this white paper and project aims at deploying LoRa the way it was intended; namely by being frugal about the number of bytes put on air. Doing so, reaps a number of benefits:
In dense urban environments and/or on flat terrain, LoRa works best when the data payload is kept to a strict minimum. This can be achieved taking full advantage of all 256 characters available for transmission with LoRa. The APRS frame compression protocols presented below aim precisely at doing that; for LoRa, or any other data link with an extended character set.
HB9EGM - Matthias P. Brändli