Automatic Packet Reporting System is a digital communications protocol that can exchanges information among large number of stations both local and global.
Connect directly with the global APRS-IS network by Internet. Messages reaching the gateways will be relayed to the APRS-IS feed.
PulseModem A can work without Internet, by connecting the audio port to your amateur radio.
The "A" of "PulseModem A" stands for APRS. Future versions of PulseModem will decode other formats.
You as a licensed Amateur Radio operators can send and receive APRS location and message.
You can connect directly with the global APRS-IS network by Internet. Messages reaching the gateways will be relayed to the APRS-IS feed.
APRS messages are short in length, in less than 100 bytes.
Messages are encoded in AX.25 protocol with Bell 202 AFSK modulation.
PulseModem A will play the encoded message through the audio port of your iOS device, to your radio.
The PulseModem A connects to the server, which you can change in settings, by TCP protocol.
The APRS network is intended for licensed amateur radio holders.
A callsign SSID identify your device, which is your ham radio callsign followed by a dash and then a number from 0 to 15 inclusive.
PulseModem A has built-in signal scope.
The RF output of your radio can be displayed nicely in the signal scope for optimal decoding.
It works equally well on both iPhone and iPad.
All the meta data of each APRS packets are decoded in a nice way
All messages are displayed in a 100KM near your current position
PulseModem A is able to do real-time decode of incoming APRS packet from your radio.