is a firmware replacement for the popular TinyTrak line of APRS transmitters.
It creates an easy way to send any simple text message as an AX.25 packet transmission.
ASCII text is sent to the TinyPack via the serial port J2 in one of several baud rates.
Once a complete message is received, TinyPack will key a radio connected to the radio port
J1 and send the message as a UI packet. Messages can be up to 80 characters long, and
should be terminated with a carriage return or line feed character, similar to the Enter
key on a keyboard. The TinyPack will wait for a clear channel before sending the information.
TinyPack was originally created to allow Davis Weather Stations with the Weather Link APRS
adapter to transmit weather data to the APRS network without the need for a full TNC
(terminal node controller). TinyPack can be used by anyone wanting an easy way to
send out AX.25 UI packets over a radio. All packet parameters are set using a simple
Configuration program, and saved in the TinyPack chip.
It is a construction project based on the
and provides an inexpensive way to transmit packet data without the need for a full TNC.
TinyPack Kit and Case - $33.
Includes a TinyPack chip, PCB, pre-cut case, and all components excluding cables.
TinyPack Built and Tested with Case - $42.
For those not interested in soldering together the kit.
TinyPack Chip - $18.
With this chip, a TinyTrak, TinytrakII, or TinyTrak3 can be converted to a TinyPack.
Radio and Power Cables available for many common radios. Click
After ordering a kit or a chip, be sure to download
the configuration software and documentaion.
Right click the link and choose "Save As..."
Please do not distribute TinyPack or TinyTrak software, firmware, or documentation without
written permission from the author.
TinyTrak Group at Yahoo! is very active, and many of the posts may be applicable to TinyPack.
Read through the archives for help, or post questions to the members of the group.
You can also send questions via eMail to