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TinyPack 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 TinyTrak3, and provides an inexpensive way to transmit packet data without the need for a full TNC.

Add To Cart TinyPack Kit and Case - $33. Includes a TinyPack chip, PCB, pre-cut case, and all components excluding cables.
Add To Cart TinyPack Built and Tested with Case - $42. For those not interested in soldering together the kit.
Add To Cart 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 HERE!

After ordering a kit or a chip, be sure to download the configuration software and documentaion.
Download TINYPACK.ZIP 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.
The 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 .