CubeSatSim, the AMSAT CubeSat Simulator

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CubeSatSim

This is an old version of the CubeSatSim software that uses the rpitx library to send APRS telemetry.

The CubeSat Simulator https://github.com/alanbjohnston/CubeSatSim/wiki is a low cost satellite emulator that run on solar panels and batteries, transmits UHF radio telemetry, has a 3D printed frame, and can be extended by additional sensors and modules. This project is sponsored by the not-for-profit Radio Amateur Satellite Corporation, AMSAT®.

This is not the latest version of the CubeSatSim - look for the master branch https://github.com/alanbjohnston/CubeSatSim

See the Wiki Software Install page for more details: https://github.com/alanbjohnston/CubeSatSim/wiki/Software-Install. To build and run the software on a Raspberry Pi 3B, 3B+, or Pi Zero W:

git clone http://github.com/alanbjohnston/CubeSatSim.git

cd CubeSatSim

Edit the afsk/main.c file to set your amateur radio callsign, then

make rebuild

To hear CW telemetry (Morse code), tune your radio or SDR to 435.297 MHz and enter:

./radiocw

To stop, Ctrl-C. To hear AFSK telemetry (X.25 data), your radio or SDR to 440.389 MHz FM, and you should receive telemetry from the CubeSat Sim:

./radioafsk

This code uses the Brandenburg Tech Digital Transceiver, based on DigitalTxRxRP https://brandenburgtech.wordpress.com/

This repository contains:

afsk - Code that sends telemetry in 1k2 AFSK X.25 format
arduino - Sample Arduino sketches to show how payload sensors can be interfaced to CubeSat Simulator
ax5043 - Source for a library of functions to communicate with the AX5043 and configure the AX5043.
cw - Code that sends telemetry in CW (Morse code) using AO-7 format
libs - External libraries
python - Python code for reading I2C sensors for current and temperature
spreadsheet - Spreadsheets for decoding and analyzing the Simulator telemetry (see https://github.com/alanbjohnston/CubeSatSim/wiki/Decoding-Telemetry for details)
wav - Wave audio files of CW or AFSK telemetry for listening or transmitting usng a CubeSat Simulator Lite
demo.sh - a shell script to run the Simulator on boot using systemd (see https://github.com/alanbjohnston/CubeSatSim/wiki/Software-Install#autoboot-configuration for how to configure the Pi)