Gerrit Polder, PA3BYA.
pisstv is an attemp to use the Raspberry Pi as a slow scan television (SSTV) camera. Its intended for use by ham radio amateurs.
It mainly consists of three commands.
raspistill: to grab the image from the camera. pisstv: to convert the image to a soundfile. pifm_sstv: to transmit the soundfile over the air, e.g. on 144.5 MHz
pisstv is heavilly based on work from KI4MCW, which can be found here: https://sites.google.com/site/ki4mcw/Home/sstv-via-uc I fixed some errors and made it a little bit more flexible.
pifm_sstv is based on the work of Oliver Mattos and Oskar Weigl (http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter).
The original program was intended for transmitting broadband stereo signals. I adapted it a little bit so that the bandwidth can be set, which is very important for narrow-band ham radio transmissions. Also the timing can be tuned from the command-line, which is important for SSTV, where impropper timing results in slanted images.
sstvcatch is kind of a sstv security camera. A python script runs an endless loop, waits for image change, then transmits image data on 144.5 MHz using SSTV.
sstvcam.py is a point and shoot sstv camera. It uses the piface control and display (http://www.piface.org.uk/products/piface_control_and_display/) as user interface.
Put:
- python3 /home/pi/pifacecad/startup.py
- python3 /home/pi/pisstv/sstvcam.py &
At the end of your /etc/rc.local to start this software automatically at power up.
All of the code contained here is licensed by the GNU General Public License v3.
Credits to KI4MCW (sstv), Oliver Mattos and Oskar Weigl (pifm).