rpiFSK is an RTTY modulator that runs on the Raspberry Pi platform, with its
roots derived from Andy K0SM's TinyFSK for the Arduino platform. rpiFSK's
release coincides with G3YYD's 2Tone v15.3a update that supports TinyFSK.
From the cover page of the manual:
"""""
rpiFSK provides an inexpensive RTTY modulator solution for solving
transmission problems associated with poorly adjusted AFSK RTTY
transmissions, badly timed FSK RTTY transmissions, and
underpowered/overburdened logging computers.
Key Features
Standard Raspberry Pi single-board computer running the Raspbian operating
system
Automated, “headless” operation without monitor, keyboard, mouse or
network connection
RTTY Frequency Shift Keying (FSK) output
Precise timing of Baudot transmit sequences
Baud rates of 45.45, 50, 75, and 100
Support for SO1V and SO2V operation
Dynamic Emulation of TinyFSK software and KAM/KAMplus TNC
Tested with N1MM+, MMTTY, DXLabs WinWarbler, 2Tone
Should work with anything that talks to 2Tone or KAM/KAMplus TNCs
Source code available by request: C++ (11) with standard bcm2835 and
wiringPi libraries
Free
"""""
If you are interested, the documentation (pdf) and executable are located
here:
http://www.k8ut.com/tiki-list_file_gallery.php
This would be a moderately serious DIY project. I've tried to include
only-enough Linux instruction for successful setup and installation on the
Raspberry Pi, and sufficient hardware information for building an RPi -to-
Rig interface. The software is free, but you will need a variety of hardware
that - depending on how much you homebrew - will cost between $60 and $160.
Note that rpiFSK is only a modulator (Tx). You will continue to use MMTTY,
2Tone, WinWarbler (or whatever...) for RTTY demodulation (Rx).
Corrections, feedback, advice are welcome.
-larry (K8UT)
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