The encoding process is relatively light on resources, and an Arduino should be perfectly capable of running this code.
The intent of this library is to foster experimentation with e.g. automated beacons. FT8 already supports free-text messages and the upcoming new version will support raw telemetry data (71 bits).
Work is in progress (possibly taking forever) to explore decoding options. On a fast 32-bit microcontroller decoding might be possible, perhaps with some tradeoffs.
# References and credits
Thanks to Robert Morris, AB1HL, whose Python code (https://github.com/rtmrtmrtmrtm/weakmon) inspired this and helped to test various parts of the code.
This would not of course be possible without the original WSJT-X code, which is mostly written in Fortran (http://physics.princeton.edu/pulsar/K1JT/wsjtx.html). I believe that is the only 'documentation' of the FT8 protocol available, and the source code was used as such in this project.