OpenLST is an open source radio solution for communicating with remote instruments, vehicles, and stations using low-cost commercial components. It builds on experience gained from Planet's UHF satellite radio.
The project includes basic hardware schematics, a bootloader, radio firmware, and basic computer interfacing software. Hardware is released under CC-BY-SA 4.0; code is released under GPLv3.
The project does not have an HTTP landing page other than the blog post, but can be cloned via git:
git clone --recursive https://www.planet.com/open/openlst.git
git clone --recursive https://www.planet.com/open/openlst-hw.git
Boards have been uploaded to OSHPark for people wanting to use the example project design: