Firmware for the Radioddity GD-77 (aka TYT MD-760), GD-77S, Baofeng DM-1801 (aka DM-860) and Baofeng RD-5R (DM-5R mk2), dual band DMR / FM handheld transceivers, for Amateur Radio use.

Due to problems with the software license, it is no longer possible to create and distribute the binaries of the firmware. This is because the software license requires that source code for the released project must be available. However this is impossible because approximiately 30% of the firmware file comes from the closed source official firmware.

The firmware is relatively stable and provides DMR and FM audio transmission and reception, as well as a DMR hotspot mode. However it does not currently support some core functionality that the official firmware supports. Not all functionality provided in the official firmware is likely ever to be part of this firmware, because some features like encryption are explicitly prohibited for Amateur Radio operators.

There is an extensive User Guide https://github.com/rogerclarkmelbourne/OpenGD77/blob/master/docs/OpenGD77_User_Guide.md however because the firmware is evolving very rapidly, sometimes the User Guide does show the latest features or functions.

Originally conceived by Kai DG4KLU. Further development by Roger VK3KYY, latterly assisted by Daniel F1RMB, Alex DL4LEX, Colin G4EML and many others.

Amateur Radio and educational , Non commerial use only.

Use of this software for commercial purposes is strictly forbidden.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.