Firmware for DMR transceivers using the STM32F405VGT MCU, AT1846S RF chip and HR-C6000 DMR chipset.
Including the Radioddiy TYT MD-380UV / Retevis RT-3S and Baofeng DM-1701 / Retevis RT-84
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 support some core functionality that the official firmware supports, including sending and receiving of text / SMS messages
The firmware source code does not contain a AMBE codec required for DMR operation.
This functionality is provided by the official firmware which is merged with the OpenGD77 by the OpenGD77CPS or firmware loader
See https://github.com/LibreDMR/OpenGD77_UserGuide
Originally conceived by Kai DG4KLU.
Further development by Roger VK3KYY, latterly assisted by Daniel F1RMB, Alex DL4LEX, Colin G4EML and others.
Current lead developer and source code gatekeeper is Roger VK3KYY
The firmware is copyright of the OpenGD77 developers. See individual source files for copyright information.
See license files in sub-folders
Copyright (C) 2020 Amazon.com, Inc. or its affiliates.
All Rights Reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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Use of this source code or binary releases for commercial purposes is strictly forbidden. This includes, without limitation, incorporation in a commercial product or incorporation into a product or project which allows commercial use.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
Thanks to those who have assisted the project including :
BD4VOW CT1HSN CT4TX DG3GSP DG4KLU DJ0HF DL4LEX EA3BIL EA3IGM EA5SW EB3AM EW1ADG F1CXG F1RMB G4ELM IK0NWG IU4LEG IZ2EIB JE4SMQ JG1UAA OH1E OK2HAD ON1HK ON7LDS OZ1MAX PU4RON SQ6SFO SQ7PTE TA5AYX VK3KYY VK4JWT VK7JS VK7ZCR VK7ZJA ZL1XE