title: TYT MD-UV380/390 / RT-3S / DM1701 Installation information - OpenGD77
source: https://www.opengd77.com/viewtopic.php?f=19&t=2380
author:
- "[[Post\t\t\t\t\t\t\t\t\t\t\t\t\tby VK3KYY » Sat Sep 17]]"
- "[[2022 12:43 am]]"
- "[[2022 3:39 am]]"
- "[[2022 4:23 am]]"
- "[[2022 4:54 am]]"
- "[[2022 7:53 am]]"
- "[[Post\t\t\t\t\t\t\t\t\t\t\t\t\tby IZ2EIB » Sat Sep 17]]"
- "[[2022 10:48 am]]"
- "[[2022 11:01 am]]"
- "[[Post\t\t\t\t\t\t\t\t\t\t\t\t\tby SA0BUX » Sat Sep 17]]"
published:
created: 2025-05-30
description:
tags:
- BeofangPosts:
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia
Firmware installation instructions
Thanks mainly to Colin G3EML we now have an version which works on the TYT MD-UV380/390 and the Retevis RT-3S and DM-1701
Thanks also to Daniel F1RMB for his work on this, as well as the testers
The firmware does not support the normal MD-UV380 / RT-3S codeplug.
If you have a GD-77 or DM-1801 etc, running OpenGD77 then use that codeplug.
Otherwise, you should create a new codeplug from scratch.
Optional
If you are not sure whether you definitely want to use OpenGD77 in the long term...
Before installing the firmware, you should be sure you have a copy of the official firmware which works with your radio, in case you need to reinstall the official firmware.
User Interface
The radio does not have all the buttons on the GD77. Specifically the Right and Left buttons on the keypad, but the radio has a rotary control.
On the VFO and Channel screen, the Up and Down functions are now handled by the rotary controls, and the Up/Down buttons have been remapped to Left / Right
In the menu’s however, the Up and Down buttons move up and down the menu list, and the rotary control is used to increase or decrease settings values.
This is Alpha / Experimental firmware, and does not have all OpenGD77 functionality, and also probably has some bugs
One other thing I need to say about this radio.
It has a hardware design problem with the audio.
The volume control is not a pot in series with the audio amp. The volume control feeds a voltage signal into the CPU, and the CPU has to adjust the audio gain of the C6000 chip for both FM and DMR audio
This means the audio control available on this radio is not as good as other radios.
The minimum audio gain setting of the C6000 chip, is not as low as the volume control if the analog audio signal passed through a pot.
In the furture it may be possible to slightly improve the lowest audio level, but at the moment the lowest audio level is not as low as on the GD77 etc
Removal of the firmware
If you need to remove the firmware, you can reload the official firmware for your radio, using the official firmware loader application, however before reinstalling the official firmware you should restore your Flash backup using the OpenGD77, as this will restore your original codeplug.
If restoring the Flash does not work you may need to change the setting.ini file of the official cps to allow your old codeplug to be uploaded as the radio probably now requires a passcode before it can be used.
In settings.ini, Change
password=0 to password=password
Posts:
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia
Sat Sep 17, 2022 3:34 am
I happened to be popping by and found this! Wow!
I am testing now, on my RT3s w/ GPSr. This will be my third OpenGD77 FW device, after GD-77 (own 2, one has a non working display) and RD-5R.
Thanks so much to Rogers and the development team for this! I feel I owe you all some beer and goodies!
OK. Let me know how you get on.
Not sure if the GPS is working, becuase the GPS in my RT-3S doesn't seem to work all the time even with the official Retevis firmware.
Posts:
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia
OK.
I'll try to test the flash backup again, but the problem is that it takes a long time, and if it gets a USB glitch it could hang the CPS
Its best to backup the flash if possible, As it makes it much easier to revert to the official firmware
Posts:
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia
Hi guys.
Many thanks to the developers and testers, it is a really very interesting news.
I am sorry for the dumb question, but not having that kind of radio I am not very informed and I would like to be as precise as possible with a OM friend of mine who owns it.
Could this experimental firmware also be used with an old Retevis RT3 only UHF and DMR (the very first version of RT3 that has the 70 cm band only and only works in digital DMR, not in analog FM and it does not even have the FM broadcasting band 88 - 108 MHz)?
Thanks!
73 best regards de Fabio IZ2EIB
Posts:
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia
Sat Sep 17, 2022 10:48 am
Could this experimental firmware also be used with an old Retevis RT3 only UHF and DMR (the very first version of RT3 that has the 70 cm band only and only works in digital DMR, not in analog FM and it does not even have the FM broadcasting band 88 - 108 MHz)?
It only works on the RT-3S / MD-UV380
The RT-3, is different hardware.
Posts:
Joined: Tue Jul 05, 2022 8:50 am
Location: JO99ah, Stockholm, Sweden
Contact:
Sat Sep 17, 2022 11:17 am
Very nice, ordered a RT-3S from Retevis, hope that they doesn't changed the hardware.
The OpenGD77 software gives a new dimension to the radios.
My RT3S is about 2 years old, but I don't think the hardware has changed.
I think TYT / Retevis, can continue to make these radios, because the supply shortage that stopped the GD77 is the CPU, and the RT-3S / UV380 uses a different CPU which is currently available.
TYT also continues to make the MD-9600 / Retevis RT-90, and this uses the same CPU as the RT-3S / UV380
Posts:
Joined: Sat Nov 16, 2019 9:15 am
Hello all, how to put the RT3S in Scan???? (what keys) thanks 73
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