OpenGD77

Okay, that happens when you're trying to download the donor firmware, right ? If it's the case, thanks to SA0BUX, you can download the file from another source (see https://opengd77.com/viewtopic.php?f=19&t=2380&start=190#p23584 ) Cheers. --- Daniel No. When I write something here to in this topic,...

Just tested again.
Copy - paste the long answer to this topic.
After Submit , following screen comes up.

I did your instructions. The original TYT firmware only for changing my radio to your suggested firmware by TYT original firmwaredownload (I have download from your links). Finally on OpenGD77 CPS when I try to upload the OpenGd77 firmware to the radio, Same error appers... " Unable to Initialise th...

I did not understand, I changed my laptop location to USA. I am using original TYT USB dongel. I have replaced all drivers and installed the one which notified in the first page of this topic. Now my device shown as "STM Device in DFU Mode" . The TYT CPS program works with it. If the STM Device was ...

F1RMB wrote: ↑

Sun May 21, 2023 6:14 pm

Have you tried the driver, available in the first post in this thread ?

Yesterday tried. 5 minutes before again tested.
Same error.

Today I read some posts in the forum.
I think I have same problem which one Turkish friend had 2 years before.

SA0BUX wrote: ↑

Sun May 21, 2023 4:02 pm

Start using Opengd77 firmware instead, you have full control of frequency ranges as long as it's inside the range supported by hardware.

I wish.
Still got STM DFU problems.
Hope will solve it with your helps.

I live in Istanbul. Male. Electronic & Communicating Engineer. I like to communicate like in the old days. So DMR does not for me :) I am a HF band listener for long years. I like to travel by motorcycle. Airsports is my hobby. Also I am one of the referee in the Turkish Air Sports Federation. There...

What appears in the windows device manager when you activate DFU mode? I'm not at home now but I will show what I see in my device manager later tonight. Device shown as; Under "Universal serial bus controllers" Named "STM Device in DFU Mode" Driver details are; Vendor : STMicroelectronics Date : 2...

F1RMB wrote: ↑

Sun May 21, 2023 3:09 pm

Don't forget to post there.

Stupid question, did you put your transceiver in bootloader mode (SK1 + PTT + Power on) ?

Cheers.
---
Daniel

I did it million times. Affraid my buttons going to be die

My UV390 GPS works (400-480 , 136 - 174) I read many posts on internet about unlock the hidden frequencies. (I dont why :) ) but I unlock the unit by pressing side buttons. Then my radio turn to USA version freauency range. It was not possible to send or recive anything under 450 Mhz. I have upgrade...