OpenGD-77 for the Baofeng DM-1801

VK3KYY
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OpenGD-77 for the Baofeng DM-1801

Post by VK3KYY » Fri Mar 06, 2020 10:34 am

I have now released a version of the OpenGD77 which works on the Baofeng DM-1801

As with the OpenGD77, I will just be releasing the "Latest" version, which is not guaranteed to be stable, but is in use by 3 people at the moment with no major issues.

https://github.com/rogerclarkmelbourne/ ... latest.sgl

When and if this version proves to be stable, I'll make a copy this and release it as the Stable version.

I don't know if the DM-1801 codeplug is the same format as the GD-77 codeplug, probably not, so anyone who wants to try this will need to upload a new codeplug using the OpenGD77 CPS, as the DM-1801 will use the GD-77 codeplug format.

https://github.com/rogerclarkmelbourne/ ... taller.exe


As well as the official codeplug being different on the DM-1801 to the GD-77, the calibration data is in a different location , so both on the DM-1801 and the GD-77 I have modified the firmware to copy the calibration data to the same location in both radios (0x0000F000)

And the new version of the CPS uses the calibration table in this new location.
Note. The calibration data still remains in the original location on both radios, so its still possible to reload the official firmware on both radios.


youtu.be/tiCOV1zYfig

Update

kd2lh has tested Hotspot mode and it seems to work. However there may be a small problem with CWID modulation level

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m1dyp
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Re: OpenGD-77 for the Baofeng DM-1801

Post by m1dyp » Fri Mar 06, 2020 11:28 am

looking good
73 de Ken :D

IW6CNM
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Re: OpenGD-77 for the Baofeng DM-1801

Post by IW6CNM » Fri Mar 06, 2020 8:08 pm

is it hotspot function included?
anyway thanks for the great job :)

VK3KYY
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Re: OpenGD-77 for the Baofeng DM-1801

Post by VK3KYY » Fri Mar 06, 2020 8:12 pm

IW6CNM wrote:
Fri Mar 06, 2020 8:08 pm
is it hotspot function included?
anyway thanks for the great job :)
Yes. But it’s not been tested by anyone.

The firmware is identical, apart from the operation of the extra buttons on the keypad.

ka8clx
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Re: OpenGD-77 for the Baofeng DM-1801

Post by ka8clx » Sat Mar 07, 2020 5:40 am

Hi Roger, wonderful to see that you got this code working on the DM-1801. I have one of those and the GD-77, both using OpenGD-77. I have tried it on my Zumspot Simplex hotspot and it works just fine. I did DMR simplex between the two radios and found the GD-77 transmit audio to be very clear with no background noise while the DM-1801 had some background noise, although not enough to be an issue.

I'd be happy to help test things. Thanks again!

VK3KYY
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Re: OpenGD-77 for the Baofeng DM-1801

Post by VK3KYY » Sat Mar 07, 2020 5:45 am

ka8clx wrote:
Sat Mar 07, 2020 5:40 am
Hi Roger, wonderful to see that you got this code working on the DM-1801. I have one of those and the GD-77, both using OpenGD-77. I have tried it on my Zumspot Simplex hotspot and it works just fine. I did DMR simplex between the two radios and found the GD-77 transmit audio to be very clear with no background noise while the DM-1801 had some background noise, although not enough to be an issue.

I'd be happy to help test things. Thanks again!
OK.

Thanks for the report.
I think the electronic / RF design of the DM-1801 is not as good as the GD-77, hence the increased noise on Tx and also on Rx.

I've not had time to try getting my DM-1801 to work with my hotspot, as I've been fixing the power levels on the DM-1801, and doing a load of other stuff.


Can you backup your calibration from the DM-1801 and zip it an attach it here, so I can try it in my radio, to see if I can get it to work with my hotspot

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m1dyp
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Re: OpenGD-77 for the Baofeng DM-1801

Post by m1dyp » Sat Mar 07, 2020 2:34 pm

73 de Ken :D

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kd2lh
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Re: OpenGD-77 for the Baofeng DM-1801

Post by kd2lh » Sat Mar 07, 2020 2:44 pm

Does the firmware load function in the new version of OpenGD77 CPS work with the DM-1801, or is a Baofeng DM-1801 specific upload tool needed?

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F1RMB
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Re: OpenGD-77 for the Baofeng DM-1801

Post by F1RMB » Sat Mar 07, 2020 3:15 pm

Hi Marc,
kd2lh wrote:
Sat Mar 07, 2020 2:44 pm
Does the firmware load function in the new version of OpenGD77 CPS work with the DM-1801, or is a Baofeng DM-1801 specific upload tool needed?
AFAIK the firmware uploader included in the CPS isn't ready to flash DM-1801 yet. You can use the binary version from the firmware source:
https://github.com/rogerclarkmelbourne/ ... Loader.exe

passing 'DM-1801' command line argument, or the python version:

https://github.com/rogerclarkmelbourne/ ... _loader.py


Cheers.
---
Daniel
73 de Daniel.

ka8clx
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Re: OpenGD-77 for the Baofeng DM-1801

Post by ka8clx » Sat Mar 07, 2020 7:50 pm

dm-1801-calibration.bin.zip
Here is the calibration from my DM-1801
(408 Bytes) Downloaded 25 times
VK3KYY wrote:
Sat Mar 07, 2020 5:45 am
ka8clx wrote:
Sat Mar 07, 2020 5:40 am
Hi Roger, wonderful to see that you got this code working on the DM-1801. I have one of those and the GD-77, both using OpenGD-77. I have tried it on my Zumspot Simplex hotspot and it works just fine. I did DMR simplex between the two radios and found the GD-77 transmit audio to be very clear with no background noise while the DM-1801 had some background noise, although not enough to be an issue.

I'd be happy to help test things. Thanks again!
OK.

Thanks for the report.
I think the electronic / RF design of the DM-1801 is not as good as the GD-77, hence the increased noise on Tx and also on Rx.

I've not had time to try getting my DM-1801 to work with my hotspot, as I've been fixing the power levels on the DM-1801, and doing a load of other stuff.


Can you backup your calibration from the DM-1801 and zip it an attach it here, so I can try it in my radio, to see if I can get it to work with my hotspot

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