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Need help to send DMR short data message from PC on NX-5700

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Expat2017

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Dec 29, 2016
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I would like to be able to send DMR short group and private data messages from my PC thru a Kenwood NX-5700 mobile.
I understand there is a com port in the DB25 and that is primarily just a string of bytes, The message starts with 0x02 byte and ends with 0x03 byte.
It is the bit in the middle I don't have. I have found this - \x02 gGU 00002 helloWorld \x03 but it does not work.,

Any help guidance appreciated.
 
ramal121

ramal121

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In NXDN the way to go is to get the KAS-10 or KAS-20 program, connect to pc via rs-232, and have at it. Do those work with DMR? Don't know, never tried. Anybody?
 
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Expat2017

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ramal121 said:
In NXDN the way to go is to get the KAS-10 or KAS-20 program, connect to pc via rs-232, and have at it. Do those work with DMR? Don't know, never tried. Anybody?
Click to expand...

If I was in the market for AVL and dispatch software maybe but I will be doing my own small APP, so just need the protocol. I appreciate the reply and info.
 
kd4efm

kd4efm

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Do you have a dealer your are working with? If so, they can contact tech support for you and see if they can get you the PC commands, the other option is to join the SDK group.
 
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Expat2017

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kd4efm said:
Do you have a dealer your are working with? If so, they can contact tech support for you and see if they can get you the PC commands, the other option is to join the SDK group.
Click to expand...
No this is just a personal project and don’t have the resources to pay for the SDK. Thanks for the idea.
 
kd4efm

kd4efm

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I am being told that you can use KAS-20 to send messages in SDM mode.
But the ability to freestyle sms is hard with a dtmf mic, unless you're use to a blackberry.....
I don't believe KAS-10 has DMR in it, as that with NXDN can send short and long data messages also,.
Have to investigate that when i have a minute
 
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Expat2017

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Thanks to everyone for all the suggestions, they were interesting but unfortunately didn"t result in an answer.

Not being deterred, I decided to start with what I do know.
I know that the protocol starts with 0x02 byte (stx) and ends with 0x03 byte (etx) and well that was about it,
What else could I find out.. Maybe I could send a DMR text message to the NX-5700. I set up COM port 1 as below.

image.png

and connected my PC to it.

Sending the DMR text message "Hello World!" to the NX-5700 produced the following sequence of bytes from the COM port.

xFU00000010G00004000Hello World! (stx and etx not shown).

What can I make of that.
Well "Hello World!"is self explanatory but about the rest....
It just so happens that 00000010 is the unit ID of my portable and 00004000 is the Group Id I sent the message to.

That leaves xF U and G. Could G possible mean group, U mean Unit ID and xF is the command to send a text message.

So for Sits and Giggles, I went for it. I sent the following string to the NX-5700.

xFG00004000A Test Message! (message wrapped with stx and etx).

To my absolute surprise my portable received the text message "A Test Message!" to Group 4000 from Radio ID 40 (Unit ID of the NX-5700).

xFU00000010A Private message sent a private message to my portable.

It worked, I am a god........

I hope this is helpful to others.
 
serial14

serial14

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@Expat2017 very nice work. Thanks for the write up.

I've always been interested to try and get data out of a DMR radio. Like text messages or GPS positions. Does anybody know of other radios that expose this data on some sort of serial/usb port? I haven't dug into it my self yet, just one of many many project ideas on the list.
 
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Expat2017

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serial14 said:
@Expat2017 very nice work. Thanks for the write up.

I've always been interested to try and get data out of a DMR radio. Like text messages or GPS positions. Does anybody know of other radios that expose this data on some sort of serial/usb port? I haven't dug into it my self yet, just one of many many project ideas on the list.
Click to expand...
Oh so think most of the commercial mobiles do. I know Hytera does, but its protocol is convoluted and most likely a rip off of Motorola’s. A lot of the cheap Chinese DMR radios sold on Aliexpress so not.
 
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phillmobile

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why not just use radtext its free
af9h.morganized.com

AF9H-NET - RADtext

RADtext version 4.15.3 no longer requires a License Key for Server. Download and install version 4.15.1, then download and overwrite the files found in "RADtext-4.15.3.zip" in the program folder.
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