<div dir="ltr">Here is some additional information regarding these modules DRA-818. There is a command called: AT+DMOCONNECT. Per the programming manual:<div><br></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div><div>Handshake Command</div></div><div><div>Description: It is used to check if the module works normally. DRA818U module will send</div></div><div><div>back response information when it receives this command from the host. If the host doesn’t</div></div><div><div>receive any response from module after three times of continuously sending this command, it</div></div><div><div>will restart the module.</div></div><div><div>Format: AT+DMOCONNECT <CR><LF></div></div><div><div>Module response: +DMOCONNECT: 0 <CR><LF></div></div></blockquote><div><br></div><div>One thing is that the document does not indicate is that the settings will be reset. This command is useful for checking the module, but the other commands will need to be resent the the module since this will loose all the module settings. When I initially started play with these modules, because I used the AT+DMOCONNECT command, I thought that the settings would not be saved. Once the module is programmed, power can be removed and the settings will be remembered.</div><div><br></div><div>I have a simple Python program that sends down the programming commands and then you can enter additional commands. I am working on improving it as it's very basic.</div><div>Let me know if you are interested in this program. It does require a FDDI USB/Serial usb device. I am using this one:</div><div><br></div><blockquote style="margin:0px 0px 0px 40px;border:none;padding:0px"><div><a href="https://www.sparkfun.com/products/9873">https://www.sparkfun.com/products/9873</a></div></blockquote><div><br></div>Here are other vendors out there, such as Adafruit (<a href="http://www.adafruit.com/product/954">http://www.adafruit.com/product/954</a>), that have similar items.<br><div><br></div><div><br></div><div><br></div><div>73,</div><div><br></div><div>Chris, w0anm</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 28, 2014 at 6:40 PM, Christopher Kovacs <span dir="ltr"><<a href="mailto:w0anm73@gmail.com" target="_blank">w0anm73@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Greg, <div><br></div><div>I soldered resistor leads to the module. You can then bend the leads slightly to allow the module to be mounted on a standard proto-boards. Be careful the amount of heat that you use as you can damage them.</div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div><a href="https://www.dropbox.com/s/zmyzm6absmz7w67/IMG_20141128_181825.jpg?dl=0" target="_blank">https://www.dropbox.com/s/zmyzm6absmz7w67/IMG_20141128_181825.jpg?dl=0</a></div><div><a href="https://www.dropbox.com/s/n3d4uitmtk0l8mp/IMG_20141128_183736.jpg?dl=0" target="_blank">https://www.dropbox.com/s/n3d4uitmtk0l8mp/IMG_20141128_183736.jpg?dl=0</a></div></blockquote><div><br></div><div>I am working on a program to setup the frequencies, volume and filtering from a usb/serial device. I have also discovered that these modules will save there frequency/setup information, so once it's programmed, it will remember the settings when powered up. I originally thought that this was not the case with the DRA818u modules.</div><div><br></div><div><br></div><div>73,</div><div><br></div><div>Chris, w0anm</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 28, 2014 at 11:31 AM, Greg Thornwall <span dir="ltr"><<a href="mailto:thorn@myactv.net" target="_blank">thorn@myactv.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
<br>
I ordered and recived a couple from the ebay seller last week. How does one solder leads to them? Directly? Or is there some sort of "socket" that would make it easier to use?<br>
<br>
I see this guy sells them mounted on a PCB which would make it easier to setup:<br>
<br>
<a href="http://hamshop.cz/uvodni-stranka/rf-modules-c36/modul-vhf-transceiveru-134174mhz-1w-dra818v-i266/" target="_blank">http://hamshop.cz/uvodni-<u></u>stranka/rf-modules-c36/modul-<u></u>vhf-transceiveru-134174mhz-1w-<u></u>dra818v-i266/</a><br>
<br>
<br>
73 Greg KD3SU<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 11/26/2014 12:00 PM, <a href="mailto:arm-allstar-request@hamvoip.org" target="_blank">arm-allstar-request@hamvoip.<u></u>org</a> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
------------------------------<u></u>------------------------------<u></u>----------<br>
<br>
Message: 1<br>
Date: Tue, 25 Nov 2014 13:18:15 -0600<br>
From: "ssedgwick" <<a href="mailto:ssedgwick@suddenlink.net" target="_blank">ssedgwick@suddenlink.net</a>><br>
To: <<a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a>><br>
Subject: [arm-allstar] DRA818V VHF Band Voice Transceiver Module and<br>
DRA818U UHF Band Voice Transceiver Module<br>
Message-ID: <<u></u>17B4A116D1BF4008B216477031F326<u></u>22@SteveOfficePC><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
I saw these VHF and UHF voice transceivers modules talked about on another VOIP Yahoo group a couple weeks ago. After looking at the specs, I see they are based on the RFIC RDA1846 transceiver IC chip. Looks like a way to make a nice portable hot spot when tied to the BBB and the fine work Doug and others have done with Allstar. I?m not a programmer, but I wonder if it would be possible to interface these modules to a BBB and be able to program the RF freuqency, PL, DPL, etc using touchtone commands, or if that?s not possible to program via ssh?<br>
<br>
Here?s a couple links to DRA818 modules and also ebay listings for both the VHF and UHF models.<br>
<br>
<a href="http://www.dorji.com/docs/data/DRA818U.pdf" target="_blank">http://www.dorji.com/docs/<u></u>data/DRA818U.pdf</a><br>
<br>
<a href="http://dorji.com/docs/data/DRA818V.pdf" target="_blank">http://dorji.com/docs/data/<u></u>DRA818V.pdf</a><br>
<br>
<a href="http://dorji.com/docs/app/ADW1003_DRA808M.pdf" target="_blank">http://dorji.com/docs/app/<u></u>ADW1003_DRA808M.pdf</a><br>
<br>
<a href="http://dorji.com/docs/app/ADW1011_configure_DRA818V_DRA818U_through_computer.pdf" target="_blank">http://dorji.com/docs/app/<u></u>ADW1011_configure_DRA818V_<u></u>DRA818U_through_computer.pdf</a><br>
<br>
<a href="http://dorji.com/docs/app/ADW1004_DRA808M.pdf" target="_blank">http://dorji.com/docs/app/<u></u>ADW1004_DRA808M.pdf</a><br>
<br>
<a href="http://www.ebay.com/itm/191243649892" target="_blank">http://www.ebay.com/itm/<u></u>191243649892</a><br>
<br>
<a href="http://www.ebay.com/itm/191210888951" target="_blank">http://www.ebay.com/itm/<u></u>191210888951</a><br>
<br>
73,<br>
Steve_WB8GRS<br>
<br>
</blockquote>
<br>
______________________________<u></u>_________________<br>
<br>
arm-allstar mailing list<br>
<a href="mailto:arm-allstar@hamvoip.org" target="_blank">arm-allstar@hamvoip.org</a><br>
<a href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar" target="_blank">http://lists.hamvoip.org/cgi-<u></u>bin/mailman/listinfo/arm-<u></u>allstar</a><br>
<br>
Visit the BBB web page - <a href="http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/" target="_blank">http://www.crompton.com/<u></u>hamradio/<u></u>BeagleBoneBlackAllstar/</a><br>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>