MMDVMAudio

I am working on a new application to decode DMR audio on a hotspot and pipe it out the 3.5mm jack on the raspberry pi.

Here is a video of my progress.  

AllstarLink Dynamic DNS (DDNS)

AllstarLink internally support Dynamic DDNS.  If you have a node that does not have a static IP address, you can use their internal DDNS system to remotely access your node.

Each node registers with AllstarLink's internal registration system.  It periodically reregisters so that the AllstarLink system knows your node's IP address.  Your node number and IP address is automatically downloaded by other nodes throughout the day.  This is how other nodes know how to connect to your node.

Because of this built-in capability, Allstar link can and does provide a DDNS service.  You can access your node using xxxxx.nodes.allstarlink.org or xxxxx.remotebase.nodes.allstarlink.org.  

This URL will allow you to easily access your node using SSH or view Allmon2, provided that you have open the ports for SSH or HTTP.  There is no need to setup your own domain name through a third-party DDNS provider.

Note:  My node was setup as a remote base, so I had to use xxxxx.remotebase.nodes.allstarlink.org

You will find the documentation on their DNS system at https://wiki.allstarlink.org/wiki/DNS_Servers.

Hamshack Hotline RF setup

 I recently setup Hamshack Hotline to link to our 145.33 Allstar node.  I ran into a problem with the Allstar node rejecting the connection because of authentication.

Note:  If you run into a problem with the connection, run 'asterisk -rvvv' from the command line.  You will see messages should the inbound connection fail.  

I found this information useful - Asterisk IAX authentication

The instructions from Hamshack Hotline tell you to modify your iax.conf as follows:

[hhphone]
username= HH12345
type=user
context=hhphone
host=dynamic
auth=md5
secret=12345678901234567890
disallow=all
allow=ulaw
allow=g726aal2
allow=gsm
codecpriority=host
transfer=no
callerid=”HamshackHotline”

In my case, authenication failed because the stanza [hhphone] needed to match the value in username.  In this example case the username was HH12345.  I changed [hhphone] to be [HH12345].

[HH12345]
username= HH12345
type=user
context=hhphone
host=dynamic
auth=md5
secret=12345678901234567890
disallow=all
allow=ulaw
allow=g726aal2
allow=gsm
codecpriority=host
transfer=no
callerid=”HamshackHotline”

This solved the authentication problem.

Hamshack Hotline setup for FreePbx

Here is the setup for Hamshack Hotline using FreePbx.  I am assuming that you already have FreePbx setup with a connected phone.

Click on Connectivity and select Trunks.

Click the Add Trunk option.  In the drop down select Add IAX2 Trunk.

In Trunk Name enter Hamshack#### where #### is your assigned telephone number.

In Outbound Caller Id enter <#####> where ##### is your assigned telephone number.  Your screen should look like the following.

Click the iax Settings tab.

In Trunk Name enter Hamshack#### where #### is your assigned telephone number.

In the Peer Details enter the following.  Replace ##### with your assigned telephone number.  Replace xxxxxxx with your assigned secret.

host=hhus.wizworks.net

username=##### 

secret=xxxxxxxxxxxxxxxxxxxxxxxx

type=peer

qualify=yes

Your screen should look like the following.

Click the Incoming tab.

Enter your assigned telephone number in the Context field.

Enter the following in the user details.

type=user

context=from-trunk

Enter your register string as ######:xxxxxxx@hhus.wizworks.net:4569 
Replace ##### with your extension number and xxxxx with your assigned secret.  This secret is the same on the outgoing and incoming tabs.

Your screen should look like the following.

Click the Submit button.

Next you need to setup an inbound route.  Click on Connectivity then Inbound Routes.

Click add inbound route.

Enter your assigned extension number in the Description and DID fields.  In the Set Destinations box, select Extensions.  In the next drop down, select the extension that you want to receive the Hamshack Hotline calls.  Note:  You can use a ring group.

Your screen should look like the following.

.

Click the Submit button.

Now create an Outbound route.  Click on Connectivity then Outbound Routes.

Click Add Outbound Route.

Enter Hamshack##### in the Route Name.  Enter your assigned extension in the Route CID.  Select HamShack##### in the Trunk Sequence for Matched Routes.

Your screen should look like the following.

Click on the Dial Patterns tab.

Set the prefix to 7 (you can use any single digit).  Enter X. for the match pattern.

Note:  Since I have voip service with voip.ms, I am using 7 as a prefix to dial into the Hamshack Hotline server.  There are other matching options.

Your screen should look like the following.

Click the Submit Button.  Then click Apply Config at the top.

This should have you up and running on Hamshack Hotline.  I added this because I struggled to find all of the setup information in one place.  

73

AllStarLink Node 53431 / DMR Bridge 31018

 I have completed my AllStarLink setup to bridge the 145.33 repeater over to DMR talk group 31018.

I am using RasLink for the control software.   This software controls the GM300 which is set to 145.33.  Control is through a DMK URIX.   I also use the Repeater Builder USB-RIM-Lite.  The USB-RIM-Lite does have the ability to detect a stuck PTT.

The software allows users to link over to DMR talk group 31018 using analog_bridge from DVSwitch. You will find useful information on the DVSwitch forum.  I am using a ThumbDV for the AMBE voice conversion.  You can also use the DVstick 30.

I added a 12 volt to 5 volt converter to power the Raspberry PI.

This is a neat installation and the performance is good.

I have to thank the many amateurs that contributed open source code to make this type of project possible.