Configuration File Location
The systemd configuration files for AMBEserver are located in /etc/opendv
If your device is at a different location, e.g. /dev/ttyUSB1 simply copy the similar file and give it a new name with the new device
sudo cp ambeserver-ttyUSB0.conf ambeserver-ttyUSB1.conf
Modifying the Configuration File
Use an editor like vi or nano to edit your configuration file
sudo vi /etc/opendv/ambeserver-ttyUSB0.conf
There are two environment variables that may be modified namely UDP_PORT and AMBESERVER_FLAGS
Here are the contents of the configuration file:
# Configuration file for the AMBEserver program started by systemd.
# Adding flags to AMBESERVER_FLAGS will pass this to the daemon.
# For example, to change the speed to 460800, use the following line:
# AMBESERVER_FLAGS="-s 460800"
For example, on the newer ThumbDV™ (Rev. A) you would modify the AMBESERVER_FLAGS variable
To have AMBEserver listen on another UDP port, which is useful if you have more than one AMBEserver running on a single Raspberry Pi -- each with its own AMBE device.
Managing the AMBEserver
The commands for checking, starting, stopping, enabling, and disabling the AMBEserver are as follows:
sudo systemctl status ambeserver@ttyUSB0.service
sudo systemctl start ambeserver@ttyUSB0.service
sudo systemctl stop ambeserver@ttyUSB0.service
sudo systemctl enable ambeserver@ttyUSB0.service
sudo systemctl disable ambeserver@ttyUSB0.service
Modify the tty service name as appropriate by replacing ttyUSB0 with:
- ttyAMA0 for a PiDV™ on on Raspberry Pi / Raspberry Pi 2
- ttyS0 for a PiDV™ on the Raspberry Pi 3
- ttyUSBx where x is a digit for the ThumbDV™ on all Linux based systems
Enabling the service will allow the AMBEserver to automatically restart when the Raspberry Pi is restarted.
Testing the AMBEserver
Login to https://nw-digital-radio.groups.io/g/ambe and download ambesocketest.py from the file section.
Execute the script
If the script returns (repeatedly):
Server reply : a
You have an operating AMBEserver. Use control-C to escape/kill the test.
DummyRepeater for Windows or Linux
Under Compass Linux DummyRepeater can be installed with
sudo apt-get install dummyrepeater
Use address 127.0.0.1 if DummyRepeater is running on the same computer, or the IP address of the computer where AMBEserver is running.
Buster for MacOS
Use address 127.0.0.1 if Buster is running on the same computer, or the IP address of the computer where AMBEserver is running.
Over the Internet
See blog post at NW Digital Radio
Quick Build on Linux
These files are also in the files section.
If you cannot find an AMBEserver package for your architecture and distribution. Try this:
gcc -o AMBEserver AMBEserver.c
Place the executable in an appropriate place, and create configuration and autostart files. On Raspbian/Debian this would be
sudo cp AMBEserver /usr/sbin
If using the files from ambesupport.tgz (below) /usr/sbin is expected.
A set of files for systemd management are located in the files section: ambesupport.tgz
Download this file to the target computer's filesystem and run
# these files expect that an opendv user exists
sudo useradd -s /bin/false opendv && sudo usermod -G dialout opendv
mv ambesupport.tgz /tmp && cd / && sudo tar -xzvf /tmp/ambesupport.tgz
Use the above instructions
to manage the server.