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Here is a simple way to Unipager-Audio transmit your callsign announcement, as required by law in many countries.

First, create a .wav file with the desired announcement. It can be CW or speech, on your choice:

• To create a CW .wav file visit: http://www.meridianoutpost.com/resources/etools/calculators/calculator-morse-code.php
• To create a voice .wav (in 17 different languages) visit: https://ttsmp3.com/
• Convert the .mp3 to .wav (if needed) visit: https://online-audio-converter.com/
• Rename your .wav file to „callsign.wav“

Once you have the wav file, login to Unipager OS host over SSH terminal (eg. Putty) and type the following commands:

sudo -i
mkdir /unipager
chmod 777 /unipager
cd /unipager
touch callsign.sh
nano callsign.sh

The nano editor will be openend, so paste the following content:

#!/bin/bash
# CALLSIGN SCRIPT
sleep 30
service unipager stop
sleep 5
echo 1 > /sys/class/gpio/gpio1/value
sleep 1
aplay /unipager/callsign.wav -D plughw:1
echo 0 > /sys/class/gpio/gpio1/value
service unipager restart

Press Ctrl-X, then press Y to save the content.

IMPORTANT: The „-D plughw:1“ parameter is meant to systems using external USB soundcard. If using Raspberry native soundcard this parameter can be suppressed. IMPORTANT: this script opens GPIO1 to act the PTT. Use the same GPIO declared on Unipager-Audio configuration.

Still on terminal type „crontab -e“ to open the scheduler configuration, then add the following line to the end of file:

• /10 * * * * sudo /unipager/callsign.sh

Press Ctrl-X, then press Y to save the content.

Now find a way to transfer the callsign.wav file from your computer to the /unipager folder on unipager host, the easiest way is using WinScp software (or use wget, ftp, etc)

Type the command

chmod 777 *

Type the command

reboot now

Beware that this solution only waits for 30 seconds to empty the UniPager queue. On cases with high traffic and/or only few available time slots this may lead to loss of messages!

Manual by Renato PU2UTR