Overview

The DigiPi project can be seen at http://craiger.org/digipi/ In this repository are modified files or additional files to the project. Clone the repository with command https://github.com/w4mhi/digipi.git, then cd digipi to get access to the files.

DigiBanner has a new look, so it needs to run at boot without being overwritten by the DigiPi TNC. The following changes needs to be made in the /etc/rc.local.

• sudo remount
• sudo nano /etc/rc.local
• look for /home/pi/digibanner.py -b DigiPi -s " v1.6" & and add 4 spaces (that will align better the version with title)
• prefix the line service tnc start with # (practically comment the line)

Release note: copy the files from digipi folder to the parent folder /home/pi. Same with the common and config folder. Veify the files digi*.py have executable rights. If they are not execuatble, use the command chmod +x direwatch.py for example.

DigiGrid

This program will show some information from the GPS including the Maidehead Grid. The assumption is the DigiPi is connected to a GPS source, like ICOM-705 with the USB OUT setup to GPS Data.

The program has dependency on the Maidenhead module.

• sudo remount to make the file system writeable.
• pip3 install maidenhead will install the module in a folder that is not in the path.
• save changes from the DigiPi

The following steps are to verify if the operator has GPS data. All commands require RasPi shell.

Check if services are working:

• systemctl is-active gpsd
• systemctl is-active chronyd

Check data with cgps -s.

If data doesn't show on the screen, restart the services with the following commands. For authentication choose 1 and use the pi account password.

• systemctl stop gpsd.socket
• systemctl stop gpsd
• systemctl start gpsd
• systemctl start gpsd.socket

Verify the data is present with cgps -s.

Run the file with the python command python3 digigrid.py.

Command line parameters: "-c", "--continous" - optional parameter used for continous running. Accepted values: True/False" "-r", "--refresh" - optional parameter used for GPS data refresh. Default is the minimum value of 3, the maximum value is 60, in seconds. "-d", "--debug" - optional parameter used to print the GPS data to the console for debugging purpose. Accepted values: True/False"

DigiWeather

This program will show some information from the weather in the desired location. The location is configured in the configuration folder. Copy the font from fonts to a permanent location with sudo cp weathericons-regular-webfont.ttf /usr/share/fonts/truetype/weather/weathericons-regular-webfont.ttf.

The weather.ini has couple of parameters that can be changed. The can be requested for free from https://openweathermap.org/api

Run the file with the python command python3 digiweather.py.

Command line parameters: "-c", "--continous" - optional parameter used for continous running. Accepted values: True/False" "-r", "--refresh" - optional parameter used for GPS data refresh. Default is the minimum value of 3, the maximum value is 60, in seconds. "-f", "--flip" - optional parameter used to refresh the screen data between the overview and detailed weather information. Default is the minimum value of 5, the maximum value is 30, in seconds. "-d", "--debug" - optional parameter used to print the GPS data to the console for debugging purpose. Accepted values: True/False"

Installation

The GPS grid can be installed in the main dashboard of the DigiPi as a service.

• copy the bash folder to the /home/pi per Release notes.
• give executable rights with sudo chmod +x weather.sh and sudo chmod +x gpsgrid.sh
• create a new service, for example gpsgrid by running sudo nano /etc/systemd/system/gpsgrid.service
• add the following lines:

[Unit]
Description=GPS and Maidenhead Grid for Pi

[Service]
ExecStartPre=+systemctl stop fldigi sstv wsjtx tnc300b digipeater tnc node js8call
ExecStart=/home/pi/gpsgrid.sh
User=pi
Restart=no

[Install]
WantedBy=multi-user.target

Note: The ExecStartPre section will stop all current services to let the current service to run.

• change the service permissions to 644 with sudo chmod 644 /etc/systemd/system/gpsgrid.service
• enable the service sudo systemctl enable gpsgrid.service
• reload the daemon for services sudo systemctl daemon-reload
• edit the index.php to add the service to the dashboard with sudo nano /var/www/html/index.php
• look for a similar section and insert the following one

if (isset($_POST["gpsgrid"])) {
    $submit = $_POST["gpsgrid"];
    if ( $submit == 'on' ) {
        $output = shell_exec('sudo systemctl start gpsgrid');
        sleep(5);
        echo $output;
    }
    if ( $submit == 'off' ) {
        $output = shell_exec('sudo systemctl stop gpsgrid');
        echo $output;
    }
}

• navigate down in the file code until the similar section is met and insert the following code:

#-- GPS GRID -------------------------------------------------
echo "<tr>";
$output = shell_exec('systemctl is-active gpsgrid');
#$output = str_replace("failed", "inactive", $output);
$output = chop($output);
if ($output == "active")
{
    echo '<td bgcolor="lightgreen">';
}
elseif ($output == "failed")
{
    echo '<td bgcolor="lightgreen">';
}
else
{
    echo '<td bgcolor="lightgrey">';
}
echo "&nbsp;";
echo "</td><td>";
echo "<font size=+1>GPS & Maidenhead Grid</font></td>";
echo '<td align="right" nowrap>';
echo '<input type="submit" name="gpsgrid" value="on"> ';
echo '<input type="submit" name="gpsgrid" value="off">';
echo "</font>";
echo "</td></tr>";

• find where the service are called for shutdown and insert the followingcode:

$output = shell_exec('sudo systemctl reset-failed gpsgrid');

• restart the DigiPi with sudo reboot to make sure the system is in the read-only mode

Documentation for debugging

• see the init_display.py module for display settings
• see https://gpsd.gitlab.io/gpsd/gpsd_json.html for json format
• see https://github.com/space-physics/maidenhead for maidenhead grid
• see for GpsPoller:

• https://github.com/timmyreilly/BumpyRoads/blob/master/RaspberryPiFiles
• https://stackoverflow.com/questions/6146131/python-gps-module-reading-latest-gps-data
• http://www.danmandle.com/blog/getting-gpsd-to-work-with-python/

• see for service under RasPi https://gist.github.com/emxsys/a507f3cad928e66f6410e7ac28e2990f
• also https://www.thedigitalpictureframe.com/ultimate-guide-systemd-autostart-scripts-raspberry-pi/

Thank you for trying the files and the original project! 73!