Piping GPS data to OTDT

Certainly the GPS data could always be used as a Trigger for OTDT. But, if you only want to store the current values to have them available in a Trigger initiated Action, then you simply could do that.

// The following code should be cone via the `_init_` of the `_module_` section
// 
// Using the `vars` state to GPS data. Initialize it.
// 
vars.gps = {
    run: 0,
    fixed: 0
};
// Now `spawn` `gpspipe` and attach it to `readline`
// 
var p = app.spawn("gpspipe -w");
var r = app.readline(p);
// Some error handline on the pipe
// 
p.stderr.on('data', (data) => {
    console.error("Error", data.toString());
});
// Getting to know when pipe is closed
// 
p.on('close', (code) => {
    console.info("Closed", code);
    r.close();
    vars.gps = {                                                       
        run: 0,                                                        
        fixed: 0                                                       
    };                                                                 
});
// Getting GPS data
// 
r.on('line', async (line) => {
    console.log("Data", line);
    // Getting GPS data
    let data = JSON.parse(line);
    // Only consider `TPV` records
    if (data.class != 'TPV')
        return;
    // If GPS data is valid, store it to the `vars` state
    if ('lat' in data && data.lat != 0 && 'lon' in data && data.lon != 0) {
        vars.gps = data;
        vars.gps.run = 1;
        vars.gps.fixed = 0;
        if ('mode' in data && data.mode > 1)
            vars.gps.fixed = 1;
    }
});

With this code snippet you store incoming GPS data for usage in any Action on any participating OTDT installation.