function init() {
    document.addEventListener("deviceready", watchPosition, false);
}

function watchPosition() {

    cordova.plugins.backgroundMode.enable(); // enable backgroundMode

    // Check if location settings are turned on. Prompt user if not turned on
    function onRequestSuccess(success){
        console.log("Successfully requested accuracy: "+success.message);
    }

    function onRequestFailure(error){
        console.error("Accuracy request failed: error code="+error.code+"; error message="+error.message);
        if(error.code !== cordova.plugins.locationAccuracy.ERROR_USER_DISAGREED){
            if(window.confirm("Failed to automatically set Location Mode to 'High Accuracy'. Would you like to switch to the Location Settings page and do this manually?")){
                cordova.plugins.diagnostic.switchToLocationSettings();
            }
        }
    }

    cordova.plugins.locationAccuracy.request(onRequestSuccess, onRequestFailure, cordova.plugins.locationAccuracy.REQUEST_PRIORITY_HIGH_ACCURACY);

    // start geolocation

    checkPeriodically = setInterval(checkTime, 10000);

    var watchID = navigator.geolocation.watchPosition(onSuccess, onError, options);

    ...