Background-Daemon/plugins/fuel_check.py

"Fuel Check"
import time

from daemon import DaemonPlugin

class FuelCheck(DaemonPlugin):
    start = None
    last_message = None
    threshold = 5

    def initialize(self):
        "Initialize plugin"
        self.start = time.monotonic()

    def check(self, data):
        "Checks if the fuel ratio is below a certain threshold"
        if "FuelRatio" not in data:
            return

        ratio = data["FuelRatio"]
        if ratio <= self.threshold:
            if self.last_message is None:
                desc = f"Only {int(ratio)}% fuel left. Please refill the tank."
                self.speak(desc)
                self.emit("switchPlugin", {
                    "plugin": "warning",
                    "data": {
                        "title": "Low Fuel",
                        "description": desc
                    },
                    "time": 5000
                })
                self.last_message = time.monotonic()
        else:
            self.last_message = None