trunet

blueprint:
  name: Low battery level detection & notification for all battery sensors
  description: Regularly test all sensors with 'battery' device-class for crossing
    a certain battery level threshold and if so execute an action.
  domain: automation
  input:
    threshold:
      name: Battery warning level threshold
      description: Battery sensors below threshold are assumed to be low-battery (as
        well as binary battery sensors with value 'on').

trunet

// Embedded in this article https://medium.com/p/c98e491015b6
package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"time"