Shelly watchdog - restart

// This script tries to execute HTTP GET requests within a set time, against a set of endpoints
// After certain number of failures the script resets the shelly

let CONFIG = {
  endpoints: [
    "https://global.gcping.com/ping",
    "https://us-central1-5tkroniexa-uc.a.run.app/ping",
  ],
  //number of failures that trigger the reset
  numberOfFails: 5,
  //time in seconds after which the http request is considered failed
  httpTimeout: 10,
  //time in seconds to retry a "ping"
  pingTime: 60,
};

let endpointIdx = 0;
let failCounter = 0;
let pingTimer = null;

function pingEndpoints() {
  Shelly.call(
    "http.get",
    { url: CONFIG.endpoints[endpointIdx], timeout: CONFIG.httpTimeout },
    function (response, error_code, error_message) {
      //http timeout, magic number, not yet documented
      if (error_code === -114) {
        print("Failed to fetch ", CONFIG.endpoints[endpointIdx]);
        failCounter++;
        print("Rotating through endpoints");
        endpointIdx++;
        endpointIdx = endpointIdx % CONFIG.endpoints.length;
      } else {
        failCounter = 0;
      }

      if (failCounter >= CONFIG.numberOfFails) {
        print("Too many fails, resetting...");
        failCounter = 0;
        Timer.clear(pingTimer);
        Shelly.call("Shelly.Reboot");
      }
    }
  );
}

print("Start watchdog timer");
pingTimer = Timer.set(CONFIG.pingTime * 1000, true, pingEndpoints);