auto-cycle.js

/*
  Casually working on a shelly script to automatically restart
  an unstable connection based on something.

  In this case, floating average of ping measurements from an URL.
  
  Very early prototype.
*/

const act_if_over_ms = 4.0;
const leave_off_for_secs = 2;
const check_interval_secs = 10;
const mock_ms_url = "http://192.168.1.11/shelly-test/test.json";

function act_on_measurement(current_ms) {
  print("function: act_on_measurement()");
  print("current_ms:", current_ms, "- act_if_over_ms:", act_if_over_ms);
  if (current_ms > act_if_over_ms) {
    print("Cycling power");
    Shelly.call("Switch.Set", {id: 0, on: false, toggle_after: leave_off_for_secs});
  }
}

function extract_measurement(result, error_code, error_message) {
  print("function: extract_status");
  print("HTTP status code and message:", result.code, result.message);
  if(result.code !== 200) {
    print("Refusing to act on non-OK/200 HTTP status");
    return;
  }
  print("Response body:");
  print(result.body);
  let current_ms = (JSON.parse(result.body)).ms;
  act_on_measurement(current_ms);
}

function retrieve_measurement() {
  print("function: retrieve_measurement - ", mock_ms_url);
  Shelly.call("HTTP.GET", {url: mock_ms_url}, extract_measurement);
}

print("Start timer");
let timer = Timer.set(check_interval_secs * 1000, true, retrieve_measurement);
print("Initial invocation");
retrieve_measurement();