solar-charging-switch/switch.js

function initialize() {
  Shelly.call("Switch.GetStatus",
    { id: CONFIG.switchId },
    function (res, error_code, error_msg, ud) {
      print("Initializing... current switch state is:", res.output)
      switchIsOpen = res.output;
      runLoop();
    },
    null
  );
}

function runLoop() {
  let alertTimer = Timer.set(
      CONFIG.pollingInterval,
      true, // Run periodically
      function (ud) {
          Shelly.call("HTTP.REQUEST",
            { method: "POST", url: CONFIG.pollingUrl, body: '{"801":{"170":null}}', timeout: 10 },
            function (res, error_code, error_msg, ud) {
              print("errors-http-post:", error_code, error_msg);
              if (error_code === 0) {
                let parsedBody = JSON.parse(res.body);
                let production = parsedBody["801"]["170"]["101"];
                let consumption = parsedBody["801"]["170"]["110"];
                print("read production and consumption", production, consumption)
                let threshold;
                if (switchIsOpen) {
                  threshold = consumption;
                } else {
                  threshold = consumption + CONFIG.chargingConsumption;
                }
                // print(threshold);
                if (production > threshold) {
                  if (!switchIsOpen) {
                    setSwitch(true);
                  }
                } else {
                  if (switchIsOpen) {
                    setSwitch(false);
                  }
                }
              }
            },
            null
          );
      },
      null
  );
}

function setSwitch(on) {
  Shelly.call("Switch.Set",
    { id: CONFIG.switchId, on: on },
    function (res, error_code, error_msg, ud) {
      print("errors-switch-set:", error_code, error_msg);
      let newSwitchState = !res["was_on"];
      switchIsOpen = newSwitchState;
      print("Changed switch state to:", newSwitchState);
    },
    null
  );
}

let CONFIG = {
  pollingInterval: 60 * 1000,
  pollingUrl: "192.168.178.101/getjp",
  switchId: 0,
  chargingConsumption: 2100,
};

let switchIsOpen;

initialize();