> For the complete documentation index, see [llms.txt](https://docs.irs.systems/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.irs.systems/iot/device-onboarding/shelly-3em-pro.md).

# Shelly 3EM Pro

### Onboard via Shelly Web UI

1. Open the device in the Shelly Web UI.
2. Go to **Scripts**.
3. Click **Add script**.
4. Paste the onboarding script.
5. Set `INGEST_INTERVAL_MS` and `API_KEY`.
6. Save the script.
7. Start the script.
8. Check the logs for a successful request.

```javascript

let INGEST_URL = "https://api.irs.systems/functions/v1/iot-ingest-telemetry";
let API_KEY = "dk_3230af..";
let INGEST_INTERVAL_MS = 600000;  // 10 minutes

Timer.set(INGEST_INTERVAL_MS, true, function () {
    Shelly.call("EM.GetStatus", { id: 0 }, function (emResult, emError) {
        if (emError) {
            print("Error reading EM:", emError);
            return;
        }

        Shelly.call("EMData.GetStatus", { id: 0 }, function (edResult, edError) {
            if (edError) {
                print("Error reading EMData:", edError);
                return;
            }

            let payload = {
                timestamp: new Date().toISOString(),
                total_power: emResult.total_act_power,
                total_energy: edResult.total_act,
                device_mac: Shelly.getDeviceInfo().mac,
            };

            Shelly.call(
                "HTTP.Request",
                {
                    method: "POST",
                    url: INGEST_URL,
                    headers: {
                        "Content-Type": "application/json",
                        "x-api-key": API_KEY,
                    },
                    body: JSON.stringify(payload),
                },
                function (res, err) {
                    if (err) {
                        print("HTTP Error:", err);
                    } else {
                        print("Sent to Supabase:", res.code);
                    }
                }
            );
        });
    });
});
```


---

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