Is there a possibility to check if Home Assistant is up and running by script?

Georg64 · February 2, 2024 at 10:08 PM

Hallo everyone,
I'm very new to Shelly and also to scripting.

I have got Home Assistant running on a Raspery Pi in my office and sometimes it crashes. To be able to turn the Raspberry of and on from home when it happens I got a Shelly PlugS. works like a charm with the interface and also with webhooks.

The vision would be to have a script that checks if HassOS is up and running and if not to turn itself off and on again to restart the home automation.

Does anyone know a simple way how to accomplish that? Maybe by checking the webinterface? I did quite some research but can't figure it out myself. Raspberry and PlugS are in the same network.

Thanks a lot in advance,
Georg

Hiegeix7 · February 2, 2024 at 10:59 PM

Is your Raspery Pi reachable by ping, whenever it “crashes”?
That Test would be the most easy and cheap one.

Ancient#Moon#89446 · February 3, 2024 at 8:32 AM

Hi,

I solved this challenge with:

- A "Heathbeat" signal [binary sensor / with a toogle signal] / via helper (random) functionality

- This signal is connected to MQTT

- The Shelly script read the MQTT binary and after 900 seconds no signal-change a email is send to myself.

HTML

/// Check running Home Assistant (Email) V1
//
let counter = [0, 0, 0, 0, 0];
let log = 1;
// set this to false to stop publishing on MQTT
let MQTTpublish = true;
let MQTTconnect = false;
let EmailIsSend = false;
let topicHeartBeat = "Home Assistant/HeartBeat"

let maximumCycle = 0;

// query the MQTT prefix on startup
let SHELLY_ID = undefined;
Shelly.call("Mqtt.GetConfig", "", function(res, err_code, err_msg, ud) {
    MQTT.subscribe(topicHeartBeat, MQTTCmdListener);
    SHELLY_ID = res["topic_prefix"];
});
///
function MQTTCmdListener(topic, message) {
    if (topic === topicHeartBeat) {
        maximumCycle = Math.max(maximumCycle, counter[1]);
        EmailIsSend = false;
        counter[1] = 0;
    }
}
///
function timerHandler(user_data) {
    MQTTconnect = MQTT.isConnected();
    ///
    if ((EmailIsSend == false) && (counter[1] >= 900)) {
        sendEmailNotification(counter[1], maximumCycle);
        EmailIsSend = true;
    }
    ///
    if (counter[0] >= 5 && log != 0) {
        print("HeartBeat: " + counter[1] + " / " + maximumCycle + " / " + EmailIsSend);
        counter[0] = 0;
    }
    ///
    for (let i = 0; i < counter.length; i++) {
        counter[i] = counter[i] + 1;
    }
}
///
Timer.set(1000, true, timerHandler, null);
///
function sendEmailNotification(counterCycle, maxCycle) {
    const apiKey =
        "xkeysib-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; // YOUR API KEY

    let apiUrl = "https://api.brevo.com/v3/smtp/email";
    let headers = {
        "api-key": apiKey,
    };

    let body = {
        sender: {
            name: "xxxxxxxxxxxx", // Name of the sender
            email: "noreply@homeassistant.home", // Email of the sender
        },
        // email can be sent to multiple emails
        to: [{
                name: "XXXXXX", // Name of first receiver
                email: "XXXXXX@gmx.at", // Email of first receiver
            },
            /*            {
                            name: "XXXXX", // Name of second receiver
                            email: "XXXXXX@gmail.com", // Email of second receiver
                        },*/
        ],
        subject: "Missing Home Assistant Heartbeat",
        htmlContent: "<html><body>Dear XXXXXX,<br><br>" +
            "Cycle:" + counterCycle + " seconds<br>" +
            "MaxCycle:" + maxCycle + " seconds<br><br>" +
            "Best regards, xxx</body></html>"
    };

    Shelly.call(
        "HTTP.Request", {
            method: "POST",
            url: apiUrl,
            headers: headers,
            body: body,
        },
        function(result, errorCode, errorMessage) {
            if (errorCode === 0) {
                console.log("Successfully sent email. Result is:", result.body);
            } else {
                console.log("There was an error sending the email:", errorMessage);
            }
        }
    );
}

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lg

Hummelchen

Ancient#Moon#89446 · February 3, 2024 at 8:44 AM

Hiegeix7

Quote from Hiegeix7

Is your Raspery Pi reachable by ping, whenever it “crashes”?
That Test would be the most easy and cheap one.

My experiences show that Raspi with ping is available but Home Assistant is crashed.

lg

Hummelchen

ostfriese · February 3, 2024 at 9:23 AM

If the Raspberry is still on and reachable, the better way is, to send a shutdown -r now.

Just turn off and on by cutting the power supply can end in a total failure of the operating system.

But the problem is that Shellys don't know ssh. However, the problem can be solved with a little http server in python

If needed I can deliver that piece of code. So you can reboot the Raspberry by a simple http://<raspberry_ip>/reboot.