temperature offset tuning

7OMrapHUfvBaT1Kx

my device is Shelly H&T Gen3 on firmware v1.7.1

I'm desperately trying to offset the temperature by a custom margin - exactly -1.8°C

why? i have another non-shelly thermostat that controls a pump1 based on the temperature in room. with shelly H&T gen3 I need to control pump2 also based on the temperature. for the best effect I need both pumps to be in sync and turn on/off together. the non-shelly thermostat can't be changed nor configured (there is no offset in it)

I read somewhere in shelly forum that I can set custom value of humidity via url ignoring the gui threshold and AI failed to help me achieve it

this is what I tried:

http://192.168.1.128/temperature/0?offset=-1.8

http://192.168.1.128/settings?temperature_offset=-1.8

device is not pw protected, and ofc running in setup mode. I even tried:

HTML

<!DOCTYPE html>
<html>
<body>
<h3>Shelly H&T Gen3 Temperature Offset Setter</h3>

<input type="number" id="offset" step="0.1" placeholder="Enter offset (°C)">
<button onclick="setOffset()">Set Offset</button>

<p id="result"></p>

<script>
function setOffset() {
    var offset = parseFloat(document.getElementById("offset").value);
    var ip = "192.168.1.128"; // <-- replace with your Shelly IP
    var url = "http://" + ip + "/rpc";

    var data = {
        id: 1,
        method: "Device.SetConfig",
        params: {
            temperature_offset: offset
        }
    };

    fetch(url, {
        method: "POST",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify(data)
    })
    .then(response => response.json())
    .then(json => document.getElementById("result").innerText = JSON.stringify(json))
    .catch(err => document.getElementById("result").innerText = "Error: " + err);
}
</script>
</body>
</html>

Alles anzeigen

and also directly in console like:

Code

fetch("http://192.168.1.128/rpc", {
 method: "POST",
 headers: {"Content-Type":"application/json"},
 body: JSON.stringify({"id":1,"method":"Device.SetConfig","params":{"temperature_offset":-1.8}})
}).then(r => r.text()).then(console.log)

but nothing worked. please help me out with this. is there any way how to make it?

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