Untitled

var weight = msg.payload; // Weight in kgs
var temperature = Math.floor(Math.random() * (42 - 34 + 1)) + 34; // Random temperature between 34 and 42

if (weight > 20) {
    if (temperature >= 34 && temperature <= 42) {
        msg.payload = {
            occupied: true,
            weight: weight,
            temperature: temperature,
            fanStatus: "ON"
        };
    } else {
        msg.payload = {
            occupied: false,
            weight: weight,
            temperature: temperature,
            fanStatus: "OFF"
        };
    }
} else {
    msg.payload = {
        occupied: false,
        weight: weight,
        temperature: temperature,
        fanStatus: "OFF"
    };
}

return msg;