let now = new Date();

let seconds = now.getSeconds();

// Create a base moisture level that follows a sine wave (like a daily cycle)

// The value will oscillate between 40 and 60

let baseMoisture = 50 + 10 Math.sin(seconds 2 * Math.PI / 60);

// Add some random "noise" to make it more realistic (+/- 2.5)

let noise = (Math.random() * 5) - 2.5;

let finalMoisture = baseMoisture + noise

// Set the message payload to our final value, formatted to 2 decimal places

msg.payload = parseFloat(finalMoisture.toFixed(2));

return msg;