// Heat Pump Simulator with Serial communication

//////This setup is a miniature model of a real district heating system.

///It helps to test and demonstrate:

//Communication protocols (serial, MQTT, etc.).

///Real-time data streaming.

//Control commands from an AI optimizer.

///Visualization of heat plant operation./////





float currentOutput = 0;  // kWh heat output

void setup() {
  Serial.begin(115200);
  randomSeed(analogRead(0));  // Initialize random generator
}

void loop() {
  // Simulate small natural fluctuations if no command received
  currentOutput += random(-10, 11) / 100.0; // +/-0.1 kWh variation
  if (currentOutput < 0) currentOutput = 0;
  if (currentOutput > 1000) currentOutput = 1000; // max limit

  // Send current output every 2 seconds
  Serial.print("heat_pump_output:");
  Serial.println(currentOutput, 2);  // 2 decimals

  // Check for command from edge device
  if (Serial.available()) {
    String command = Serial.readStringUntil('\n');
    command.trim();

    // Command format: SET_OUTPUT:500
    if (command.startsWith("SET_OUTPUT:")) {
      String valueStr = command.substring(11);
      float newOutput = valueStr.toFloat();
      if (newOutput >= 0 && newOutput <= 1000) {
        currentOutput = newOutput;
        Serial.print("OUTPUT_SET_TO:");
        Serial.println(currentOutput, 2);
      } else {
        Serial.println("ERROR:Invalid output value");
      }
    } else {
      Serial.println("ERROR:Unknown command");
    }
  }

  delay(2000); // wait 2 seconds
}