// Switch on TP0 drives the pump relay
#define RELAY_PIN 5

SME_LISTEN(TP0) {
  int on = data.toInt();      // 1 = on, 0 = off
  digitalWrite(RELAY_PIN, on);
  SME.publish(TP3, on);       // LED widget shows the real state
}

// Slider on TP1 sets the speed (0 - 100)
SME_LISTEN(TP1) {
  int speed = data.toInt();
  analogWrite(4, map(speed, 0, 100, 0, 1023));
}

// Value, Gauge and Graph read what you publish
unsigned long last = 0;

void loop() {
  SME.run();

  if (millis() - last > 2000) {   // every 2 s
    last = millis();
    float temp = readTemperature();  // your sensor
    float flow = readFlow();
    SME.publish(TP4, temp);      // Value
    SME.publish(TP5, flow);      // Gauge
    SME.publish(TP6, temp);      // Graph
  }
}