Example Code for Arduino-Button Control LED Flashing

Hardware Preparation

• DFR0305 RoMeo BLE x1
• FIT0265 micro USB line x1

Software Preparation

• Download Arduino IDE: Click to download Arduino IDE

Other Preparation Work

RoMeo BLE integrated 5 buttons, S1 to S5, which are controlled by Anolog Port 7. Switch it on as shown in the following figure when using analog buttons.

Sample Code

int potPin = 7;
int ledPin = 13;
int val = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  val = analogRead(potPin);
  digitalWrite(ledPin, HIGH);  // Open the LED.
  delay(val);
  digitalWrite(ledPin, LOW);   // Close the LED.
  delay(val);
}

Result

Different frequencies of the LED flashing will be seen when pressing buttons of S1 to S2.