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User LEDs
This documentation includes installation guidelines and sample code for your hardware.
There are two user LEDs available onboard.
- LED 1 (Blue): D2.
- LED 2 (Red): D3.
There is no need to add a library to control LEDs. All you need to do is defining LED pin numbers, setting pin directions and controlling them.
To initialize the LEDs, first define the connections.
#define LED_B 2
#define LED_R 3
Then, set the pin directions as output.
pinMode(LED_B, OUTPUT)
pinMode(LED_R, OUTPUT)
Now, the LED configuration is ready.
Turns LEDs on or off.
digitalWrite(pin, value);
You can open the example from Arduino IDE > File > Examples > Examples from Custom Libraries > Turta MKR Sensor Shield > User LEDs. There is one example of this sensor.
This application demonstrates blinking of the LEDs.
To run the example:
- 1.Open the LED Blink sketch from the examples menu.
- 2.Select your Arduino MKR series board from the Tools > Board menu.
- 3.Select your device's COM port from Tools > Port menu.
- 4.Open Serial Monitor from Tools > Serial Monitor.
- 5.Select 115.200 baud from the Serial Monitor's status bar.
- 6.Upload the code to your device.
Sample Code
LED_Blink.ino
// Define LED connections
#define LED_B 2
#define LED_R 3
void setup() {
// Initialize LEDs
pinMode(LED_B, OUTPUT);
pinMode(LED_R, OUTPUT);
}
void loop() {
// Turn on Blue LED
digitalWrite(LED_B, HIGH);
delay(500);
// Turn on Red LED
digitalWrite(LED_R, HIGH);
delay(500);
// Turn off Blue LED
digitalWrite(LED_B, LOW);
delay(500);
// Turn off Red LED
digitalWrite(LED_R, LOW);
delay(500);
}
Result
After the application is uploaded to the device, it turns the LEDs on and off continuously.
The application runs forever until you clear it from memory.
Last modified 4yr ago