Her vises en række eksempler på forskællige tips til arduino’s IDE software.

Arduino:
LED_BUILTIN eller Pin 13

void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}

Når man bruger en “Knap” i sit projekt skal man ofte tilføje en “PullUp” modstand. Men med denne kode kan det undgåes.

//Info: Når PullUp funktionen aktiveres bliver indagen “GND” styret. DVS at “GND” skal tilsluttet en indgang for at aktiveres. Den indgang som har PullUp funktionen aktiveret er ALTID “HIGH“.

Kode:

int ButtonPin = 2;   

void setup() {
  pinMode(ButtonPin, INPUT_PULLUP);
}

void loop(){
 
}
 

int LedPin = 13; // choose the pin for the LED
int ButtonPin = 2;   // choose the input pin (for a pushbutton)
int val = 0;     // variable for reading the pin status

void setup() {
  pinMode(LedPin, OUTPUT);  // declare LED as output
  pinMode(ButtonPin, INPUT);    // declare pushbutton as input

}

void loop(){
  val = digitalRead(ButtonPin);  // read input value
  if (val == HIGH) {         // check if the input is HIGH (button released)
    digitalWrite(LedPin, LOW);  // turn LED OFF
  } else {
    digitalWrite(LedPin, HIGH);  // turn LED ON
  }
}

Tænd/Sluk en LED via serial forbindelse 1=ON 0=OFF.

Kode:

int led = 9;

void setup() {
pinMode(led, OUTPUT);
Serial.begin(9600);
}
void loop(){
if(Serial.available() > 0) {
char ledState = Serial.read();

if(ledState == ‘1’){
digitalWrite(led, HIGH);
}

if(ledState == ‘0’){
digitalWrite(led, LOW);
}

}

}

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); 

void setup()

{



Serial.begin(9600);

mySerial.begin(9600);

}

void loop() 

{

if (mySerial.available())

Serial.write(mySerial.read());

if (Serial.available())

{

while(Serial.available())

{

mySerial.write(Serial.read());

}

mySerial.println();

}

}

Dæmp LED via serial.

Kode:

int led = 9;

void setup() {
pinMode(led, OUTPUT);
Serial.begin(9600);
}
void loop(){
if(Serial.available() > 0) {
char Funktion = Serial.read();

if(Funktion == ‘1’){ //Dæmp fra 0% – 100%
// fade in from min to max
for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 3) {
// sets the value (range from 0 to 255):
analogWrite(led, fadeValue);
// wait for 30 milliseconds to see the dimming effect
delay(60);
}
}

if(Funktion == ‘2’){ //Dæmp fra 100% – 0%
// fade out from max to min
for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 3) {
// sets the value (range from 0 to 255):
analogWrite(led, fadeValue);
// wait for 30 milliseconds to see the dimming effect
delay(60);
}
}

if(Funktion == ‘3’){ //Dæmp fra 100% – 50%
// fade out from max to min
for (int fadeValue = 255 ; fadeValue >= 7; fadeValue -= 3) {
// sets the value (range from 0 to 255):
analogWrite(led, fadeValue);
// wait for 30 milliseconds to see the dimming effect
delay(60);
}
}

if(Funktion == ‘4’){ //Dæmp fra 50% – 100%
// fade in from min to max
for (int fadeValue = 7 ; fadeValue <= 255; fadeValue += 3) {
// sets the value (range from 0 to 255):
analogWrite(led, fadeValue);
// wait for 30 milliseconds to see the dimming effect
delay(60);
}
}

}

}