https://code-reference.com/ 2026-05-18T16:48:07+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-02-16T01:04:06+02:00 https://code-reference.com/arduino/digital_io/digitalread?rev=1708041846&do=diff Description Reads the value from a specified digital pin, either HIGH or LOW. Syntax digitalRead(pin) Parameters pin: the number of the digital pin you want to read (int) Returns HIGH or LOW Example int ledPin = 13; // LED connected to digital pin 13 int inPin = 7; // pushbutton connected to digital pin 7 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the digital pin 13 as output pinMode(inPin, INPUT); // sets the d… text/html 2024-02-16T01:04:06+02:00 https://code-reference.com/arduino/digital_io/digitalwrite?rev=1708041846&do=diff Description Write a HIGH or a LOW value to a digital pin. If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW. If the pin is configured as an INPUT, writing a HIGH value with digitalWrite() will enable an internal 20K pullup resistor. Writing LOW will disable the pullup. The pullup resistor is enough to light an LED dimly, so if LEDs appear to work, but very dimly, this is a… text/html 2024-02-16T01:04:06+02:00 https://code-reference.com/arduino/digital_io/pinmode?rev=1708041846&do=diff Description Configures the specified pin to behave either as an input or an output. As of Arduino 1.0.1, it is possible to enable the internal pullup resistors with the mode INPUT_PULLUP. Additionally, the INPUT mode explicitly disables the internal pullups.