Examples

Read whether a button is pressed

Prints D2's state to the serial monitor as 0 or 1, over and over.

Arduino Uno R30 libraries30 linesOverall confidence 100%

SourceRead onlybasics_digital_read_serial.ino

/* DigitalReadSerial Reads a digital input on pin 2, prints the result to the Serial Monitor This example code is in the public domain. https://docs.arduino.cc/built-in-examples/basics/DigitalReadSerial/ */ // digital pin 2 has a pushbutton attached to it. Give it a name: int pushButton = 2; // the setup routine runs once when you press reset: void setup() { // initialize serial communication at 9600 bits per second: Serial.begin(9600); // make the pushbutton's pin an input: pinMode(pushButton, INPUT); } // the loop routine runs over and over again forever: void loop() { // read the input pin: int buttonState = digitalRead(pushButton); // print out the state of the button: Serial.println(buttonState); delay(1); // delay in between reads for stability }

What the parser saw

Extracted from #include · #define · pinMode · constructor arguments. The output of a deterministic parser, not an AI.

Parts

buttonidentifier pushButton

60%

Buses

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Libraries

No libraries — read from pin names and pinMode alone.

Pin contract

An immutable contract owned by the project. It survives level changes; on a target board only the physical pins are remapped.

Logical name	Pin	Direction	Signal	Declared as
pushButton	D2	in	digital	#define

This page passes no verification gate. Logic (simulator), electrical (ERC · DRC) and physical (your confirmation) verification each run separately inside a project.

Next step

Same sketch, from simulation to PCB

The code stays as it is. Run it on avr8js in the Playground; import it into a project and the 8-pass electrical verification, KiCad board generation and Gerber export follow.

Run in Playground Import into a project