Wokwi

Intro

Sample (Blink)

https://wokwi.com/projects/344891652101374548

// the setup function runs once when you press reset or power the board
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
}
 

Blink (Built-in LED)

https://wokwi.com/projects/415962180991547393

Examples

CIRCUIT_1A-BLINK

https://learn.sparkfun.com/tutorials/sparkfun-inventors-kit-experiment-guide---v41/circuit-1a-blink-an-led

CIRCUIT_1A-BLINK - Wokwi ESP32, STM32, Arduino Simulator