Skip to content

Instantly share code, notes, and snippets.

@johnwargo
Last active October 29, 2023 17:18
Show Gist options
  • Save johnwargo/6effb27c2e632674eb3774be9180b88c to your computer and use it in GitHub Desktop.
Save johnwargo/6effb27c2e632674eb3774be9180b88c to your computer and use it in GitHub Desktop.
An even better version of the Arduino random smoke generator
#define SMOKE_PIN A0
#define MIN_TIME 1000
#define MAX_TIME 5000
bool isSmoking = false;
int timerDuration = 0;
unsigned long startTime;
void setup() {
// configure the output pin to control the smoke generator
pinMode(SMOKE_PIN, OUTPUT);
// Enable the Arduino device's onboard LED
pinMode(LED_BUILTIN, OUTPUT);
// start making smoke. You can do this later based
// on some other trigger if you want
setSmokeState(true);
}
void loop() {
// ===
// do some stuff
// ===
checkSmokeState();
// ===
// do some other stuff
// ===
}
void setSmokeState(bool smokeState) {
uint8_t state = smokeState ? HIGH : LOW;
digitalWrite(SMOKE_PIN, state);
digitalWrite(LED_BUILTIN, state);
isSmoking = smokeState;
startTime = millis();
timerDuration = (int)random(MIN_TIME, MAX_TIME); // milliseconds
}
void checkSmokeState() {
// Set `timerDuration` to 0 to stop/disable this process
if (timerDuration > 0) {
// check to see if enough time's passed since the timer started
if ((millis() - startTime) > timerDuration) {
// timer expired, so time to switch modes
setSmokeState(!isSmoking);
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment