bouton-evenement.ino
Each press publishes a JSON event to the Particle cloud, readable by other boards (subscribers) or a webhook. The debounce wiring matches bare Arduino: the framework just adds the publish layer.
Hardware
A Particle Boron module (nRF52840, Wi-Fi + Bluetooth LE, cellular variant where applicable) with on-board antenna. 1 push button between D2 and GND.
Wiring
Button between D2 and GND; the pull-up resistor is internal (INPUT_PULLUP).
How it works
After edge validation (30 ms), snprintf builds a JSON frame and Particle.publish sends it to the cloud. Subscribers (Particle.subscribe) and webhooks receive it near real time.
Running it
Install the Particle CLI (particle setup), flash with particle flash --serial or OTA (particle flash <name> firmware.bin). The Device Cloud app or REST API complete the deployment.
Variants
Also publish the internal temperature (getTemperature), or trigger a local action on a received event (subscribe + handler).
bouton-evenement.ino
// Bouton sur D2 : publish d'un evenement cloud a chaque appui.
int bouton = D2; // bouton vers GND, patte libre sur D2
bool etatPrecedent = HIGH;
unsigned long dernierBord = 0;
void setup() {
pinMode(bouton, INPUT_PULLUP);
Serial.begin(9600);
}
void loop() {
bool lecture = digitalRead(bouton);
unsigned long maintenant = millis();
if (lecture != etatPrecedent) {
dernierBord = maintenant;
}
if (maintenant - dernierBord >= 30 && lecture != etatPrecedent) {
etatPrecedent = lecture;
if (lecture == LOW) { // appui (PULLUP -> LOW)
char trame[48];
snprintf(trame, sizeof(trame),
"{\"appui\":%lu,\"uptime\":%lu}",
millis(), millis());
bool ok = Particle.publish("bouton-presse", trame, 60, PUBLIC);
Serial.println(ok ? "evenement publie" : "publication refusee");
// NB : limite de flux cloud ~1 publish/s : ne pas spammer.
}
}
}