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#include <WiFi.h>
#include <PubSubClient.h>
#include <Arduino.h>
#include "./local.h" // defines ssid and password
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);
#define BUTTON_PIN 14
#define LED_PIN 2
long lastMsg = 0;
long lastButtonState = LOW; // High/1 by default, Low/0 when pressed
// Reconnect to the wifi / MQTT if required
void reconnect() {
if (WiFi.status() != WL_CONNECTED) {
WiFi.begin(ssid, password);
}
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print("waiting for wifi, status=");
Serial.println(WiFi.status());
}
while (!mqttClient.connected()) {
Serial.println("attempting mqtt connection...");
mqttClient.setServer(mqtt_broker, mqtt_port);
if (!mqttClient.connect("Bark-Button")) {
Serial.print("failed to connect to mqtt, rc=");
Serial.println(mqttClient.state());
delay(2000);
}
}
}
// On button press, send a message to the MQTT broker
void buttonPress() {
char buf[40];
reconnect();
sprintf(buf, "barks/%d.mp3", random(n_bark_sounds));
mqttClient.publish(mqtt_topic, buf);
}
void setup() {
Serial.begin(9600);
reconnect();
pinMode(BUTTON_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
}
// Wait for button press
void loop() {
mqttClient.loop();
int buttonState = digitalRead(BUTTON_PIN);
if (buttonState != lastButtonState && buttonState == LOW) {
digitalWrite(LED_PIN, HIGH);
buttonPress();
delay(100);
digitalWrite(LED_PIN, LOW);
}
lastButtonState = buttonState;
}
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