include

include // Library for internal LED strip

const char ssid = "HWS-IOT"; const char password = "*HWSFI#2024";

const char mqtt_server = "mqtt-broker.zdw31.cloud"; const int mqtt_port = 1883; const char mqtt_username = "user1"; const char mqtt_password = "HWSFI2024!"; const char mqtt_topic = "distance";

WiFiClient client; Adafruit_MQTT_Client mqtt(&client, mqtt_server, mqtt_port, mqtt_username, mqtt_password);

SONIC_I2C sensor; Adafruit_MQTT_Publish distancePub = Adafruit_MQTT_Publish(&mqtt, mqtt_topic);

const int maxDataPoints = 10; // Number of data points to display in the table float distanceData[maxDataPoints] = {0}; // Array to store distance data unsigned long lastUpdate = 0; // Last time the screen was updated const int updateInterval = 1000; // Update interval in milliseconds

const int pirPin = 36; // PIR Sensor Pin const int ledPin = 15; // Internal LED strip pin

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, ledPin, NEO_GRB + NEO_KHZ800);

void MQTT_connect() { int8_t ret; Serial.print("Connecting to MQTT... "); uint8_t retries = 3; while ((WiFi.status() != WL_CONNECTED) && (retries > 0)) { WiFi.begin(ssid, password); Serial.println("Attempting to connect to Wi-Fi..."); delay(5000); retries--; }

if (retries == 0) { Serial.println("Failed to connect to Wi-Fi"); return; }

Serial.println("Wi-Fi connected"); Serial.print("IP address: "); Serial.println(WiFi.localIP());

Serial.println("Connecting to MQTT..."); retries = 3; while ((ret = mqtt.connect()) != 0 && retries > 0) { Serial.println(mqtt.connectErrorString(ret)); Serial.println("Retrying MQTT connection in 5 seconds..."); delay(5000); retries--; }

if (retries == 0) { Serial.println("Failed to connect to MQTT"); return; }

Serial.println("MQTT Connected!"); }

void setup() { M5.begin(); sensor.begin(); pixels.begin(); // Initialize internal LED strip pinMode(pirPin, INPUT); // PIR Sensor Pin as Input Serial.begin(9600);

// Connect to Wi-Fi and MQTT MQTT_connect();

// Setup screen M5.Lcd.fillScreen(BLACK); M5.Lcd.setTextFont(1); M5.Lcd.setTextSize(2); M5.Lcd.setTextColor(WHITE); }

void updateTable(float value) { for (int i = maxDataPoints - 1; i > 0; i--) { distanceData[i] = distanceData[i - 1]; // Shift data } distanceData[0] = value; // Insert new data at the beginning

// Clear previous table and display current data M5.Lcd.fillRect(0, 0, 320, 240, BLACK); M5.Lcd.setCursor(0, 0); M5.Lcd.print("Batt: "); // Battery durch Batt ersetzt M5.Lcd.print(String(M5.Power.getBatteryLevel()) + "%");

M5.Lcd.setCursor(160, 0); M5.Lcd.print("MQTT: "); if (mqtt.connected()) { M5.Lcd.print("M"); // MQTT verbunden: "M" } else { M5.Lcd.print("MD"); // MQTT getrennt: "MD" }

M5.Lcd.setCursor(220, 0); M5.Lcd.print("WIFI: "); if (WiFi.status() == WL_CONNECTED) { M5.Lcd.print("W"); // WLAN verbunden: "W" } else { M5.Lcd.print("WD"); // WLAN getrennt: "WD" }

M5.Lcd.setCursor(0, 20); M5.Lcd.print("Distance Table:");

for (int i = 0; i < maxDataPoints; i++) { M5.Lcd.setCursor(0, 40 + i * 20); M5.Lcd.print("Entry " + String(i + 1) + ": "); M5.Lcd.print(distanceData[i]); M5.Lcd.print(" mm"); } }

void loop() { if (!mqtt.connected()) { MQTT_connect(); }

unsigned long currentMillis = millis();

if (currentMillis - lastUpdate >= updateInterval) { float distance = sensor.getDistance(); if (distance >= 0 && distance <= 2000) { // Publish distance to MQTT if within valid range distancePub.publish(distance); Serial.println("Published distance: " + String(distance) + "mm"); } else { Serial.println("Invalid distance value: " + String(distance)); }

// Update table regardless of MQTT publishing
updateTable(distance);

// Check motion sensor
bool motionDetected = (digitalRead(pirPin) == HIGH);
if (motionDetected) {
  // Turn on internal LED strip if motion detected
  if (distance > 1000) {
    // Green color if distance over 1000mm
    pixels.setPixelColor(0, pixels.Color(0, 255, 0)); 
  } else {
    // Red color if distance under or equal to 1000mm
    pixels.setPixelColor(0, pixels.Color(255, 0, 0)); 
  }
} else {
  // Turn off internal LED strip if no motion
  pixels.setPixelColor(0, pixels.Color(0, 0, 0)); 
}
pixels.show();

// Display connection status on serial monitor
Serial.print("WiFi:");
if (WiFi.status() == WL_CONNECTED) {
  Serial.print("Connected ");
} else {
  Serial.print("Disconnected ");
}

Serial.print("MQTT:");
if (mqtt.connected()) {
  Serial.println("Connected ");
} else {
  Serial.println("Disconnected ");
}

lastUpdate = currentMillis;

} }

turbomatte / M5Stack_E2FS

IMP: Flash M5Stack #26

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include // Library for internal LED strip