dinnerbell/DinnerSend/DinnerSend.ino

// FireBeetle 2 ESP32-E
// 5v power for the LEDs taken from the
// bottom of the board under the USB connector.
// 470 Ohm resistor between the data line and the LED strip.
// See https://esp32io.com/tutorials/esp32-ws2812b-led-strip
#include <Adafruit_NeoPixel.h>
#include <WiFi.h>
#include <esp_now.h>

#define LED_PIN 16
#define BUTTON_PIN 12
#define NUMPIXELS 8

#define ESPNOW_WIFI_CHANNEL 6

Adafruit_NeoPixel pixels(NUMPIXELS, LED_PIN, NEO_GRB + NEO_KHZ800);

// Button variables
bool lastButtonState = HIGH;
bool currentButtonState = HIGH;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

// Broadcast MAC address for ESP-NOW
uint8_t recvMAC[] = {0x08, 0x3A, 0xF2, 0x39, 0x0A, 0xA8};
// 08:3A:F2:39:0A:A8

#define DELAYVAL 250

// Dinner alert state
// bool dinnerAlert = false;
// unsigned long dinnerStartTime = 0;
// unsigned long lastBlinkTime = 0;
// bool ledState = false;

void sendDinnerMessage() {
  const char *message = "dinner";
  esp_err_t result = esp_now_send(recvMAC, (uint8_t *)message, strlen(message));

  if (result == ESP_OK) {
    Serial.println("Dinner message sent successfully");
  } else {
    Serial.println("Error sending dinner message");
  }
}

void onDataReceived(const esp_now_recv_info *mac_addr,
                    const unsigned char *data, int data_len) {
  char message[data_len + 1];
  memcpy(message, data, data_len);
  message[data_len] = '\0';

  Serial.print("Received message: ");
  Serial.println(message);

  if (strcmp(message, "dinner_ack") == 0) {
    Serial.println("Dinner ack received!");
    // dinnerAlert = true;
    // dinnerStartTime = millis();
    // lastBlinkTime = millis();
    // ledState = false;
  }
}

void setup() {
  Serial.begin(115200);
  // while (!Serial){
  //   delay(10);
  // }
  // Serial.println("setup");
  // pixels.begin();

  pinMode(LED_BUILTIN, OUTPUT);

  // Initialize button pin
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Initialize WiFi in station mode
  WiFi.mode(WIFI_STA);
  WiFi.setChannel(ESPNOW_WIFI_CHANNEL);
  while (!WiFi.STA.started()) {
    delay(100);
  }

  // Initialize ESP-NOW
  if (esp_now_init() != ESP_OK) {
    Serial.println("Error initializing ESP-NOW");
    return;
  }

  // Register callback function
  esp_now_register_recv_cb(onDataReceived);

  // Add peer
  esp_now_peer_info_t peerInfo;
  memset(&peerInfo, 0, sizeof(peerInfo));
  memcpy(peerInfo.peer_addr, recvMAC, 6);
  peerInfo.channel = ESPNOW_WIFI_CHANNEL;
  peerInfo.encrypt = false;

  if (esp_now_add_peer(&peerInfo) != ESP_OK) {
    Serial.println("Failed to add broadcast peer");
    return;
  }
  Serial.println("Dinner SEND");
  Serial.println("Wi-Fi parameters:");
  Serial.println("  Mode: STA");
  Serial.println("  MAC Address: " + WiFi.macAddress());
  Serial.printf("  Channel: %d\n", ESPNOW_WIFI_CHANNEL);
}

// void blinkAllLEDs() {
//   if (millis() - lastBlinkTime >= 500) { // Blink every 500ms
//     lastBlinkTime = millis();
//     ledState = !ledState;

//     if (ledState) {
//       // Turn on all LEDs with bright red color for dinner alert
//       for (int i = 0; i < NUMPIXELS; i++) {
//         pixels.setPixelColor(i, pixels.Color(255, 0, 0));
//       }
//     } else {
//       // Turn off all LEDs
//       pixels.clear();
//     }
//     pixels.show();
//   }
// }

// void normalAnimation() {
//   pixels.clear();
//   for (int i = 0; i < NUMPIXELS; i++) {
//     pixels.setPixelColor(i, pixels.Color(64, 255, 128));
//     pixels.show();
//     delay(DELAYVAL);
//   }
// }

// void dinnerAnimation() {
//   // Check if 60 seconds have passed
//   if (millis() - dinnerStartTime >= 5 * 1000) {
//     dinnerAlert = false;
//     Serial.println("Dinner alert timeout - returning to normal mode");
//     pixels.clear();
//     pixels.show();
//   } else {
//     blinkAllLEDs();
//   }
// }

void checkButton() {
  int reading = digitalRead(BUTTON_PIN);

  digitalWrite(LED_BUILTIN, !reading);

  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != currentButtonState) {
      currentButtonState = reading;

      // Button pressed (LOW because of INPUT_PULLUP)
      if (currentButtonState == LOW) {
        Serial.println("Button pressed! Sending dinner message...");
        sendDinnerMessage();
      }
    }
  }

  lastButtonState = reading;
}

void loop() {
  checkButton();

  // Check if dinner alert is active
  // if (dinnerAlert) {
  //   dinnerAnimation();
  // } else {
  //   normalAnimation();
  // }
}