ibeacon implementation

src/config.hpp

@@ -25,6 +25,14 @@
 #define MOSQUITO_ZAPPER_PIN 8
 // There are one power relay for the socket
 #define SOCKET_CONTACTOR_PIN 9
+
+/***********************************************
+ *               iBeacon Settings              *
+ ***********************************************/
+#define ESP_MAJOR   10167
+#define ESP_MINOR   61958
+// UUID is now dynamically generated per device from MAC address
+
 /***********************************************
  *               Air Conditioner               *
  ***********************************************/
@@ -88,4 +96,4 @@
 #define AQI_REQUEST_TOPIC "/iqair/request"
 #define AC_LOCK_RELATIVE_TOPIC "/ac/lock"
 #define AC_TEMP_LOWER_BOUND_RELATIVE_TOPIC "/ac/temp_bound/lower"
-#define AC_TEMP_UPPER_BOUND_RELATIVE_TOPIC "/ac/temp_bound/upper"
+#define AC_TEMP_UPPER_BOUND_RELATIVE_TOPIC "/ac/temp_bound/upper"

src/main.cpp

@@ -36,10 +36,46 @@ CUDDisplay cudDisplay = CUDDisplay(&cud_display_conf);
 ESPMegaDisplayOTA cudDisplayOTA = ESPMegaDisplayOTA();
 ESPMegaDisplayOTA internalDisplayOTA = ESPMegaDisplayOTA();
 
+// iBeacon configuration
+static esp_ble_adv_params_t ble_adv_params = {
+    .adv_int_min = 0x20,
+    .adv_int_max = 0x40,
+    .adv_type = ADV_TYPE_NONCONN_IND,
+    .own_addr_type = BLE_ADDR_TYPE_PUBLIC,
+    .channel_map = ADV_CHNL_ALL,
+    .adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
+};
+
+esp_ble_ibeacon_vendor_t vendor_config_custom;
+
 /************************************************
  *            End of Global Variables           *
  ************************************************/
 
+/**
+ * Generate a unique UUID based on ESP32's chip ID
+ * @param uuid Output buffer for the UUID (16 bytes)
+ */
+void generate_unique_uuid(uint8_t *uuid) {
+  // Get ESP32 chip ID (6 bytes)
+  uint8_t mac[6];
+  esp_efuse_mac_get_default(mac);
+  
+  // Use a fixed prefix (8 bytes)
+  static const uint8_t prefix[8] = {0xFD, 0xA5, 0x06, 0x93, 0xA4, 0xE2, 0x4F, 0xB1};
+  
+  // Copy prefix to first 8 bytes of UUID
+  memcpy(uuid, prefix, 8);
+  
+  // Copy MAC address to next 6 bytes
+  memcpy(uuid + 8, mac, 6);
+  
+  // Fill the remaining 2 bytes with a hash of the MAC
+  uint16_t hash = mac[0] + (mac[1] << 8) + mac[2] + (mac[3] << 8) + mac[4] + (mac[5] << 8);
+  uuid[14] = hash & 0xFF;
+  uuid[15] = (hash >> 8) & 0xFF;
+}
+
 void setup()
 {
   // Initialize both displayports
@@ -122,6 +158,30 @@ void setup()
   espmega.iot->registerMqttCallback(handle_mqtt_message);
   cudDisplayOTA.begin("/cuddisp", &cudDisplay, espmega.webServer);
   internalDisplayOTA.begin("/intdisp", espmega.display, espmega.webServer);
+  
+  // Initialize iBeacon with unique UUID
+  ESP_LOGV("CUD IoT OS", "Initializing iBeacon");
+  esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+  esp_bt_controller_init(&bt_cfg);
+  esp_bt_controller_enable(ESP_BT_MODE_BLE);
+  esp_bluedroid_init();
+  esp_bluedroid_enable();
+  esp_ble_gap_register_callback(esp_gap_cb);
+  
+  // Generate unique UUID for this device
+  uint8_t uuid[16];
+  generate_unique_uuid(uuid);
+  
+  // Configure iBeacon with unique UUID
+  memcpy(vendor_config_custom.proximity_uuid, uuid, sizeof(uuid));
+  vendor_config_custom.major = ENDIAN_CHANGE_U16(ESP_MAJOR);
+  vendor_config_custom.minor = ENDIAN_CHANGE_U16(ESP_MINOR);
+  vendor_config_custom.measured_power = static_cast<int8_t>(0xC5);
+  
+  esp_ble_ibeacon_t ibeacon_adv_data;
+  esp_ble_config_ibeacon_data(&vendor_config_custom, &ibeacon_adv_data);
+  esp_ble_gap_config_adv_data_raw((uint8_t *)&ibeacon_adv_data, sizeof(ibeacon_adv_data));
+  
   #ifdef TAMPER_DETECTION
   espmega.display->registerPageChangeCallback(pageChangeCallback);
   espmega.display->registerTouchCallback(touchCallback);
@@ -156,6 +216,35 @@ void handle_mqtt_message(char *topic, char *payload)
   ESP_LOGD("CUD IoT OS", "MQTT Message Received: %s, %s", topic, payload);
 }
 
+static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
+{
+  esp_err_t err;
+
+  switch (event) {
+    case ESP_GAP_BLE_ADV_DATA_RAW_SET_COMPLETE_EVT: {
+      esp_ble_gap_start_advertising(&ble_adv_params);
+      break;
+    }
+    case ESP_GAP_BLE_ADV_START_COMPLETE_EVT:
+      // adv start complete event to indicate adv start successfully or failed
+      if ((err = param->adv_start_cmpl.status) != ESP_BT_STATUS_SUCCESS) {
+        ESP_LOGE("iBeacon", "Advertising start failed, error %s", esp_err_to_name(err));
+      } else {
+        ESP_LOGI("iBeacon", "Advertising start successfully");
+      }
+      break;
+    case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT:
+      if ((err = param->adv_stop_cmpl.status) != ESP_BT_STATUS_SUCCESS) {
+        ESP_LOGE("iBeacon", "Advertising stop failed, error %s", esp_err_to_name(err));
+      } else {
+        ESP_LOGI("iBeacon", "Advertising stop successfully");
+      }
+      break;
+    default:
+      break;
+  }
+}
+
 #ifdef TAMPER_DETECTION
 void pageChangeCallback(uint8_t page)
 {

src/main.hpp

@@ -14,6 +14,10 @@
 #include <ETH.h>
 #include <RemoteVariable.hpp>
 #include <ESPMegaDisplayOTA.hpp>
+#include <esp_gap_ble_api.h>
+#include <esp_bt_main.h>
+#include <esp_bt.h>
+#include <esp_ibeacon_api.hpp>
 #include "lcd_elements.hpp"
 #include "ir_codes.hpp"
 #include "display.hpp"
@@ -27,6 +31,7 @@ void loop();
 void send_stop_bytes(HardwareSerial &uart);
 void handle_input_change(uint8_t pin, bool state);
 void handle_mqtt_message(char *topic, char *payload);
+static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param);
 
 #ifdef TAMPER_DETECTION
 void pageChangeCallback(uint8_t page);