Enhance DaliCloudBridge: add support for LTE UART transport and extend configuration options

Signed-off-by: Tony <tonylu@tony-cloud.com>

include/gateway_cloud.hpp

@@ -4,10 +4,14 @@
 #include "dali_comm.hpp"
 
 #include <atomic>
+#include <functional>
 #include <string>
+#include <vector>
 
 #ifdef ESP_PLATFORM
 #include "esp_event_base.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
 #include "mqtt_client.h"
 #endif
 
@@ -17,22 +21,35 @@ struct GatewayCloudConfig {
   std::string username = "device";
   std::string password;
   std::string topicPrefix = "devices";
+  std::string cemiTransport = "mqtt";
+  bool lteUartEnabled = false;
+  int lteUartPort = -1;
+  int lteTxPin = -1;
+  int lteRxPin = -1;
+  int lteBaudrate = 115200;
+  int lteRxBufferSize = 2048;
+  int lteTxBufferSize = 2048;
   int qos = 1;
 };
 
 // DaliCloudBridge bridges MQTT cloud topics and local DALI frames.
 class DaliCloudBridge {
  public:
+  using CemiDownlinkHandler = std::function<bool(const uint8_t* data, size_t len)>;
+
   explicit DaliCloudBridge(DaliComm& comm);
 
   bool start(const GatewayCloudConfig& config);
   void stop();
   bool isConnected() const;
+  bool lteUartActive() const;
   DaliBridgeEngine& bridge() { return bridge_; }
   const DaliBridgeEngine& bridge() const { return bridge_; }
+  void setCemiDownlinkHandler(CemiDownlinkHandler handler);
 
   bool publishStatus(const std::string& status);
   bool publishRegister(const std::string& payloadJson);
+  bool publishCemiFrame(const uint8_t* data, size_t len);
 
  private:
 #ifdef ESP_PLATFORM
@@ -44,19 +61,34 @@ class DaliCloudBridge {
 #endif
 
   bool handleDownlink(const std::string& payload);
+  bool handleCemiDownlink(const uint8_t* payload, size_t len);
   bool publishJSON(const std::string& topic, const std::string& payloadJson);
+  bool publishBytes(const std::string& topic, const uint8_t* data, size_t len, int qos);
+  bool startLteUart();
+  void stopLteUart();
+  bool publishLteUartBytes(const uint8_t* data, size_t len);
+  void lteUartLoop();
 
   std::string topicDown() const;
   std::string topicUp() const;
   std::string topicStatus() const;
   std::string topicRegister() const;
+  std::string topicCemiDown() const;
+  std::string topicCemiUp() const;
+  std::string topicCemiStatus() const;
 
   DaliComm& comm_;
   DaliBridgeEngine bridge_;
   GatewayCloudConfig config_;
+  CemiDownlinkHandler cemi_downlink_handler_;
   std::atomic<bool> connected_{false};
+  std::atomic<bool> lte_uart_started_{false};
+  std::atomic<bool> lte_uart_stop_requested_{false};
+  std::atomic<uint32_t> cemi_sequence_{0};
 
 #ifdef ESP_PLATFORM
+  static void lteUartTaskEntry(void* arg);
   esp_mqtt_client_handle_t client_ = nullptr;
+  TaskHandle_t lte_uart_task_ = nullptr;
 #endif
 };