added esphome component and hmi file

components/nextion_custom/nextion_custom.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#ifdef USE_ESP32_FRAMEWORK_ARDUINO
+
+#include <utility>
+
+#include "esphome/components/text_sensor/text_sensor.h"
+#include "esphome/components/switch/switch.h"
+//#include "esphome/components/time/real_time_clock.h"
+#include "esphome/components/uart/uart.h"
+#include "esphome/core/automation.h"
+#include "esphome/core/component.h"
+#include "esphome/core/defines.h"
+
+namespace esphome {
+namespace NextionCustom {
+
+class NextionCustom : public Component, public uart::UARTDevice {
+ public:
+  void setup() override;
+  void loop() override;
+
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+  void dump_config() override;
+
+  void send_custom_command(const std::string &command);
+  
+  
+  void send_special_hex_cmd(const std::string &command);
+
+  void add_incoming_msg_callback(std::function<void(std::string)> callback);
+
+  void send_command_(const std::string &command);
+
+
+ protected:
+  static uint16_t crc16(const uint8_t *data, uint16_t len);
+
+  bool process_data_();
+  void process_command_(const std::string &message);
+
+  CallbackManager<void(std::string)> incoming_msg_callback_;
+
+  std::vector<uint8_t> buffer_;
+};
+
+
+}  // namespace NextionCustom
+}  // namespace esphome
+
+#endif  // USE_ESP32_FRAMEWORK_ARDUINO