sntp_component.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/components/time/real_time_clock.h"
#include <array>
 
namespace esphome {
namespace sntp {
 
// Server count is calculated at compile time by Python codegen
// SNTP_SERVER_COUNT will always be defined
 
class SNTPComponent : public time::RealTimeClock {
 public:
  SNTPComponent(const std::array<const char *, SNTP_SERVER_COUNT> &servers) : servers_(servers) {}
 
  void setup() override;
  void dump_config() override;
  float get_setup_priority() const override { return setup_priority::BEFORE_CONNECTION; }
 
  void update() override;
  void loop() override;
 
  void time_synced();
 
 protected:
  // Store const char pointers to string literals
  // ESP8266: strings in rodata (RAM), but avoids std::string overhead (~24 bytes each)
  // Other platforms: strings in flash
  std::array<const char *, SNTP_SERVER_COUNT> servers_;
  bool has_time_{false};
 
#if defined(USE_ESP32)
 private:
  static SNTPComponent *instance;
#endif
};
 
}  // namespace sntp
}  // namespace esphome