lora_msg_serializer.h

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#ifndef LORA_MSG_SERIALIZER_H
#define LORA_MSG_SERIALIZER_H
 
#include "esp_err.h"
#include "general/node_cfg.h"
#include "master/lora_msg_protocol.h"
 
#include <stdbool.h>
#include <stdint.h>
 
// ============================================================================
// LoRa Message Sizes (optimized for low bandwidth)
// ============================================================================
// Registration: 1 (type) + 1 (id) + 32 (name) + 4 (lon) + 4 (lat) = 42 bytes
#define LORA_REG_MSG_SIZE 42
 
// Periodic: 1 (type) + 1 (slave_count) + N * 3 (id + battery + moisture)
// Max: 1 + 1 + 16 * 3 = 50 bytes
#define LORA_PERIODIC_HEADER_SIZE 2
#define LORA_PERIODIC_SLAVE_SIZE  3
#define LORA_PERIODIC_MAX_SIZE    (LORA_PERIODIC_HEADER_SIZE + MAX_SLAVE_NUM * LORA_PERIODIC_SLAVE_SIZE)
 
// Alarm: 1 (type) + 1 (slave_id) = 2 bytes
#define LORA_ALARM_MSG_SIZE 2
 
// ============================================================================
// Serialization Functions
// ============================================================================
 
uint8_t lora_serialize_registration(uint8_t* buffer, uint8_t slave_id, const char* name, int32_t longitude,
                                    int32_t latitude);
 
uint8_t lora_serialize_periodic(uint8_t* buffer, const slave_data* slaves, uint8_t slave_count);
 
uint8_t lora_serialize_alarm(uint8_t* buffer, uint8_t slave_id);
 
// ============================================================================
// High-Level Send Functions
// ============================================================================
 
esp_err_t lora_send_registration(uint8_t slave_id, const char* name, int32_t longitude, int32_t latitude);
 
esp_err_t lora_send_periodic(const slave_data* slaves, uint8_t slave_count);
 
esp_err_t lora_send_alarm(uint8_t slave_id);
 
#endif // LORA_MSG_SERIALIZER_H