Send long char array (7000) via hardware serial

Projects Programming
13 
typedef struct {
      unsigned long timestamp; // Timestamp when the event was generated
      int reason; // The reason why the event was added
      int state; // The LED state, wake, sleep etc.
      unsigned long rotations; // Number of rotations the wheel has done
      unsigned int on_time; // Number of seconds the device has been awake
      unsigned int half_on_time; // Number of seconds the lights have been half on
      unsigned int full_on_time; // Number of seconds the lights have been fully on
      float voltage; // The battery voltage
      unsigned int messages_sent; // The number of messages the device has sent
      unsigned int messages_failed; // The number of messages that were attempted but failed
      float temperature; // The temperature
      int moving; // Whether we're moving
      unsigned int event_number; // The event number
      
      double lat; // Current latitude
      double lng; // Current longitude
      unsigned int sats; // Number of satelites involved
      unsigned int age; // Milliseconds since last fix
} Events;

This looks like data for ONE event, not for multiple events Why does the struct have a plural name?

char post_data[7000];// = "1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&1234567890123456789012345678901234567890abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz&";
Lose the stupid comment.

  if (asyncbee.getStep() == 12) {
    asyncbee.addPOSTdata(post_data);

You haven't written anything to post_data. Passing an empty array to the method seems pointless.