...

{
  "message_type": "status_change",
  "message_trace_id": "{message_trace_id}",
  "occupied": "{"occupied" if parsed["occupation_status"] is True else "free"}",
  "parking_session_iterator": {parsed["parking_session_iterator"]},
  "previous_status_duration_min": {parsed["previous_occupancy_status_duration_min"]},
  "device_id": "{device_id}",
  "position":{
      "network_id": "{network_id}",
      "custom_id": "{custom_id}",
      "latitude": {latitude},
      "longitude": {longitude},
      "group_inner_id": {group_inner_id},
      "group":{
          "id": {group_id},
          "name": "{group_name}",
          "zone_id": {zone_id}
      }
  }
}

...

{
   "message_type":"status_change",
   "message_trace_id":"5443685e-e8d9-410f-bcee-d2d82c2e8473",
   "occupied":"free",
   "parking_session_iterator":5,
   "previous_status_duration_min":16,
   "device_id":"1E554",
   "position":{
      "network_id":"00000000-0000-0000-0000-00000001e554",
      "custom_id":"",
      "latitude":51.49442797732277,
      "longitude":-0.1280093119192549,
      "group_inner_id":1,
      "group":{
         "id":4121,
         "name":"Test Group Delete After 26/02/2021",
         "zone_id":2779
      }
   }
}

• message_trace_id - system message-id;

• occupied - parking occupancy status ("occupied" or "free");

• parking_session_iterator - short serial number of parking session. Iterator (number) is incrementing when new parking session starts (0-7);

• previous_status_duration_min - duration of previous sensor status;

Heartbeat

The message is sent to confirm the health status of a sensor every 3 hours in case of unchanged occupancy status.

...

• message_trace_id - system message-id;

• position_network_id - parking space network address;

• heartbeat_number - the value increases for every following heartbeat during single occupancy state (0-11);

• status - parking occupancy status ("occupied" or "free");

• session_iterator - short number of parking session. Iterator is incrementing when parking session starts (0-7);

• latitude, longitude - GPS coordinates;

• level - used for multi-level parking (0 for ground level parking);

• zone_id - id of a device zone;

• group_id - id of a parking bay;

• group_name - name of a position group;

• group_inner_id - a device number inside of a parking bay;

• custom_id - a property "custom_id" of a position.

{
  "timestamp": "{iso8601(message_time)}",
  "message_type": "heartbeat",
  "message_trace_id": "{message_trace_id}",
  "message":
  {
    "position_network_id": "{network_id}",
    "heartbeat_number": {parsed["heartbeat_message_counter"]},
    "status": "{"occupied" if parsed["occupation_status"] is True else "free"}",
    "session_iterator": {parsed["parking_session_iterator"]},
  },
  "location":
   {
     "latitude": {latitude},
     "longitude": {longitude},
     "level": {level}
   },
  "grouping":
   {
     "zone_id": {zone_id},
     "group_id": {group_id},
     "group_name": "{group_name}",
     "group_inner_id": {group_inner_id},
     "custom_id": "{custom_id}"
   }
}

...