User's Manual

23
4.2 Payload Data Description
Offset
Size (Bytes)
Description
0
1
Payload Protocol Version
1
4
Timestamp; UNIX Epoch Offset
5
4
GPS Latitude
9
4
GPS Longitude
13
2
Accelerometer X acceleration vector
15
2
Accelerometer Y acceleration vector
17
2
Accelerometer Z acceleration vector
19
2
Temperature; tenths degrees F,C? (multiplied by 10)
21
2
Light, Lux
23
6
Highest RSSI Wi-Fi AP BSSID
29
6
2
nd
Highest RSSI Wi-Fi AP BSSID
35
6
3
rd
Highest RSSI Wi-Fi AP BSSID
41
6
4
th
Highest RSSI Wi-Fi AP BSSID
Highlighted fields are optional. When all of the Message Fragments are collected by the server and assembled
in order the server will have the total Message Size. 23 Bytes for no APs, 29 Bytes for 1 AP, 35 Bytes for 2 APs,
41 Bytes for 3 APs and 47 Bytes for 4 APs. Additional APs if required can be concatenated and determined
server-side based on ((Message Size – 23 Bytes) / 6 Bytes) == Number of APs at the end of the payload.
Any additional changes to the defined payload (Bytes 0 – 22) will cause an increment of the Payload Protocol
Version.