User guide

D2119 Dart RTLS User Guide 107
Appendix A: Information Data (I-packets)
Dart Hub provides output data stream that are available on TCP port 5117. The data from the
dart hub is coded in ASCII and sent over the LAN interface. To retrieve tag data from the hub,
you need a client program using the TCP communication protocol and a connection to the
output port. I packets are ‘Information’ packets that provide additional information about tag
actions or sensor, like when tag is turned on/off, tag enters a WherePort field, sensor statistics
etc.
I packet data is available on subscription only and client program needs to subscribe to it upon
establishing a connection. I packet are provided in 2 different formats – Tag ‘I’ packet format
that gives information about tag actions, and Receiver ‘I’ packet format, that gives information
about receiver statistics. Receiver I packet provides statistics for each active receiver
continuously on a 60 second interval.
Tag ‘I’ packet format:
Format of tag information packet is as follows:
I,TagID,tagStatus,rate,battery,info,timestamp,evt_id,evt_msg
TagID - Tag ID
tagStatus - tag on/off state: 0: off; 1: on; 2: unknown
rate - tag blink rate in Hz
battery - tag battery report
info - event specific information
timestamp - timestamp of reporting time
evt_id - event type ID
evt_msg - event message
Example:
I,00200E8F,1,2.00,12,0,1435161191.102,3,‘DartWand changed tag blink rate‘
Tag ‘I’ packet table: