User guide

Appendix D: Hub Health Monitoring
D2119 Dart RTLS User Guide 127
Appendix D: Hub Health Monitoring
This section contains details of the health monitor module inside the Dart RTLS hub. Health
monitor is a new feature inside hub RTLS firmware that latches the health of the Dart RTLS
system and sends out D packets when there is a change in the health status.
Health monitor represents Dart RTLS system in three health states: good(green),
warning(yellow) and error(Red) and corresponding state machine is as follows:
GOOD
WARNING
ERROR
Dart RTLS System Health Monitor States
Error Conditions
Warning Conditions
Health State
Change
D-packet
 Unknown Rx Detected
 Rx 00 Detected
 Ref tag battery low
 Rx Fw Upgrade
 Rx FW mismatch
 Rx cannot see ref tag
 No Rx Detected
 No ref tag enabled
 No VG enabled
 No Rx detected
 No Rx activated
 CPU temp high
 Hub Failure
 Ref pair broken
 Enabled Rx not detected
 Rx communication lost
 Ref tag not found
 Ref tag lost
 Ref tag suspension fail
 Rx lost referencing
Health Status Parameters
Health monitoring uses a set of parameters to describe the health status of Dart RTLS system
at any time, and the set of parameters are:
Current_Health_State - current health state of a Dart RTLS system. It has three
values: 0 (green), 1 (yellow) and 2 (red).
Latched_Health_State - the worst health state a Dart RTLS system has experienced since
firmware restart. It also has three values: 0 (green), 1 (yellow) and 2 (red).
Outstanding_Error_Types – types of current outstanding errors at a Dart RTLS system. It
is a bit-wise value with each bit defined as follows: