User's Manual

MAINTENANCE FUNCTIONS
Troubleshooting
SKF Enlight Collect IMx-1 System
User Manual
Revision C
63 (92)
Figure 40 Sensor radio interactions and flow – all conditions
Start point for the flow described in the figure above, is a sensor in flight mode. An
NFC tap from the phone/app will take the sensor out of flight mode and activate its
WPAN radio, so the sensor is discoverable by the app using the phone’s Bluetooth
radio.
• At this stage a further NFC tap would have no consequence.
• If the app doesn’t connect to the sensor via Bluetooth then after a few
minutes the sensor will revert to flight mode.
For a new sensor being commissioned, the app will normally then connect via
Bluetooth, configure it and instruct it to switch to its mesh radio. If this process
doesn’t complete properly, the following apply:
• Having connected, if the app communications aren’t properly closed or are
not maintained, after 10-minutes of inactivity the sensor will revert to flight
mode.
• Similarly, once connected, a second tap will also return the sensor to flight
mode.
With the mesh identity configured and mesh radio activated, the sensor will attempt
to join the mesh. The mesh active state may also be resumed if for some reason
mesh connectivity is subsequently lost. This is shown by the dotted, ‘return’ line.
• Note that in the mesh active state, the mesh radio will be deactivated if after
5-minutes it hasn’t successfully joined the mesh. This initial deactivation or
sleep period lasts for 5-minutes but after subsequent failures it increases in
coarse steps from 10 minutes up to 24 hours between mesh connection
attempts.
An NFC tap on a sensor with its mesh radio enabled, joined, active or ‘sleep’ state,
switches it back to WPAN radio, active mode.
• An NFC tap on a sensor will wake it from a ‘sleep’ state and show in app a
commissioned sensor’s location in the hierarchy. Note that an NFC tap on a
commissioned sensor temporarily takes it out of the mesh. The app knows
from the sensor what mode it was in before the app connected and unless
commissioning or decommissioning, will always set it back into that mode
when disconnecting.
With WPAN active again, a command can return the sensor to flight mode.
• This is part of the process of sensor decommissioning, where the app clears
the sensor of its configuration, before then instructing it to adopt flight mode.