User's Guide
Gen2 BLE Sensor Family User Guide T0007796_UG_Portable Version 0.2
TEKTELIC Communications Inc. Page 25 of 30
b. If the red LoRa LED blinks, then one of the health checks failed. Consider
replacing the battery, or moving the sensor to an environment within
temperature range.
3. Immediately after the boot pattern, the join procedure will begin. During this time the
green system LED will blink continuously until the sensor has joined a network.
4. The red LoRa LED will now blink whenever LoRa activity occurs on the sensor
(transmitting or receiving packets, including the join request packets).
During normal operation,
The red LoRa LED will blink whenever LoRa activity occurs on the sensor (transmitting or
receiving packets), and
The green system LED can be controlled via the downlink command interface.
NOTE: Any other LED pattern behaviour not described above most likely indicates a low
battery. For example, if steps 1-2 repeat continuously, the battery no longer has enough charge
to power the join procedure.
3.4 Reset Function
Each Gen2 sensor variant is capable of a physically-triggered reset. This type of reset powers
down the MCU and restarts it, causing the network join procedure to begin again.
For all AA-cell variants, there is an externally-accessible function button on the device, that can
be pushed by a pin, such as a paper clip (see Figure 1-4). The button should not be pushed hard.
For all C-cell variants, the reset is triggered by applying the magnetic pattern as shown in Figure
2-1. While this pattern causes the sensor to wake from deep sleep before activation, during
normal operation this pattern causes a reset.
NOTE: Shutting down or resetting the sensor will cause all unsaved user configurations to be
lost. Save the desired configuration to the sensor flash before powering off or resetting.
3.5 Function Button
The Contact Tracing Devices and SafeAlerts have an externally-accessible function button
located on the bottom of the enclosure. The button is actuated by pushing. Different push
patterns can cause different behaviour, depending on the functional type of the sensor. Refer