State
Operation
LED
LED meaning
Active
1. system charging for operations
2. perform distance measurement
3 uplink payload transmission (Rx1)
4. downlink payload receival slot (Rx2)
GREEN (3 blinks)
BLUE (3 blinks)
Currently in active state
Uplink transmission
Sleep
Device is in battery-saving mode for 2min
(equivalent to being turned OFF)
Not available
After 15 uplink transmissions, the device will automatically enter sleep mode (exiting the
autotest mode). When in autotest mode, the power is supplied by the onboard battery.
Sleep mode (3), Active mode (4)
Sleep mode is the battery saving mode, allowing the device to achieve years of autonomy.
The Terabee device will be in sleep mode for most of its time while deployed on the field.
Based on pre-configured parameters, the Terabee device will wake up (exit) from the sleep
mode and enter the active mode for a short period of time. During active mode, the
Terabee device will:
1. Perform system charging for operations
2. Perform a distance measurement
3. Execute an uplink message transmission via LoRa to the configured network (Rx1)
4. Open slot for downlink messages (Rx2).
After the sequence is completed, the device will go back to sleep mode, until the next
wake-up is scheduled. The LED indication is not used during sleep nor active mode, in
order to preserve battery lifetime.
Please note that during active mode, distance measurements and data
transmission always happen in the same “wake up window”.
Copyright © Terabee 2021
Terabee, 90 Rue Henri Fabre
01630, St Genis-Pouilly, France (next to CERN)
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