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2.3.5.
Occupancy Mode and Messages
The occupancy mode sends an uplink message at the start and end of a state. In
Occupancy Modes, a debounce timer counts down from a preconfigured occupancy
duration and if no state change is detected past the occupancy duration, then the device
identifies the state that has changed.
For example, if the occupancy duration is set at 10 secs, then the device will only change
state after it detects the same state for longer than 10 secs. This mode can be used with
the 2 wire accessory to connect to pressure sensors to detect the state of a seat
(occupied/vacant).
The uplink message for Occupancy mode contains the following data:
● Message type: Occupancy
● Sequence number: counter from 0 to 4095
● Sensor status: status of external I/O connector configured as Pulse or Edge mode
2.3.6.
Occupancy + Heartbeat Mode and Messages
The Occupancy + Heartbeat mode sends an uplink message at the start and end of a state,
and sends a heartbeat message at an interval configured on the UnaConnect platform.
The uplink message for Occupancy + Heartbeat mode contains the following data:
● Message type: Occupancy + Heartbeat
● Sequence number: counter from 0 to 4095
● Battery voltage: remaining voltage measured in mV
● Sensor status: status of external I/O connector configured as Pulse or Edge mode
UnaBell LTE-M User Manual
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