LoRa IoT Smart Room Sensor User Guide
T0006338_UG
Version 1.5
TEKTELIC Communications Inc.
Page 12 of 30
Actuation distance at least 15 mm
External Connection
Designed to connect to an open-drain output 1.8 V compliant
input with pull-up
Input pulse frequency <= 20 Hz
Remote Temperature Sense
A remote temperature probe
(thermistor)―
recommended
10-
kΩ―
can be connected to External Connector
Measurement range:
-55
°C‒
125°C (CWF3AA103G3380)
-
25°C‒105°C (
NTCAIMME3)
1.3.1
Temperature and Relative Humidity Transducer
The Room Sensor models contain a Temperature and Relative Humidity Transducer. Details on
the transducer range and accuracy are listed in Table 1-3. Note that because the transducer
element is located inside the Sensor housing sense response time will not be immediate. An
opening in the top cover surface directly over the transducer is designed to allow ambient air to
contact the transducer. Response time can be reduced by forcing air to move over the Sensor in
the region of the transducer opening. MCU temperature is also reported. This is a less accurate
temperature measurement using a transducer located in the Room Sensor microprocessor.
The Sensor can be configured to report temperature and RH values or to report alarms based
on a customer configured normal operating window. High and low alarm points can be set
individually for temperature, humidity and MCU temperature. The sample rate for checking the
transducers is user configurable with different sample rates settable if the measured value is
inside or outside the normal operating window.
1.3.2
Acceleration Transducer
The Acceleration sensing is provided by an integrated 6-axis accelerometer, which can be
disabled to conserve battery life. The Room Sensor supports two independent interrupt-based
accelerometer events with configurable thresholds: acceleration event and impact alarm event.
The acceleration event is based on exceeding an acceleration threshold. The accelerometer is
disabled for a configurable debounce time after an acceleration event such that there will not
be multiple reports for a single event. The impact alarm event is raised when an impact alarm
threshold is exceeded for a configurable number of times within a configurable period. The
impact alarm is cleared after a grace period of no impact alarms. Both acceleration and impact
alarm functions can be independently disabled or enabled.
