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Kona Home Sensor TRM T0005370_TRM Version Rev-C 1.0
TEKTELIC Communications Inc. Confidential Page 32 of 34
dry measurement baseline. The Threshold is tunable to allow the customer to set the desired
sensitivity level. However, note that changing the threshold may desensitize the Moisture
transducer or increase the likelihood of a false positive.
Any value less than 50 for the Threshold is ignored.
3.4.7.3 Enable/Disable
The Enable/Disable register sets whether the Moisture transducer is initialized (enabled) or de-
initialized (disabled). This register is used to determine the default state of the Moisture
transducer when first powered on. The possible values are:
•
0: Disable
•
1: Enable
3.4.7.4 Calibrate Baseline
Writing a non-zero value to this register forces the transducer to re-calibrate the dry baseline to
the current value regardless of its actual state (wet or dry). It is recommended that this
command is run when a Home Sensor is first deployed or relocated to ensure that the baseline
is correctly set for the material under the Home Sensor.
Note: The moisture detector is automatically recalibrated for a new dryness baseline whenever
the transducer is enabled (see also Section 3.4.7.3).
3.4.7.5 Default Configuration
Table 3-17 shows the default values for the Moisture transducer configuration registers.
Table 3-17: Default Values of Moisture Transducer Configuration Registers
Sample Period 2 (32 seconds)
Threshold 100
Enable/Disable Disabled (De-initialized)
3.4.7.6 Example DL Messages
In the following example payloads, the Command Field is boldfaced:
•
Set the Sample Period to 64 seconds and read the Threshold
o
DL payload: { 0x DA 03 5B }
•
Force the transducer to calibrate as being dry
o
DL payload: { 0x DD 01 }