User`s guide

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7. Read / Interpret Sensor Data
The actual data delivered by the sensor can be quickly read by
scanning the Fast Read Registers (FRR). The purpose of these
registers is to allow for efficient access to the remote wireless
device’s most current data.
Any write to the first address in the FRR will zero out the latest
measurement and time. Sensors may be set to report data in ten
second intervals out of the box, but typically should be at
10 minute intervals by default.
The following table represents the gateway’s FRR:
RAW FORMULA = 1000 + (7 * SLOT)
FC FORMULA = 41001 + (7 * SLOT)
SLOT = {0 – 49}
Example:
Record Name Address Record Name Address
FRR [0] FC 41001,
Raw 1000
FRR [49] FC 41344,
Raw 1343
These records consist of seven (7) registers per wireless device.
The format of these records are:
Name Offset Description
AGE 0 time in seconds when the wireless device
generated this data.
DATA_0,
DATA_1,
DATA_2,
DATA_3
1, 2, 3, 4 Data is generated by wireless device.
The format for this data can be found in the
Monnit Serial MOD-BUS Sensor Application
Definition document
Battery 5 register value / 100 = x.xx Volts
RSSI 6 a negative number from -20 to -110 dBm
Note: Data field size is Int16. Data_L is Data_0 and Data_H is Data_1
when the sensor data is an Int32. Data in the FRR zeroes out automatically
after a period of inactivity from the sensor.