28
tells the measurement interval in minutes, or the
amount of time between readings of this
measurement.
Measurement
Data
3 for each
sensor
reading
Sensor data encoded 6 bit binary.
Additional
Measurements
Variable
If more than one measurement was setup for
transmission, more data will follow. Each
measurement setup will have data starting with the
Measurement Delimiter and ending with
Measurement Data.
Final
Delimiter
1
This byte is always “.” and it is used to denote the
end of all measurement data.
Battery
voltage
1
This is the battery voltage measured prior to
making the transmission. The range of the number
will be -32 to +31 and can be converted to volts by
multiplying by 0.234 and adding 10.6 allowing a
range of 3.1 to 18.1 volts.
Example Pseudobinary-C message:
C3+ADGTU?///+BDGTU?@UI+CDGTU??~v///.L
Group
3 format C
Sequence
A
1
Julian Day
DG
263
Time
TU
21:41
Interval
?
00:-1
Data:
/// missing
Sequence
B
2
Julian Day
DG
263
Time
TU
21:41
Interval
?
00:-1
Data:
@UI 1353
Sequence
C
3
Julian Day
DG
263
Time
TU
21:41
Interval
?
00:-1
Data:
?~v -74
/// missing
Batt V
L
13.4
Pseudobinary-D Format
This is another compact data format. It differs from Pseudobinary B in that it has a timestamp at
the start of the message. The timestamp indicates when the transmission should have taken place
and helps decode when the data was collected. Pseudobinary D is 4 bytes larger than format B.
