ADS-270 User Guide
16
4.5 Data Acquisition Parameters
4.5.1 Sampling delay (Warm up time)
The parameter defines an idle period between switching on the excitation and reading
the measurements from the analog and the SDI-12 channels. This option should be
set according to the transducer with the longest warm up time for stable reading.
The
value of this parameter affects strongly the battery life.
1291,d
d: 0-255 sec
4.5.2 Message transmission period
The parameter defines the message transmission period to the LoRaWAN network.
The period should be set according to the number of channels selected for
acquisition. Every message contains one channel. The minimum value is 1 minute.
The value of this parameter affects strongly the battery life.
1292,p
p: 1-255 min
4.6 Message Format
The message is in ASCII format and has a fixed length of 12 byte.
L1
L0
D9
D8
D7
D6
D5
D4
D3
D2
D1
IN
L0, L1
: 0-F, HEX, Channel Number
D1-D9
: Measurement value
D9
: +/-, Sign
D1-D8
: Value, can contain a decimal point
IN
: 0-1, Digital Input value
Channel numbers:
01
: Analog input value, AI1
15 , 16, 17, 18, 19, 1A, 1B, 1C
: SDI-12 Channels 1-8
5B
: Counter value
AB, AC, AD, AE, AF, B0, B1, B2
: MODBUS Channels 1-8
IN: Digital Input value
: 1: ON, 0: OFF
Examples:
AI1 has the value of -16.7, Digital input is ON.
The Message contents is: 01-000016.71
SDI-12 Channel 7 has the value of 23.3440, Digital input is ON.
The Message contents is: 1B+023.34401
MODBUS Channel 2 has the value of 48546, Digital input is OFF.
The Message contents is: AC+000485460
