Lambrecht rain[e]H3, User Manual

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User Manual
Precipitation Sensor rain[e]H3 with Ethernet
Id-No. 00.15184.540 020
rain[e]H3 Precipitation Sensor Manual
10 In- and Outputs
10.1 SDI-12 Interface
Communication using the SDI-12 protocol via the SDI-12 interface is based on the ‘SDI-12 A Serial-Digital
Interface Standard for Microprocessor-Based Sensors, Version 1.3, 2012’. The rain[e]H3 can be used in bus
mode parallel to other rain[e]H3 sensors.
The following subset of SDI-12 commands are implemented in the rain[e]H3 .
For further details to the SDI-12 protocol we recommend the afore mentioned standard document or the web
page www.SDI-12.org.
Implemented SDI-12 commands:
Command Function Answer of the sensor
a! Acknowledge Active a<CR><LF>
?! Address Query Command a<CR><LF>
a I ! Send Identification allccccccccmmmmmmvvvxx...xx<CR><LF>
aAb! Change Address b<CR><LF>
aM! Start Measurement atttn<CR><LF>
aMC! Start Measurement and Request CRC atttn<CR><LF>
aC! Start Concurrent Measurement atttnn<CR><LF>
aCC! Start Concurrent Measurement and Request
CRC checksum
atttnn<CR><LF>
aD0!
aD1!
Send Data (Puffer 0)
Send Data (Puffer 1)
a<values<CR><LF>
a<values><CRC><CR><LF>
resp. with CRC checksum
aM1! Generate Variance atttn<CR><LF>
aM2! Generate Heating Data atttn<CR><LF>
aM3!
Start Intensity Measurement Average Value,
Maximum and Minimum
atttn<CR><LF>
aMC1! Generate Variance and Request CRC atttn<CR><LF>
aMC2! Generate Heating Data and Request CRC atttn<CR><LF>
aMC3! Start Intensity Measurement Average Value,
Maximum and Minimum and Request CRC
atttn<CR><LF>
aC1! Generate Variance atttnn<CR><LF>
aC2! Generate Heating Data atttnn<CR><LF>
aC3! Start Intensity Measurement Average Value,
Maximum and Minimum
atttnn<CR><LF>
aCC1! Generate Variance and Request CRC atttnn<CR><LF>
aCC2! Generate Heating Data and Request CRC atttnn<CR><LF>
aCC3! Start Intensity Measurement Average Value,
Maximum and Minimum and Request CRC
atttnn<CR><LF>
aV! Start Verification atttn<CR><LF>
a = address of the respective sensor; standard sensor address = 0
SDI-12 commands always start with the address of the appropriate sensor. Therefore all other sensors on the
same bus will ignore these commands. SDI-12 commands end with ‘ ! ’. All answers from sensors start with its
address, too, but end with the ASCII characters ‘Carriage Return’ <CR> and ‘Line Feed’ <LF> .
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