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Aquaread BlackBox™ Instruction Manual
10401-00618 Rev P
8.1.15.
Send Data
This command is used by the data recorder to retrieve the measurement values after a
measurement has been completed.
Command
Response
<a>D<sequence-nr>! <a><values>[<crc>]<CR><LF>
<sequence-nr> is a single digit (“0”-”9”) indicating the data packet number being
requested
<values> is a string of measurement results, each consisting of a sign character
(“+” or “-”), 1-7 digits and an optional decimal point
the <crc> field will be present if measurement with CRC was requested, and is a 3
byte string containing the encoded CRC of the response packet
The maximum size of the <values> field is 75 characters when following a concurrent
measurement request, or 35 characters when following a non-concurrent measurement
request.
8.1.16.
Continuous Measurements
This command is used by the data recorder to retrieve measurements immediately without
a separate Start Measurement command.
Command
Response
<a>R<set>!
<a><values><CR><LF>
<set> is a digit (“1”-”9”) indicating which set of measurements is being requested
<values> is a string of measurement results, each consisting of a sign character
(“+” or “-”), 1-7 digits and an optional decimal point
The maximum size of the <values> field is 75 characters.
8.1.17.
Continuous Measurements and Request CRC
This command is used by the data recorder to retrieve measurements immediately without
a separate Start Measurement command.
Command
Response
<a>RC<set>!
<a><values><crc><CR><LF>
<set> is a digit (“1”-”9”) indicating which set of measurements is being requested
<values> is a string of measurement results, each consisting of a sign character
(“+” or “-”), 1-7 digits and an optional decimal point
<crc> is a 3 byte string containing the encoded CRC of the response packet
The maximum size of the <values> field is 75 characters.
8.2. BlackBox Address
The BlackBox stores an SDI-12 sensor address in its EEPROM. The sensor address is a
single character from the set “0”-”9”, “A”-”Z” & “a-”z”. With the exception of the Address
Query command, the BlackBox will only respond to commands beginning with its sensor
address.
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