- 34 - Handheld Ultrasonic Flowmeter
6.5Communication Protocol
The protocol is comprised of a set of basic commands that are strings in ASCII format, ending with
a carriage (CR) and line feed (LF). Commonly used commands are listed in the following table.
Command Function
Data
Format
DQD(CR)
Return flow rate per day
±
d.ddddddE
±
dd
DQH(CR)
Return flow rate per hour
±
d.ddddddE
±
dd (CR)
（
LF
）
DQM(CR)
Return flow rate per minute
±
d.ddddddE
±
dd (CR)
（
LF
）
DQS(CR)
Return flow rate per second
±
d.ddddddE
±
dd (CR)
（
LF
）
DV(CR)
Return instantaneous flow velocity
±
d.ddddddE
±
dd (CR)
（
LF
）
DI+(CR)
Return POS totalizer
±
dddddddE
±
d
DI-(CR)
Return NEG totalizer
±
dddddddE
±
d (CR)
（
LF
）
DIN(CR)
Return NET totalizer
±
dddddddE
±
d (CR)
（
LF
）
DID(CR)
Return Identification Number (IDN)
ddddd (CR)
（
LF
）
DL(CR)
Return signal strength and signal quality
S=ddd,ddd Q=dd (CR)(LF)
DT(CR)
Return the current date and time
yy-mm-ddhh:mm:ss (CR)(LF)
M@(CR)
***
Send a key value as if a key is pressed
LCD(CR)
Return the current display contents
FOdddd(CR)
Force the FO output to output a frequency
of dddd Hz
ESN(CR)
Return the ESN of the flowmeter
Dddddddd (CR)(LF)
RING(CR)
Handshaking Request from a MODEM
OK(CR)
Acknowledgement from a MODEM
No action
GA
Command for GSM messaging
Please contact the manufacturer
for detail
GB
Command for GSM messaging
GC
Command for GSM messaging
DUMP(CR)
Return the print buffer content
In ASCII string format
DUMP0(CR)
Clear the whole print buffer
In ASCII string format
DUMP1(CR)
Return the whole print buffer content
In ASCII string Format, 24KB
in length
Ｗ
Prefix of an IDN-addressing-based
networking command. The IDN address is
a word, ranging 0-65534.
N
Prefix of an IDN-addressing-based
networking command. The IDN address
here is a single byte value, ranging 00-255.
Not recommend for use.
P
Prefix of any command with checksum
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