IEEE Consumer Electronics Magazine - November/December 2021 - 86

Special Section on Advances in Smart Cities
Figure 4. Client end physical setup.
character, meter serial number, meter degree,
terminal character. Finally, all meter data are
packeted to the cloud servo with the 4G wireless
network. For water data collection, the up is
sleep initially, which waits for the request from
the servo. When receiving the command, the up
controls the ith meter power ON and reads its
metering data, then storing to registers. Until all
meters are read, the data would be sent to the
cloud servo.
The physical setup of hardware at the client
Figure 3. Flowchart of microcontrol receiving
program at servo.
value into the form of character. When all meter
data are completely transmitted, the meter data
are collected and stored on the memory. These
readings will be sent to the control center at the
servo end with the TCP packet transmission.
SYSTEM ESTABLISHMENT AND
EXPERIMENTS
The water management system is implemented
with codesign of hardware and software.
At the user end, if there are N water meters, the
values of meters can be automatically read to
the microprocessor (up) with one-by-one
through Nserial ports. Each water meter has the
specified serial number. The entire data frame is
as follows by the order of sequence: inital
86
end is shown as Figure 4 including GSM/4G and
antenna module, data collector, and smart water
meter.8 The serial transmission port and baud
rate are set first. When the client connection is
ON, it will show the date and time of connection
and returned water-metering data on real time.
Then, the meter data are processed with software
management at the control center. The
software management for automatic meter reading
system is developed at the servo control center.
The date, time, the degree of water meter
and its user number will be recorded on database.
It is noticed that the transmitted data
maybe not correct because of the communication
error or meter sensing error. In order to

IEEE Consumer Electronics Magazine - November/December 2021

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