This document describes a radio frequency-based water distribution data acquisition system that aims to remotely read water meters from a central location in real-time using wireless technology. The system uses microcontroller-based central office and home units connected via a radio frequency modem to automatically read water usage data from water meters equipped with reed switches and update consumption information without manual readings. This allows for more efficient water distribution management and fraud prevention by paying users based on actual water consumed.

1. RADIO FREQUENCY BASED WATER
DISTRIBUTION DATA ACQUISITION
SYSTEM

2. Objective
• To use wireless technology.
• To make use in real time applications.
• To make use of the resource efficiently.

3. Abstract
 Reading of several water meters from one central location.
 Radio frequency used as wireless medium.
 Manual error in meter reading and price calculation.
 Efficiency of water distribution and control the fraudulent intake b
the end user.
 Pay for volume of water consumed.

4. Existing method
 Hydrosense technology.
 Used in hotels.
 Fixed in the showers.

5. Typical System
Central
Office CU
RF wireless
network
HU
HU
HU
HU
HU
HU
HU
HU
HU

6. Tools
• Microcontroller based electronic units (Central office
unit and home unit)
• Radio Frequency Modem
• Water meter with reed switch
• +12V Battery
• Battery charger
• Graphical User interface(GUI)

8. Microcontroller
 PIC16F887 microcontroller of 8 bit.
 Uses internal oscillator.

9. RF MODEM

10. DIP switch

11. Block Diagram
LED
Display Water
Meter
Micro-
Controller
Micro-
controller
RF
MODEM RF
MODEM
HOME UNIT
Reed
switch
CENTRAL
OFFICE UNIT
LED
Display

13. YES
Start
Initialization
Look for the
query from GUI
Query received
validate the query
with checksum
Build the reply
message
Send the valid
data
NO
ERROR
Select the
destination HU
and send query
wait for reply
Reply
received
Validate the data
by checksum
validate message
received from the
proper
destination
Update the water
consumption
Stop
NO
NO
NO
YES
YES
YES
ERROR
CU SOFTWARE FLOW
CHART

14. Advantages and Disadvantages
Advantages of RF is:
• Real time environment.
• Verified against the manual reading and updates the water
consumption data.
• Utilize the water in an effective manner.
Disadvantage is:
• Water cannot be distributed in the absence of power
supply.

15. Applications
Home appliances for water meter reading
system with advanced communication
technology.

16. Thank You