Project Report

GSM Based Asset Management & Control System BTH 14-C
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GSM Based Asset Management & Control
System
BY Students of B.Tech Honors 14-C

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Abstract:
The idea is to develop a system which helps to improve human life style,
secure his parameters even if he forgets, or control assets form extreme
distance. The GSM-RELAY unit found best fit in this situation. We try our
level best to demonstrate most of the features with our model. Hope our
efforts will satisfy all your queries.
Project Supervisor:
Respected Sir. Muqtadir Uddin

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Contents
Introduction: ..............................................................................................................................................................5
The packaging we request to the supplier consist of:............................................................................................5
GSM-RELAY Product Description in details:.............................................................................................................7
Specifications:........................................................................................................................................................7
Applications: ..........................................................................................................................................................8
GSM-RELAY USB programming Adopter and Cable:...........................................................................................8
GSM-RELAY PC program software ........................................................................................................................ 10
Phone Number Page........................................................................................................................................... 10
Miscellaneous Page............................................................................................................................................. 11
Relay Page ........................................................................................................................................................... 12
Log....................................................................................................................................................................... 12
GSM-RELAY PROGRAMMING............................................................................................................................... 13
Setting up GSM-RELAY controller module by cell phone:................................................................................... 13
GSM-RELAY SMS COMMAND LIST:.................................................................................................................. 14
#PWD Password:............................................................................................................................................ 14
#CAP Change Password:................................................................................................................................ 14
#ACM Free control mode or safety control mode:........................................................................................ 14
#REPLY SMS reply enable or disable for relay output control command:................................................... 14
#WHL White List: ........................................................................................................................................... 14
#QUERY White List:....................................................................................................................................... 15
#GOT Relay working output delay time: ....................................................................................................... 15
#RLY Temporary latching of output relays (Only Can control from RELAY2 to RELAY7):.......................... 16
#CSQ Check GSM signal quality: ................................................................................................................... 17
#STATUS Configuration checking:................................................................................................................... 17
Customized Text Command to control the OUTPUT:.............................................................................................. 17
On board Reset:....................................................................................................................................................... 18
Troubleshooting ...................................................................................................................................................... 18
No LED is on after power up................................................................................................................................ 18
GSM LED D6 is not flash slowly. .......................................................................................................................... 18
MCU LED D4 is not flash slowly........................................................................................................................... 19
No Relay working tone can be heard when phone calling the device. ............................................................... 19
GSM-RELAY does not communicate with PC....................................................................................................... 19
Relay connection example to Output Driver........................................................................................................... 19

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Modeling:................................................................................................................................................................. 20
Assembling of hardware:......................................................................................................................................... 22
Asset control:....................................................................................................................................................... 22
Room control:...................................................................................................................................................... 22
Primases control:................................................................................................................................................. 22
Electrical Panel Design:............................................................................................................................................ 23
Traditional Electrical Panel Circuit Diagram:....................................................................................................... 24
Electrical Panel Circuit Diagram after Installing GSM-RELAY Module:................................................................ 24
Actual view of the circuit Diagram: ..................................................................................................................... 25
Electronic Part: ........................................................................................................................................................ 27
GSM-RELAY module:............................................................................................................................................ 27
GSM Circuit:..................................................................................................................................................... 27
MCU (Micro controller unit):........................................................................................................................... 27
Relays Circuit: .................................................................................................................................................. 27
GSM Part:................................................................................................................................................................. 27
Now the Big Question…….!!!!!!!:............................................................................................................................. 27
The backup Plan: ..................................................................................................................................................... 27
At point “0”:......................................................................................................................................................... 29
At point “1”:......................................................................................................................................................... 29
At point “2”:......................................................................................................................................................... 29
Budgeting: ............................................................................................................................................................... 29
Conclusion: .............................................................................................................................................................. 29

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Introduction:
GSM relay controller module is designed to control assets remotely. The need of the project is to
developing mind sets about the security issues we have these days and how much resources we are
spending on it. The idea is to use GSM network services as a base system and use GSM-RELAY as a
command execution device. Its GSM module of the GSM-RELAY letch the relays to open and close by
sending commands using SMS/ Call. The GSM module receives the command from user and send the
signal to MCU unit which reads the command and send the signal to the relay unit where the action
required.
This device has many features. For example: Log data, Fast Program and Reset button on board,
Support customized SMS controller for ON/OFF controller and pulse control each separate relay
channels and maximum authorized phone numbers: 200.
The packaging we request to the supplier consist of:
One pcs GSM-RELAY GSM controller board.
One pcs GSM Magnet mount antenna (3 meter wire length).
One pcs USB PC programing adapter and cable.
One pcs Standby rechargeable battery.

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GSM-RELAY Product Description in details:
The GSM-RELAY is a wireless GSM remote controller switch that connects to the GSM cell phone
network. It has seven independent relay switches, and the NO.1 Relay switch is activated by calling its
cell phone number, it will reject the call without answering and switch on the device connected to it,
then there are no call costs incurred when dialing the unit, it will recognize an authorized telephone
number calling it and reject the call without answering. It has other 6 independent relay switches which
can be switched on or off by sending the GSM-RELAY a ` text message.
Specifications:
 Real-time & interactive control
 7 channels 100~230VAC 10A 50 Hz, 30VDC 10A relay contacts
 Works with GSM phones
 Operating temperature (-25°C to +60°C)
 Relays operates almost every appliance
 Small standby power battery (< 10mA 12V)
 Relay memory after power failure
 Optional password to keep the system at safety operating mode

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 Remote Password change
 Two operating mode optional ( remote setting with GSM phones)
 No. 1 relay is working with the phone calling
 Others relays from No. 2~7 working with the SMS
 Commands can added to GSM-phone number for readymade commands
 Working voltage is at 9~24V AC/ DC input power
Country
GSM Frequency Usage
Multiple lines of frequencies indicate different sets
of frequencies being used by different carriers.
Approx. number of GSM
cell phone carriers using
listed frequencies
Pakistan GSM 900 2 carriers
GSM 900/1800 3 carriers
Applications:
Applications include the remote control of heating in holiday homes, lighting, engine pre-heaters, aviation
engine heaters, irrigation systems, water well pumps, pumping stations, cabin heaters, resetting of remote
servers, arming and disarming security systems, access control of gates and garage doors.
GSM-RELAY USB programming Adopter and Cable:
USB Programming cable is used where you cannot administrate your GSM-RELAY controlling module, for
example when you are adding customized commands for desired load to be operated, setting the reply massage
status, or data logging check.

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The above wire picture is to show how to connect the cable to the PC program connector with the Program
adapter. Please connect it in the right direction with the picture.
GSM-RELAY PC program software
The software work on the PC to provide easy programming of the GSM-RELAY module. It is a complete
GUI based program with all the options to set the device for the first time or to troubleshoot it. This
program is freely available on vender website and can be download in zip form. After unzipping you
don’t need to install it. Just run the program and it will work fine.
- The program provides full control on the GSM-RELAY module, starting from showing the
connectivity between Computer and GSM-RELAY module in the status bar of the software
showing “ID:XXXXXX (Integers) is connected”.
- On task bar you can see two tabs “Settings” and “Log”.
- Setting Tab is further divided in to three Tabs which are “Phone Numbers”, “Miscellaneous”, and
“Relay Page”.
- Log tab shows all the setting or changes you have made to the GSM-RELAY module.
Phone Number Page
- It display add, removes and edits the white list. It can store 200 phone numbers who may have access to
the controlled area.

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- You also can export/ import white list to/ from MS Excel Program.
Miscellaneous Page
- In this page you can set the time for the device manually or by automated mean using the fetching the
date/ time from the PC Clock. You can set, Delete, and renew the password.
- You can set the Safety control mode or a free mode, Reply mode, and Relay primary status globally on
GSM-RELAY module.

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Relay Page
- On this page you can set all the activities of all the seven relays the GSM-RELAY module
Log
- Showing every saved configuration you have made, edit, delete, or renew in GSM-Delay module.

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GSM-RELAY PROGRAMMING
You can program the GSM-RELAY with SMS commands using your phone. It is safe to do so because in addition
to the fact that other people may not know the number of the SIM inserted in it, we also use a Password that
makes it impossible for anybody who doesn't know it to access the system by chance. Remember that
commands must be CAPITAL LETTERS. It is PWD not pwd, CAP not cap etc. Don't add spaces or any other
character.
Setting up GSM-RELAY controller module by cell phone:
The following commands is used in the GSM-RELAY
#PWD Password
#CAP Change password
#WHL White List (add or remove numbers)
#ACM Safety control mode or free control mode
#REPLY When send the SMS to control, if need to reply the SMS
#GOT Relay working output delay time
#MODE Relay mode
#CSQ Check Signal Quality
#STATUS Check status once you issue a command with an SMS, you will receive a confirmation SMS with

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OK if everything is correct or Err if there is an Error.
GSM-RELAY SMS COMMAND LIST:
#PWD Password:
This command must always come first 6 digits as a password. The standard default one, when the device comes
from the factory, is 123456. We suggest that you change it, using the #CAP command.
#CAP Change Password:
Use this command to change the password with a new one that you will chose for your device ( don't forget it or
you will have to send the unit back to us to reset it, and this has a cost ) The #CAP command must be issued 2
times to be sure you don't digit a wrong one. OF course it must be preceded by the old password. For example,
to change the password 123456 into the new password 333444 you need to send the following SMS:
#PWD123456#CAP333444#CAP333444 Acknowledge SMS: PWD SETUP OK If you wrote correctly, or an Error
message if you made a mistake. If the old password is error, then conformation would be: Error Old Password.
If you input two different new password, then reply would be: Error New Password, Please Check the
input again.
#ACM Free control mode or safety control mode:
This command is used to select the safety control mode or free control mode
#PWD123456#ACM=ON or #PWD123456#ACM=OFF When at safety control mode, then only the numbers in
the WHL list can control the device Customized Text Command is only working at #ACM=ON mode When at
free control mode, then any number can control the device.
#REPLY SMS reply enable or disable for relay output control command:
This command is used to save the cost for SMS reply when no need the SMS reply back
#PWD123456#REPLY=ON or #PWD123456#REPLY=OFF.When #REPLY=OFF,then any relayoutput control
text command would no confirmed SMS reply from controller, including the OUT, RLY and the Customized Text
Command.
#WHL White List:
This is the command that you will use most. It is used to add or remove numbers that are enabled to control the
relay sets into the White List. You can add up to 200 numbers in the list. Every position must be indicated in the
command and we advise you to keep a list written somewhere to know which numbers are in and in which
position.
• To add a number with SMS, the syntax of the command is the following:
#PWD123456#WHL01=61143815 Acknowledge would be: WHL01 SET TO 61143815 OK Where 01 is the position
in the list and 61143815 is the number enabled. Please note that it is possible to program up to a maximum of 1 8
digits for a number. If it has more digits you should use the rightmost ones. For example, if your number is
33446665555 you should program 3446665555. If your number appears as +85261143815 you should not program
the country code (+852). If your number has only 17 digits or less, it is not a problem. The important thing is that
you don't exceed 1 8 digits.

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• To add a new number, you also can use the fast teaching button:
(Only from WHL01 to WHL10) Press the button KEY1 for around 2 to 3 second and then the LED D1 would be lighting,
and then you can use the phone to call the device number and then device would reject the calling and the LED D1
would flash one or two times, then the number would be saved. If you need to continue to program, then just use
another phone to call the device. If you don’t need to program more, then just press the KEY1 button again to QUIT
the teaching process, then the LED D1 would be OFF. Then you can use the numbers just programmed into the device
to control the device.
(Fast Button program only support the program from WHL01 to WHL10, if it is full, then after you press the
teach button, the LED would flash sometimes, and Quit the process automatically).
• To check which the number in a place of the list is:
#PWD123456#WHL01?
Acknowledge: WHL01 IS 61143815 OK
• To erase a number:
#PWD123456#WHL01=0000000 (or you can write over it another number you wish to add) Acknowledge:
WHL01 SET TO 00000000
List All numbers in the List
#PWD123456#WHL=ALL? (PC)
Acknowledge:
WHL01 IS XXX
WHL03 IS XXX
WHL08 IS XXX ………
#QUERY White List:
If you are not sure a number in the position of the device, you can use the SMS
#PWD123456#QUERY=132324242. The device would answer the SMS with: QUERY RESULT: 132324242 AT
WHL121 Or QUERY RESULT: 132324242 NOT EXIT.
#GOT Relay working output delay time:
This command is useful in case you need to keep the Relay output working longer. The standard time is 0.3
seconds (300ms). You can change it with the GOT command.
• The syntax of the command is the following:
#PWD123456#GOT500 (PC&PHONE)(Only for NO.1 Relay)
Acknowledge: DELAY TIME SET TO 0500MS
With the above command the delay time has been set to 500ms (0,5 seconds).
• You can check what the current relay output delay time is with the command:
#PWD123456#GOT? (PC&PHONE) (Only for NO.1 Relay)

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Acknowledge: DELAY TIME IS 0500 MS
Also you can change the Timer Ratio from millisecond to Second or Minute
#PWD123456#TIMER-DELAY-AT-MILLISECOND;
#PWD123456#TIMER-DELAY-AT-MINUTE;
#MODE Relay Operation Mode SETUP (PC&PHONE) (Only for NO.1 Relay)
#PWD123456#MODE0
Acknowledge: RELAY SET TO MODE0
#PWD123456#MODE1
Acknowledge: RELAY SET TO MODE1
If setup to MODE0, that is Momentary pulse mode, when you call the SIM card number, device will toggle
the relay and delay a GOT timer, then the relay will back the previous status. If setup to MODE1, that is
Ratchet relay mode, when you call the SIM card number, device will switch to the other status ON or OFF,
and when you call again, it will switch the status again.
#PWD123456#MODE? (Check the RELAY MODE Status)
Acknowledge: RELAY IS MODE0 or RELAY IS MODE1
#OUT Relay output control
(1)ON the relay output contact
#PWD123456#OUTX=ON (PC&PHONE) Where X is the number of the relay in the list (X is from 1 to 7)
Acknowledge: OUTX ON OK
(2)OFF the relay output contact.
#PWD123456#OUTX=OFF (PC&PHONE) Where X is the number of the relay in the list (X is from 1 to 7)
acknowledge: OUTX OFF OK
(3)ALL the relay control at the same time.
#PWD123456#OUT=1101011 (PC&PHONE) Where the number is 1 or 0 to ON or OFF the relay.
Acknowledge: #PWD123456#OUT=1101011 OK
(4) Check the relay status
#PWD123456#OUT? (PC&PHONE)
Check the status of all the relay.
Acknowledge: OUT 1110000 (the Number “1” means RELAY ON and “0” means RELAY OFF)
#RLY Temporary latching of output relays (Only Can control from RELAY2 to RELAY7):
This command allows the temporarily switch on the Relays for up to 65,000 seconds and receive confirmation
SMS text alerts when the Relays switch on and off.
 To activate relay 1 for 60 seconds you would send the following SMS text message to the unit
#PWD123456#RLY2=0005 (From RLY2 to RLY7) Where 2 indicates the relay number and 0005 is the time in
seconds and should be entered in a 5 digit format as shown.
The administrator number will receive the following confirmation text message from the unit
OUT2 Timer Start ON for 5 Minutes OK when the relay 1 switches on, the administrator number will receive
the following message when the relay switches off.
OUT2 Timer OFF OK
Note: Relay1 can’t be controlled by the RLY command, if you want to control the Relay1 at a temporary
latching timer, you can setup a suitable GOT timer, and use the phone calling to control directly.

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#CSQ Check GSM signal quality:
(PC&PHONE) This command is useful to see the GSM network signal level, your GSM-RELAY is receiving. It
ranges from 0 to 32 (if it is 0 we doubt it will ever answer...). You should have a signal above 12 to be sure of being
able to control the relay sets in any condition. Better if above 16. You should add an external antenna if this is not
the case, or eventually even change operator with another that serves your area better.
#PWD123456#CSQ?
Acknowledge: CSQ IS 23
#STATUS Configuration checking:
#PWD123456#STATUS?
Acknowledge: ACM=ON, REPLY=ON, RELAY=MODE0, GOT=3S, CSQ=20, OUT=0000000
Customized Text Command to control the OUTPUT:
#PWD123456#OUT1-ON-TEXT:XXXX
#PWD123456#OUT1-OFF-TEXT:XXXX
#PWD123456#OUT1-ON-REPLY-TEXT:XXXX
#PWD123456#OUT1-OFF-REPLY-TEXT:XXXX
#PWD123456#OUT2-ON-TEXT:XXXX
#PWD123456#OUT2-OFF-TEXT:XXXX
#PWD123456#OUT2-ON-REPLY-TEXT:XXXX
#PWD123456#OUT2-OFF-REPLY-TEXT:XXXX ………
Then from OUT1 to OUT7, use the similar command to do the TEXT Command customized.
#PWD123456#RLY1 -TEXT:XXXX
#PWD123456#RLY1 -REPLY-TEXT:XXXX
#PWD123456#RLY2-TEXT:XXXX
#PWD123456#RLY2-REPLY-TEXT:XXXX ………
Then from RLY1 to RLY7, use the similar command to do the TEXT Command customized.
Text Command QUERY:
#PWD123456#OUT-TEXT? (Only for PC command)
REPLY:
OUT1-ON:WSD1ON OUT1-OFFWSD1OFF
#PWD123456#OUT-REPLY-TEXT? (Only for PC command)
OUT1-ON-REPLY-TEXT:WSD1ON OK OUT1-OFF-REPLY-TEXT:WSD1OFF OK

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PWD123456#RLY-TEXT? (Only for PC command)
RLY1-TEXT:WSDRLY1 RLY1-REPLY-TEXT:WSDRLY1 OK
Data Log Check (Only for PC Connecting)
With this command, we can check the inside config and control Log information
#PWD123456#LOG=ALL?
Reply would be as following data: ………
LOGS015:201501072143:18017370819:PHONE
LOGS016:201501072143:18017370819:PHONE
LOGS017:201501072141:18017370819:PHONE
LOGS018:201501071937:+8613564121668:WSDRLY2=13
LOGS019:201501071937:+8613564121668:WSDRLY6=6
LOGS020:201501071937:+8613564121668:RLY3=8 ……….
If use this command not properly, that SIM card will not send the SMS successfully.
On board Reset:
Press and hold the button for around 10 second, then the board would reset, and the following data would be
reset to:
Password: 123456
From WHL01 to WHL10 would be cleared
ACM=OFF, REPLY=ON, MODE=MODE0, GOT=3S, Relay Output=0000000
Troubleshooting
No LED is on after power up.
· Check the power supply.
· Check the wires is connected well.
GSM LED D6 is not flash slowly.
(GSM LED normally flash quickly when power off and when it connected to GSM net, then would flash
around two seconds per time).

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· Check your ordered device if that is the proper GSM BAND to your country. (Some country is QUAD BAND,
some others is DUAL BAND.
· Check the SIM card is properly inserted.
· Check the PIN.(Normally don’t need to check, if SIM card can work with your mobile phone).
· Check the antenna connection is fitted well.
· GSM Signal is not good and can’t register to GSM, try to move to another place to test.
· If still can’t registered to the GSM net, try to contact wafer to get the technical support.
· When LED D6 is flashing slowly, try to call the SIM card, the calling status would be in busy.
MCU LED D4 is not flash slowly.
· MCU is not working properly.
· Check the system power.
No Relay working tone can be heard when phone calling the device.
· Check if your Control number is already setup into the device.
· GSM-RELAY is not initialized properly upon start (approx. 10s after power up).
· If the “#GOT” timer is setup to a very short timer (normally should be more than 500ms).
GSM-RELAY does not communicate with PC.
· Check the serial cable connection.
· Check the COM number setting on PC.
· Check if you select the “New Line” selection box.
· Check if you input the right instruction line and that should be all use the Capital word.
· Check the COM parameters (9600 bps, 8N1).
· An incoming call is ringing on GSM-RELAY.
· An incoming SMS message is on processing by GSM-RELAY.
Relay connection example to Output Driver
The relay control outputs are suitable to control seven different household and other devices as are air-
conditioning and heating, connected directly or through external relay modules. Each relay output has NO and
COM contacts.The “Load”willbe connectedto “NormalOpen”and“ACSupply”willbe connectedto “Common”.

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Note: Power supply for the each load mustn’t exceed 30VDC/10A or 230VAC/10A.
Warning: GSM-RELAY device only work as a high power switch, don’t power the LOAD directly.
Modeling:
The Model is scaled to demonstrate all the possibility which the GSM-RELAY module capable off. The dimensions
of the model are:
32in Length X 32in Width X 24in Height
Internally the Structure is further divided into 4 equal portions to simulate the rooms in home. Transparent Acrylic
walls are used to achieve said objective. The dimension of the separators are to make each room of:
16in Length X 16in Width X 24in Height is:
32in Length X 24in Height
The separators are two sheets of above mentioned size with the cut of 18in deep and 3mm thick in the center of
the sheet. The below diagram will demonstrate the cutting and fixture of the acrylic sheets.

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One side of the four, is wooden and relatively thicker than transparent acrylic sheets. This is the side where we
will hang the Electrical Panel. Other three are Transparent Acrylic Material. All sides of the structure will be same.
Dimensions of the sides are:
32in Width X 18in Height
The Wooden Base is slightly bigger in size to hold the structure above it including all the appliances. Dimensions
of the Wooden Base are:
36in Length X 36in Width
The top/ roof of the model will be another colored acrylic sheet with soft wooden sides to improve to stability
and memory of the structure. The dimensions of the roof of the model is:
32in Length X 32in Width

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The interior of the structure will contain the appliances. Which includes:
- An AC Exhaust Fan (Simulating Bracket Fan).
- An AC White Milky Circular Shaped Tube Light.
- A DC Computer, demonstrating motor for water transferring.
- A DC LED circuit, which will demonstrate the outside wall light.
Please note that all the Appliances are in different rooms and GSM-RELAY module will simulate appliance
control and Room Control system simultaneously.
Assembling of hardware:
When all the hardware come together it will become the controlled environment of the asset management
system.
This system has the capability to control almost all hardware used in home. The technique has a huge applications
in industry as well.
The GSM-RELAY module, the model and the electrical panel become the demonstrations tool for all controllable
scenarios. Which are as under;
1. Asset control
2. Room control
3. Primases control
Asset control:
The circuit is designed in such a way that you can set/ control your appliance using GSM-RELAY module. That can
be done by configuring connected relay to the asset and a simple SMS command will turn off or/and on your
appliance. Hence you are in control of every appliance in the model, each control by a separate relay and each
relay can be operated bay separate command using SMS.
Room control:
The asset control circuit is also a room control circuit. As we are working on a model just to demonstrate the
capability on GSM-RELAY module therefore; each room contain a single appliance. Hence if you turn off or on any
device in the model, it will also demonstrate the room control scenario as well.
Primases control:
The circuit is also designed to demonstrate the primases control facility by shutting down and/ or power on all the
appliances and rooms in a same time using just one command.
As we know that the system can operate on both modes SMS and Calling.
When we are calling GSM-RELAY module, specifically relay no.01, this is the only relay which has the capability to
take command by using calling. The system will take a call and eventually it will reject the call, so no call fare will
be charged, but it will trigger the relay to operate either on or off. Other than this relay, all the relays will respond
on SMS.
Assembly design is as under:

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Electrical Panel Design:
The Electrical panel is designed especially for the model as a prototype of the real application. The panel circuit
is also designed by the Team members (Mudassir & Aejaz). We both visit market to finalize the panel and its
components. Every component, by function will be labeled for installation, maintained, and identification point
of view. The list of components used in panel designing are as under:
1. Indicators for each room, all are different colors.
2. 4 Single-pol Circuit Breakers for each room.
3. 1 Double-pol Circuit Breaker for Main Supply.
4. Metallic Panel Box, Open Installation type.
5. Connected wires.
6. Space left for placing GSM-RELAY module and Wiring.

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Traditional Electrical Panel Circuit Diagram:
The traditional electrical panel circuit is exactly the same as the simplified version we put in our model, which is
as under:
Electrical Panel Circuit Diagram after Installing GSM-RELAY Module:
The circuit will remain same at least most of it, the only difference you will observe is the link directly connected
to the load is now passing through GSM-RELAY module. The design contain AC and DC circuits. All DC circuits’
operational power will be converted from AC circuit and will be placed in the Electrical panel. The SIM card will
be installed in the GSM-RELAY module is only for demonstration purpose and it is not part of the Project. The
design is mentioned below:

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Actual view of the circuit Diagram:

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Electronic Part:
There are several electronic equipment’s we are using in this project. The details are as under;
1. GSM-RELAY module, which plays most important part as the idea behind the project is full filled by this
unit.
2. DC supplies, for GSM-RELAY module and other loads we are using in this design.
3. DC loads (Emergency Light connectivity).
GSM-RELAY module:
This unit is consist of three parts for differently working units combined together to serve a purpose. The parts
are;
a. GSM Circuit.
b. MCU (Micro controller unit).
c. Relays circuit.
GSM Circuit:
The circuit consist of fully functional GSM SIM card operational circuit. It has SIM Jack from which it can take all
instructions, which it will forward to MCU and reply back.
MCU (Micro controller unit):
This part receive instructions from GSM Circuit and interprets, recognized fool proofing, check each part of the
instruction, for example password, which rely to operate and what mode of instruction would be addressed. After
decoding instruction received by GSM Circuit, it forward latching voltages to Relays Circuit.
Relays Circuit:
That is the area where all the action is happening. After decoding, MCU knows that the instruction is for which
Relay and operating mode.
GSM Part:
GSM part is most easily and in a same time most important part as well. We use commonly available GSM service
from local service provider to instruct a device. To do so, we put the SIM card in the module so that device can
take instructions.
Now the Big Question…….!!!!!!!:
What if the device gone rouge during operation……..?????
What will happen then………?????
Will the customer bare no electricity, while having electricity just because of device failure………?????
The backup Plan:
To answer the above question we have come up with an idea of using 102-3Phase unit as a 2 way selector. The
device is technically used for the 3-phase and a neutral phase changer, but to serve our purpose we have selected
this device to become a 2 way selector. The line diagram for the solution is as under;

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At point “0”:
All the power from breakers diverted to common of 102-3Phase (AKA 2way switch). By doing that it become a
safe point for selecting in any direction and it also behaves like a barrier between direct load and via device.
At point “1”:
When the selector turned on “1”, the 2way switch divert all power towards device. Hence the device become
operational and all power flows through device. The model become fully controlled by GSM-RELAY module. This
includes all AC & DC devices.
At point “2”:
When the selector turned on “2”, the 2way switch divert all power towards the main supply to the model
bypassing the device. A return current will be redirected to the relays, but it is quit safe as at off position the relays
will not latched, so that the current will not flow.
Budgeting:
S. No. Items Cost PKR Total
01 GSM Relay Module 23500.00 23500.00
02 Acrylic Box for module 00500.00 00500.00
03 Electrical Panel 03000.00 03000.00
04 Acrylic Model with damages 10500.00 10500.00
05 102 3-Phase Selector with box 02000.00 02000.00
06 Power Adopter for DC devices 00400.00 00400.00
07 Connected leads 00900.00 00900.00
08 Carpenter 03000.00 03000.00
09 Stickers and Badges 01600.00 01600.00
10 Project Report 00500.00 00500.00
Grand Total 44100.00 44100.00
PER HEAD COST OF THE PROJECT 8820/=
Conclusion:
By the circuit diagrams and the demonstration the key features of the device were successfully tested and are
ready to demonstrate all said features in front of panel, henceforth; we meet the success criteria for our project.
Contact Info:
 Sir. Muqtadir Uddin Project Supervisor.
 Mudassir Mubin Baig Team Leader +92 333 2177606, +92 345 2101701
 Moeed Ahmed Planner +92 315 2420903

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 Shoaib Ahmed Installation +92 300 3393874
 Aejaz Askari Operation +92 333 2274538
 Ammad Mustafa Operation +92 345 3178322

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