Control using GSM

Lately I did 3 GSM based projects, below are the details

  • Speed control of stepper motor using GSM
  • Home automation using GSM
  • Car security using GSM

Speed Control of Stepper motor using GSM

The application of this project is the flood gate control in farms, the farmer can remotely open and close the flood gates, many more functionalities can be added, there are ample of free IO pins, so we can control some motors, pumps, etc.   All these are controlled by sending SMS to the GSM module, the micro-controller is configured in such a way that it will accept commands only from a specific number, this number is hard-wired in the controller, and can only be changed by uploading updated firmware.

IMG-20130505-00329

Home automation using GSM

This is project controls 3 relays, but many more can be added to control more devices, up to 18 devices can be controlled. Again the controller accept commands from only one number.

IMG-20130325-00292

IMG-20130330-00294

Car Security System

This project uses all the IO lines, as it is controlling many things, below is the list of the components of the car it is controlling

  • Automation air conditioner control
  • Status shown on LCD
  • Power windows
  • Air conditioner compressor motor
  • Ignition subsystem
  • Door locking
  • Alert system(blinking Light and horn)
  • Intrusion sensor
  • GSM module
  • Driver in sensor

When the used driver is in the car, the ignition subsystem is active, so the driver can start the car, the door is unlocked,he can open/close the windows, when the driver is not present the car goes in alert mode, so the intrusion sensors become active, if any intrusion is detected, a SMS is sent to the drive that there is an unauthorised entry in the car, the ignition subsystem is turned off, so the car will not start, and the car will start blinking the all signal lights and will blow the horn and the windows will not open.

If it is a false alarm, there is hidden off switch provided, so the driver can turn it off, or if the driver is way, he/she can turn off the alarm using the phone by sending a SMS, the car accepts commands only from a single number.

This is the prototype with all the above mentioned functionalities.

IMG-20130506-00335

Comments:

Subramanya Chakravarthy - Oct 2, 2013

can you please give me at commands for speed control

The code is available here https://github.com/hemalchevli/Sketchbook/blob/master/Student_projects/GSM_Stepper/GSM_Stepper.ino

can i do using call like when i make a call and when i pressed button it moves forward

ya you can do that, but you would have to use a DTMF decoder and add some code to pick up and hang up the call. See my other post, http://localhost/black_electronics/dtmf-home-automation/ this was done using a land line.

i know using dtmf but i want to decrease the weight and increase speed but gsm only supports sms

Not entirely true, gsm module(SIM 300 and SIM900), support voice communication, sms and even you can connect to internet using GPRS, The module(sim900 from rhydo labs, I think SIM300 is no longer in production) I used had pin to connect speaker and microphone, So it is possible usng DTMF, and about weight and speed, I’m not sure in what context, if its close range communication, GSM is not the best way to do it.

thank u very much i will try using sinm900 with dtmf and if u have any information using dtmf please tell me

I’ve messaged you some links on facebook.

can give me a commands for home automation

You can find the source code from my github, https://github.com/hemalchevli/Sketchbook/tree/master/Student_projects/home_automation_android

thanks