I made this project in order to build a surveillance car which can be controlled over Internet or on any private network. My objective was to easily and cost effectively do something that can be used for security purposes.
My car uses uses DTMF module which takes it’s input from mobile phone attached to the car, that mobile is not only used to generate DTMF tones but also for the surveillance by providing Live Footage from it’s camera, over the network using AirDroid.
Conventionally, any project using DTMF requires call from another cell phone to the one attached to the project, which is not cost effective, but in case of my project I used an android app DTMF Tone Generator which generates DTMF tone now for this to work I shared my phone’s screen over the network using VNC server, hence cost effective.
To make this Idea more effective I mounted the phone on a servo motor. This gave my Camera one degree of freedom, i.e. I can move it left and right without moving the bot.
Generally, there is one more security problem involved with DTMF, that is, anyone can control the bot by calling the mobile phone attached to the bot. A simple solution to this problem was to apply a PIN using DTMF tones. I demonstrated this concept in the video and for the inner working you can check the source code.
- Far much more cheaper than the bluetooth and Wifi modules, with almost Identical working.
- Can be controlled via Internet using VPN.
- one can efficiently keep track on activities in his/her house when there are no occupants.
- It can be used for surveillance purposes in Dangerous areas where there is any kind of threat to human life.