Dear Dharmang,
Luckily, I've worked on all of the components that you've mentioned in this project. Below are details:
1. HC-05: I've made a Bluetooth Switch device using this module (and BMX-03B BT module ) and arduino in one of my project. I've also made an Android app to operate this BT Switch from smartphone. Prototyping was done using Arduino board and final device was designed using Atmega328p mcu. So I designed the PCB as well. Two versions were made, one with HC-05 and other with BMX-03B.
2. SIM900 GSM Shield: Did several projects with this shield and arduino. I've used it in a tracking device. I've also customized SIM900 library for a smaller footprint.
3. GPS Shield: Did couple of projects for location tracking.
4. 4x3 Keypad: Developed a Web Kiosk which has several buttons interfaced with arduino for user interaction. 4x3 keypad can easily be interfaced too with arduino.
If you need further details, pls. let me know.
I've most of the h/w ready with me to start work, this includes:
1. HC-05 and BMX-03 BT modules
2. Arduino boards
3. SIM900 GSM shield
4. Android phone and Development Setup (SDK)
I can do quick prototyping and PCB designing too if needed.
This project sounds interesting to me and I would really like to work. If I am not wrong, from project description it looks some sort of security device, may be an electronic lock. Is it?
Pls. provide further details so that I can do proper time and cost estimation.
Thanks!
Best Regards,
Polestar