Hello, I've written several DCS' but never for this device. Considering your requirements for complete functionality realistically the project will take 2 to 3 weeks to develop, debug, and test. The camera & microphone features are not supported by Open GTS, Nor is the "Get Street Address by SMS" function which will require querying the reverse geo-coder, which is something that is not generally part of a DCS for speed reasons.
Could you please post the protocol for the device to this project, or send it to me via the PMB?
Please feel free to contact me if you have any questions.
Regards,
John H. Ward, Jr.