Write C Program for Raspberry Pi to communicate with GSM Module

Project Brief - C Program, Raspberry Pi to Sim800 GSM Module to send/receive data ***MUST HAVE PROJECTS OF THIS NATURE IN YOUR PORTFOLIO. Write a c program to communicate between a Raspberry Pi 3 and a GSM module via the UART bus, specifically the ‘Itead Raspberry Pi GSM Board (SIM800)’. [login to view URL] The program must be written in C and annotated to help the in house team to understand its contents. The specification is as follows: - Send data periodically from the Raspberry Pi’s GPIO pins to a HTTP database. We need to send data once every minute. - The program will be running 24 hrs a day 365 days a year and must therefore offer a stable and robust solution. - Monitor the data being sent from the GSM module and be able to issue a reset if the data is not reaching the HTTP database. - Receive data from the HTTP database and be able to issue commands to the Raspberry Pi’s GPIO pins based on what is received. We believe the AT commands we need to connect to our http database are: at+sapbr=3,1,”Contype”,”GPRS” at+sapbr=3,1,””,”” at+sapbr=3,1,””,”” at+sapbr=3,1,””,”” at+sapbr=1,1 at+sapbr=2,1 at+httpinit at+httppara=”CID”,1 at+httppara=”URL”,”http://...” at+httpaction=0 at+httpterm at+sapbr=0,1 ***MUST HAVE PROJECTS OF THIS NATURE IN YOUR PORTFOLIO.