I have bought SIM 900A GSM MODEM. It is working perfectly on serial interface but it require an extra Serial to USB converter module. So I want to interface it with my Raspberry Pi 2 Model B via I2C Interface.
I am new to I2C Interface. Please suggest the connections/schematic or if I require to add any other module (Isolation system) in order to connect via I2C Interface as mentioned in (https://) youtube.com/watch?v=oTOIzdwE84k video.