I am sending some information from sensors to cloud by using sim800 module and Raspberry pi with the help of PPP internet connection, I am using RI pin to detect the ring, if ring detects i have to switch from internet to command mode, it took 35 seconds to switch from internet to command mode. My request is to switch from internet to command mode asap. suggest me alternate method also.
I have made projects like this and have prior experience in the modules which are to be used in the projects.
I will complete this project on time as said.
So please provide us with this project.