I'm trying to get my Arduino Mega to run Modbus using Sim800L's GPRS. I've implemented Modbus on Mega before for wifi and serial, but with Sim800 I had no luck yet. Working with wifi and serial, I was able to find a lot of libraries and could identify the one I needed but in Sim800's case, I can't even find a library.
The point of the project is to get a sim card that has a static IP, use its GPRS to connect to it and control it using Modbus. I already got Sim800 to work, I can't make and recieve calls, send SMS or read them, connect it to GPRS and read data from internet.
Thanks for the replies in advance.