Hello friends, I hope you all are doing great. Today, I am going to share the new SIM900A GSM Library for Proteus V1.1 . The SIM900A on its blue "SIM900A MINI" board is one of the cheapest ways to give an Arduino its own phone number: it sends and receives SMS and tells your sketch who is calling. It is also famous for a nasty surprise: in many countries, a brand-new SIM900A never connects to the network. With this SIM900A Library for Proteus , you can build your GSM project on your PC, see every line the module answers and even reproduce that region lock before you buy any hardware. You get two devices in one library: SIM900A Simple , with a virtual smartphone next to the module on the schematic, and SIM900A Advance , with a pop-up window that holds the phone and four measured GSM test to ...