The SIM900 can draw big burts of current and may not work reliably if powered off of USB. For a reliable connection we'd recommend powering it directly off a LiPo ...

The SIM900 Arduino Shield Library is a versatile and powerful Arduino library for interfacing with the SIM900 GSM/GPRS module. This library provides a wide range of functionalities for working with ...

In today’s modern world we all depend on mobile phones as our primary means of wireless communication. But, we all have faced situations during which we might not be able to answer to our calls, these ...