Sim5320E is a GSM/GPRS module. You can send a message, make a call, transfer data though the GPRS or something else.
This SIM5320E V3.8.2 module has a set of TTL level serial interface, a set of power supply interface. Besides, there are two set of antenna interface on this module, and one is designed for GPS and the other is for GSM/GPRS.
51 STM32 AVR MCU compatible
The frequency: 850/900/ 1800/1900 /WCDMA 900/WCDMA2100 MHz.
Power supply range: voltage is 4.6-5.2v; current is 1A or more(the current is very important).
Operating temperature range: -40 degrees C to +85 C
Communication interface: The TTL level serial interface compatible 2.85 3.3 5v MCU
The description of pins:
5V GND VMCU RST TXD RXD
Use the TTL interface connect with a MCU
MCU SIM5320E MOULE
DC power positive pole VMCU