Description

Specification Details
Cellular module SIMCom SIM900
Network technology 2G GSM/GPRS
Frequency bands 850 / 900 / 1800 / 1900 MHz
Main functions SMS, voice calls and packet data
GPRS capability Multislot class 10/8
Maximum GPRS data rate Up to 85.6 kbps download under suitable network conditions
Control interface UART using AT commands
UART baud rate Configurable, typically 1,200–115,200 baud
Bare-module supply 3.2–4.8 V DC; typically 4.0 V
Peak supply current Up to 2 A during transmission bursts
Bare-module logic level Approximately 2.8 V
SIM interface Supports 1.8 V and 3 V SIM cards
SMS formats Text and PDU
Audio support Microphone and speaker interfaces; availability depends on breakout connections
Antenna connection SMA connector with external GSM antenna on the pictured board
Onboard features SIM-card holder, serial headers and status indicators
Applications SMS alerts, remote monitoring, telemetry and cellular control systems