SIM900A Dual-Band Mini Network Serial GPRS GSM Breakout Module

Specification

• Working frequency: 900MHz / 1800MHz
• Working voltage: 4.4 ~ 5.3VDC
• Working Current: maximum of 2A, an average of 50mA
• Sleep Current: 4mA
• Communication Interface: TTL serial port
• Baud rate: It can be set to be auto-bauding and it can also be set by AT command
• Interface logic voltage: 3.3V
• Make and answer phone calls using a headset or an external 8Ω speaker and electret microphone
• Send and receive SMS messages
• Send and receive GPRS data (TCP/IP, HTTP, etc.)
• This is mini GSM / GPRS core board based on SIM900A. It supports dual-band GSM/GPRS network, available for GPRS and SMS message data remote transmission.
• The board features compact size and low current consumption. With power saving technique, the current consumption is as low as 4mA in sleep mode.
• It communicates with microcontroller via UART port, supports command including GSM 07.07, GSM 07.05 and SIMCOM enhanced AT Commands.