✍ 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.


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▼ Features
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.)

▼ Package Included
1 x SIM900A
1 x Pin Headers
1 x Antenna