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.
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.) .