Home > Arduino & SCM Supplies > SIM900A
SIM900A Dual-band Network Serial GPRS GSM Breakout Module
About the SIM900A GSM module : 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 8ohm speaker and electro microphone. - Send and receive SMS messages. - Send and receive GPRS data (TCP/IP£¬ HTTP£¬ etc.) . About 3G PCB Antenna : - Suitable for SIM800L GSM modules / Arduino SIM900 GPRS Shield - Frequency: 780MHz ~ 960MHz£¬ 1710MHz~2170MHz - Antenna gain: +2.0 ± 0.7 dBi @ 880 MHz£¬ +2.0 ± 0.7 dBi @ 1800 MHz - S.W.R <= 2.0 @ 2100 MHz ~ 2500 MHz - Output Impedance: 50 Ohm - Extension cable interface: IPEX