SIM900A Modem is built with Dual Band GSM/GPRS based SIM900A modem from SIMCOM. It works on frequencies 900/ 1800 MHz. SIM900A can search these two bands automatically. The frequency bands can also be set by AT Commands. The baud rate is configurable from 1200-115200 through AT command. The GSM/GPRS Modem is having internal TCP/IP stack to enable you to connect with internet via GPRS. SIM900A is an ultra compact and reliable wireless module. This is a complete GSM/GPRS module in a SMT type and designed with a very powerful single-chip processor integrating AMR926EJ-S core, allowing you to benefit from small dimensions and cost-effective solutions. Specification Dual-Band 900/ 1800 MHz GPRS multi-slot class 10/8GPRS mobile station class B Compliant to GSM phase 2/2 Dimensions: 24*24*3 mm Weight: 3.4g Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands) Supply voltage range : 5V Low power consumption: 1.5mA (sleep mode) Operation temperature: -40°C to 85 ° Recommendation To ensure that the Sim is connected to the tower, use a 5V 2A power supply. Less than 2A, the Sim sometimes won’t connect with towers.
