Descripition:SIM900 Shield GPRS expansion board is 100% compatible with all standard Arduino development board.Cautions1.Make sure your SIM card is unlocked.2.It is without an insulating enclosure. Please observe ESD precautions specially in dry (low humidity) weather.3.The factory default setting for the GPRS Shield UART is 19200 bps 8-N-1. (Can be changed using AT commands).4.Computer debugging USB–TTL : Powered by: 5V-26V, recommended 2A 5V power supply.Features:Quad-Band 850/900/1800/1900 MHzGPRS multi-slot class 10/8GPRS mobile station class BCompliant to GSM phase 2/2+Class 4 (2 W @ 850 / 900 MHz)Class 1 (1 W @ 1800 / 1900MHz)Control via AT commands – Standard Commands: GSM 07.07 & 07.05 | EnhancedCommands: SIMCOM AT Commands.Power select – select the power supply for GPRS shield(external power or 5v of[…]