Keyestudio SIM800C Shield GPRS/GSM Expansion Board With Antenna Supports DTMF For Arduino Mega 2560/UNO R3 Projects

1. Introduction

This is a GPRS / GSM Arduino expansion board developed by Keyes. It is a shield module with frequency of EGSM 900MHz / DCS 1800MHz and GSM850 MHz / PCS 1900MHz, integrated with GPRS, DTMF and other functions. It supports DTMF, when the DTMF function is enabled, you can get the character feedback from the conversion of button pressed down during the call, which can be used for remote control.

It is controlled by the AT command, you can directly start its function through the computer serial port and Arduino motherboard. The SIM800C GPRS Shield board has a built-in SIM800H chip with good stability.

2. Specification

• Power Supply：6-12V

• Low power consumption mode: current is 0.7mA in sleep mode

• Low battery consumption (100mA @ 7V-GSM mode)

• GSM 850/900/1800/1900MHz

• GPRS multi-slot class 1 ~ 12

• GPRS mobile station class B

• GSM phase 2/2 + standard

• Class 4 (2 W @ 850/900 MHz)

• Class 1 (1 W @ 1800 / 1900MHz)

• Controlled via AT command

• USB /Arduino control switch

• Adaption of serial baud rate

• Support DTMF

• LED indicator can display power supply status, network status and operating mode