The frequency bands also can be set by AT command “AT+CBAND”. SIM800 can search the 4 frequency bands automatically. This makes it useful for applications such as home automation, agriculture automation, etc. It can be used for sending/receiving messages, making calls, sending/receiving data over the internet, etc.
A host microcontroller can send AT commands over the UART interface and control the SIM800. It integrates TCP/IP protocol.SIM800 can be controlled/configured using simple AT commands. Audio channels are also there, which include a microphone input and a receiver output.SIM800 has one SIM card interface. It also has one USB port that can be used for updating firmware and for debugging. It also features GPRS multi-slot class 12/class 10 (optional), and supports CS-1, CS-2, CS-3, and CS-4 GPRS coding schemes.
SIM800 is a quad-band GSM/GPRS module that works on frequencies 850MHz GSM, 900MHz EGSM, 1800MHz DCS, and 1900MHz PCS.
