SIM800

INTRODUCTION

SIM800 is a complete Quad-band GSM/GPRS solution in a SMT type

which can be embedded in the customer applications.SIM800 support Quad-

band 850/900/1800/1900MHz, it can transmit Voice, SMS and data information

with low power consumption. With tiny size of 24*24*3mm, it can fit into slim

and compact demands of customer design. Featuring Bluetooth and Embedded

AT, it allows total cost savings and fast time-to-market for customer

applications.

KEY FEATURES

AT command interface

Quad-band and Dual-band variants*

Make and receive voice calls

Send and receive SMS messages

Send and receive GPRS data (TCP/IP, HTTP, etc.)

Bluetooth: compliant with 3.0+EDR*

USB Connector for Firmware Updating*

Configurable Baud rate (9600-115200, factory default value: 9600)

Connectors for external speaker and mic.

Selectable interface between hardware serial port and software serial port

Inbuilt Powerful TCP/IP protocol stack for Internet data transfer over

GPRS.

Level shifting circuitry to make it Arduino-safe

SMA Connector with external antenna

Indicator LEDs for Power and connectivity

Standard Flap type SMA Socket

ESD Protection over TVS Zener array

Separate Reset switches for both Arduino and the shield

Slide switch to swap the shield between Arduino and PC

Provision to select between hardware and software serial ports

LED INDICATIONS

The Network LED indicates the various status of GSM module eg.

Power on, Network registration & GPRS connectivity. When the modem is

powered up, this NETWORK LED will blink every second. After the Modem

registers in the network (takes between 10-60 seconds), this LED will blink in

step of 3 seconds. At this stage you can start using Modem for your application,

showing that modem is registered with the network.

LED POWER STATE INDICATOR

POWER

LED

ON POWERED

STS LED ON READY TO

FUNCTION

NET LED

Blinking 1-sec Once YET TO FIND THE

NETWORK

Blinking 3-sec Once FOUND THE

NETWORK

Blinking 3-sec Once GPRS

COMMUNICATION

PIN DETAILS

IMAGE OF IOT MODEM

CONNECTION DESCRIPTION

1. Power

Supply

VCC - 7v-12v input Power supply

GND - Ground

2. RST Reset Switch

3. D2 TX - connect to RX of microcontroller

4. D4 RX – connect to TX of microcontroller

5. MIC, SPK Microphone and Audio output device

6. SIM SLOT Inset SIM Properly according to the Identification

7. ANT Antenna For GSM Communication

8. Serial RS232 RS232 Communication for GSM Modem to PC

9. Micro USB POWER through Micro USB

10. Jumpers

JP17 - TX - Connect the J17 Jumper, to make

communication between on board microcontroller and

GSM modem

JP18 - RX - Connect the J18 Jumper, to make

communication between on board microcontroller and

GSM modem

JP3 - Connect the JP3 Jumper, to make On Board LCD

Backlight ON

11. LED’s LED’s to indicate POWER, STS, NET

12. IC On Board ATMEGA-8 Microcontroller

13. TTL TTL Serial Communication for GSM Modem to PC

14. IC 5v Regulator IC

15. GSM SIM800A GSM Module

16. MAX232 IC Serial Communicate

JUMPER SETTING

JP3 Connect the JP3 Jumper, to make On Board LCD Backlight ON

JP17

TX - Connect the J17 Jumper, to make communication between on

board microcontroller and GSM modem

TX – Disconnect the J17 Jumper, to make use of only as a

Microcontroller Board or only as GSM Board

JP18

RX - Connect the J17 Jumper, to make communication between on

board microcontroller and GSM modem

RX – Disconnect the J17 Jumper, to make use of only as a

Microcontroller Board or only as GSM Board

REFERENCE CIRCUIT

Breakout Board SIM800A IOT Modem GND

D2 D4

Microcontroller GND TX RX

SET BAUD AND ENABLE CHARGING FUNCTION

It is recommended to execute this process when first time to use the module. In

the Serial Monitor columns of following tables, input of AT commands is in

back, module returns values are in orange.

Serial Monitor Description

AT

OK

Send command “AT” to synchronize baud rate. Serial

port of module is by default set at auto-baud mode, and in

this mode, it will not output any indications when the

module is on.

AT+IPR=9600

OK

Set baud rate at 9600bps, supports baud rate from

1200bps to 115200bps.

AT+ECHARGE=1

OK

Send command “AT+ECHARGE=1” to enable battery

charging function. By default the charging function is

closed.

AT&W

OK Save parameter setting.

AT+CPOWD=1

NORMAL POWER

DOWN

Power down the module.

RDY

+CFUN: 1

GPS Ready

+CPIN: READY

Call Ready

SMS Ready

Turn on the module again by the power button, it will

response status about GPS and GSM.

AT+CBC

+CBC: 1,96,4175

OK

Inquire charging status and remaining battery capacity.

AT+CSQ

+CSQ: 14,0

OK

Inquire GSM signal quality.

COMMUNICATION BETWEEN MODEM AND PC

Serial Monitor Description

$

ENTER THE MAIN URL

http://WWW.________.______/>:

Send “$”symbol

to synchronize

baud rate (9600).

myiotproject.com

ENTERED URL IS myiotproject.com. 1. OK 2. REENTER

Send Website

address.

1 or 2

ENTER THE USER ID:

1 for you typed

website address

is ok, 2- for

reenter the

website address.

USER1

ENTERED URL IS USER1. 1. OK 2. REENTER

Enter the website

user ID

1 or 2

ENTER THE NO.OF VARIABLES (min 1) (max 9)

1 for you typed

website user ID

is ok, 2- for

reenter the

website user ID

.

1 to 9 (Any Number as per user need) e.g: if I entered 2

YOU SHOULD SEND 2 VALUE.

1. OK 2. REENTER

Send 1 to 9

different

variables i.e

You can send 9

different sensor

values

1 or 2

ENTER THE VALUE 1 URL e.g:<temp> 5 char max:

1 for you

variable number

is ok, 2- for

reenter the

variable number

TEMP

Entered Variable name is TEMP 1. OK 2. REENTER

Set the 1st

variable name

(max-Character

is 5)

1 or 2

ENTER THE VALUE 2 URL e.g:<temp> 5 char max:

1 for you

variable name is

ok, 2- for reenter

the variable

name

GAS

Entered Variable name is GAS 1. OK 2. REENTER

Set the 2nd

variable name

(max-Character

is 5)

1 or 2

THE SAMPLE URL IS .

http://www.myiotproject.com?usee=”USER1”&TEMP==---

/"

1 for you

variable name is

ok, 2- for reenter

the variable

name

~

TEMP

Send “~”

symbol to Send

Sensor Value

Website

You will Get

“Temp” from

website

(You will get

variable name

according to

that you have to

send data )

Send Temperature Value

GAS

Now Send

Temp Value

You will Get

“GAS” from

website

Send GAS Value

Now Send

Temp Value

TERMINAL OUTPUT

WEBSITE OUTPUT WINDOW