Maduino SIM808 GPS Tracker

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Revision as of 09:51, 29 November 2017 by Wikiadmin (talk | contribs) (Interface Function)

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Introduction

SIM808 GPS Tracker is an IOT (Internet of things) Solution based on the ATmega328 and GPRS/GSM GPS module SIM808. it intergrate a micro Controller Atmega 328, GRRS/GSM module SIM808, which is the upgrade version of SIM900, power management and storage, to make the SIM808 GPS Tracker ready for real project for IOT projects such as smart-home, outdoor monitoring, shared bicycle, etc.
The SIM808 GPS Tracker based on the Arduino, users can program it with Arduino IDE, which is very easy especially suit for the none-programmers. There are also guide for users to learn how to create the first IOT project with this board, with which the starters can learn the hardware and programming skill quickly.

Model: OAC808SIM
SIM808 GPS Tracker.jpg

Features

  • BAT Input Voltage: 3.4-4.2V
  • ATmega328: 8MHz, 32KB flash, 2KB SRAM
  • Micro SIM connector
  • Integrated Power Control System
  • AT command interface with "auto baud" detection Quad-band: 850/900/1800/1900Mz
  • Send and receive GPRS data (TCP/IP, HTTP, etc.)
  • GPS L1 C/A code
  • 22 tracking /66 acquisition channels
  • Tracking: -165 dBm
  • Cold starts: -148 dBm
  • Time-To-First-Fix:Cold starts-32s (typ.), Hot starts-1s (typ.),Warm starts-5s (typ.)
  • Accuracy: approx. 2.5 meters
  • Interface: I2C/SPI/UART/18*GPIO
  • Arduino compatible
  • Working Temperature: -40 – 85℃
  • Default baud rate: 115200
  • Size: 40*55mm

Interface Function

SIM808 GPS Tracker 1.JPG
①PWR: Power indicate
②CHG: Charge indicate
③VBAT: 3.7V Lipo battery connector
④ CHG: 5V power input, can connect the solar panel to charge the lipo battery.
⑤ Micro USB: 5V power input, USB to serial communication
⑥RESET: Reset button for ATmega328
⑦ Serial port select:

D0&D1 hardware serial port
D7&D8 Software serial port

⑧GPS: GPS Antenna IPX Interface

SIM808 GPS Tracker 2.JPG

①Micro SIM Card Holder
②Micro SD Card Holder

Pins usage on Arduino

  • D0 – RX from A7 (Hardware Serial Communication Selected)
  • D1 – TX to A7 (Hardware Serial Communication Selected)
  • D2 - Unused
  • D3 - Unused
  • D4 - SD Card CS PIN
  • D5 - Low-Power Mode Control of A6 (Low active)
  • D6 - Power OFF Control of A7 (High active)
  • D7 - RX From A7 (Software Serial Communication Selected)
  • D8 - TX to A7 (Software Serial Communication Selected)
  • D9 - Power ON Control of A7 (High active)
  • D10 - Unused
  • D11 - Unused
  • D12 - Unused
  • D13 - Unused
  • D14(A0) - Unused
  • D15(A1) - Unused
  • D16(A2) - Unused
  • D17(A3) - Unused
  • D18(A4) - Unused
  • D19(A5)– Unused

Usage

Get GPS INFO

A7 is a GPRS/GSM+ GPS Quad-band module, with this board, we can use it as a GPS tracker, data acquisition, remote control and a lot of IOT project or smart home project.
A7 add the GPS function compare with A6, so about the GSM/GPRS demo example can refer the Maduino GPRS A7.
1.Insert a Micro SIM card
The Maduino GPRS A7 board uses the micro SIM card that is widely used in Android phone, install the Micro SIM card to the holder as below picture.
Maduino GPRS GPS A7 3.JPG
Note that some fee maybe needed for each SMS depends on your local GSM Operator, make sure that the SIM Card is active and enough money left for this application.
2.Connect the GSM,GPS Antenna and the 3.7V battery
Maduino GPRS GPS A7 4.JPG
3.Programming and Download The Codes for this application is very simple, firstly, define the Softwareserial communication port and A7 Power control pins: (Demo Code Download)

//define the software serial port
SoftwareSerial mySerial(7,8);   //D7: Software serial RX   D8: Software serial TX
//define the power control pin of A7:
int pon=9;  //power on
int poff=6;  //power off
int lowp=5;   //lower power control

GPS power control

sendData("AT+GPS=1 ",1000,DEBUG);

Get current Location information

sendData("AT+GPSRD=1",1000,DEBUG);
delay(1000);
sendData("AT+GPSRD=0",1000,DEBUG);

Select the right port and Arduino board: Arduino pro mini 3.3V 8MHz to upload the firmware to Maduino GPRS GPS boards Maduino GPRS GPS A7 5.JPG
4.Test Result
Open the monitor, it will auto print the GPS Location information, show as below:
Maduino GPRS GPS A7 6.JPG
Note: AT Command:

AT+GPS=1   //open GPS  (NEMA information output from GPS_TXD PIN, but in this board not breakout this pin, please set GPS info output from AT Command serial port)
AT+GPS=0   //close GPS
AT+GPSRD=N  //NEMA information output N	second form serial port
AT+GPSRD=0   // Close the GPS information output form serial port

GPRS Connectivity

The Maduino GPRS GPS A7 can be capable of the GPRS connectivity for Internet, to upload/download data with internet. The following simple example shows the starters how to access a website on the internet (Users need check the AT commands for how to access an website):

     sendData("AT+CCID",3000,DEBUG); 
     sendData("AT+CREG?",3000,DEBUG);     
     sendData("AT+CGATT=1",1000,DEBUG);
     sendData("AT+CGDCONT=1,\"IP\",\"CMNET\"",1000,DEBUG);
     sendData("AT+CGACT=1,1",1000,DEBUG);
     sendData("AT+CIPSTART=\"TCP\",\"gtech.co\",80",3000,DEBUG);
     sendData("AT+CIPSEND=80",1000,DEBUG);
     sendData("GET http://gtech.co/gtech.php?hello HTTP/1.0\r\n HOST:gtech.co\r\n\r\n",100,DEBUG);
     delay(10000);
     sendData("AT+CIPCLOSE ",1000,DEBUG);

Maduino GPRS GPS A7 7.JPG
If the GPRS service accessible, the Maduino board get data from the site, you can check the serial output debug info as:
Maduino GPRS GPS A7 8.JPG

[Case two]: GPRS Connectivity

Of course the Maduino GPRS A6 can be capable of the GPRS connectivity for Internet, to upload/download data with internet. The following simple example shows the starters how to access a website on the internet (Users need check the AT commands for how to access an website):

     sendData("AT+CCID",3000,DEBUG); 
     sendData("AT+CREG?",3000,DEBUG);     
     sendData("AT+CGATT=1",1000,DEBUG);
     sendData("AT+CGDCONT=1,\"IP\",\"CMNET\"",1000,DEBUG);
     sendData("AT+CGACT=1,1",1000,DEBUG);
     sendData("AT+CIPSTART=\"TCP\",\"gtech.co\",80",3000,DEBUG);
     sendData("AT+CIPSEND=80",1000,DEBUG);
     sendData("GET http://gtech.co/gtech.php?hello HTTP/1.0\r\n HOST:gtech.co\r\n\r\n",100,DEBUG);
     delay(10000);
     sendData("AT+CIPCLOSE ",1000,DEBUG);

If the GPRS service accessible, the Maduino board get data from the site, you can check the serial output debug info as:
Maduino GPRS A6 12.JPG
Then you can upload/download related data from the site to create remote data acquisition or remote controlling.

FAQ

You can list you question here or contact with support@makerfabs.com for technology support.

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