Familiarize with rhydolabz Tracking Shield (SIM800 / SIM900 / SIM900A)

An all-in-one arduino compatible shield from rhydoLABZ, that lets you add location-tracking, voice, text, data connectivity and data storage to your project in an adorable little package. The shield features new generation GlobalTop GPS chipset and SIM800/900/900A. With GPS technology, the shield supports satellite navigation along with cellular connectivity and that makes most of what you need for your robotics projects.

GSM/GPRS connectivity is controlled via AT commands, while the GPS functionality follows NMEA protocol. The shield also offers data storage on microSD card. The design of this shield allows you to drive the GSM module directly with the computer as well as with your Arduino Board. The package includes duck type SMA antenna for cellular network connectivity and an active external antenna for GPS functionality. GPS U2P module offers a high sensitivity, incredibly low power consumption while searching with -165dBm high sensitivity and 10Hz maximum update rate. Featuring an industry-standard interface and GPS function, the combination of both technologies on a single shield allows items, vehicles and people to be tracked seamlessly at any location and anytime with signal coverage.

Features

AT command interface
Quad-band (SIM900 and SIM800) and Dual-band (SIM900A) variants
Make and receive voice calls
Send and receive SMS messages
Send and receive GPRS data (TCP/IP, HTTP, etc.)
Inbuilt Powerful TCP/IP protocol stack for Internet data transfer over GPRS
Bluetooth (for SIM800 only) : compliant with 3.0 + EDR
Debug Connector for GSM firmware updation
Standard Flap type SMA Socket
ESD Protection over TVS Zener array
Configurable Baud rate (factory default value: 9600)
Standard Audio Jack Connectors for external speaker and mic
Level shifting circuitry to make it Arduino-safe
SMA connectors to connect external antennas for GSM & GPS
Indicator LEDs for Power, Netlight, Status and 3D Fix
GlobalTop U2P GPS with MediaTek MT3339 Chipset
MMC card slot for data storage
GSM module communicates via hardware serial pins
GPS module communicates via software serial pins
- S-TX – digital pin 5
- S-RX – digital pin 4
Separate Reset switches for both Arduino and the GSM module
Slide switch to swap the GSM module between Arduino and PC
Supply Voltage : 7-12 V DC
On-board 5V & 3.3V regulators

SIM900A, SIM900 & SIM800SIM800 modules are upgraded version of its previous successful GSM/GPRS/GPRS module series SIM900. There are multiple sub versions of each series, each of which cater to a different set of users and applications. SIM900 comes in the form of full version Quad band SIM900 & dual band version SIM900A. SIM800 itself is the full version Quad band SIM800. There are other SIM800 & SIM900 versions but very less information available about them, so they have not been discussed.

What extra does SIM800 modules give me compared to SIM900 series modules? SIM800 GSM modules have a inbuilt Bluetooth stack compliant, and the interface is accessible using AT commands.

SIM900 and SIM900A modules operate from 3.2V to 4.8V supply range while SIM800 modem operates from 3.4V to 4.4V supply range (Reduced operating range!). Same AT commands used for simple call/sms functionality in SIM900, SIM900A can be used with the SIM800, but SIM800 series have added AT command set for supporting extra features like bluetooth.

SIM800 module is needed only if you need those additional features that are not present in SIM900 series modules, like the Bluetooth connectivity which was missing in SIM900 series. SIM800 and SIM900 can be operated worldwide because they can operate in all four GSM bands used across the world.

Layout

LED Description

PWR – Power indication, turns on when the shield is powered
NET – Network status
- Off – Modem not running
- 64ms on/ 800ms off – Modem not registered to the network
- 64ms on/ 3000ms off – Modem registered to the network
- 64ms on/ 300ms off – GPRS communication is established
STS – Indicates operating status of the module. LED is on when the module is powered.
3D – Blinks when GPS is not fixed, turns off when GPS is fixed

Jumper Description

J1(RF-IN) – Short J1 to use active antenna for GPS
J2 – Short to connect GPS RST to digital pin 6 of Arduino
J3 – Selects IOREF as 3.3 / 5 V
J4 – GSM Antenna connector
J5 – Short to connect PKEY to digital pin 8 of Arduino
J6 – Short to connect GSM RST to digital pin 7 of Arduino
J7 – Short to connect GPS RX to S-TX (digital pin 5) of Arduino

Connector Description

K1 – Power Supply
K2 – GPS Antenna connector
K3 – Speaker Jack
K4 – MIC Jack
K5 – SIM Socket
K6 – Provision for U. FL antenna connector
K7 – GSM debug
K8 – SD card socket
K9 – Arduino ICSP

Switches

SW1 – DPDT slide switch to swap the shield between Arduino and PC. The shield communicates with Arduino / PC as selected by the switch
SW2 – Arduino Reset
SW3 – GSM Reset

PKEY using Arduino

PWRKEY pin of GSM modem is to turn modem On/Off externally using open collector transistor or switch. You can turn on/off the modem alternately by driving the PWRKEY to a low level voltage for a short time (2-3 sec) and then release. This pin is pulled up to 2.9V in the GSM Modem.

In the shield, it is connected to digital pin 8 of Arduino via jumper J5. Shorting the jumper and removing R16 from board enables you to power on /off the modem by Arduino.

GSM RST using Arduino

RST pin of GSM modem is active low. In the shield, it is connected to digital pin 7 of Arduino via jumper J6. Short J6 and make the pin 7 HIGH to reset the modem.

GPS RST using Arduino

Reset pin of GPS is active low. In the shield, it is connected to digital pin 6 of Arduino via jumper J2. Short J2 and make the pin 6 HIGH to reset the GPS.

Audio Jacks

The Shield contains two audio stereo jacks on board. The first is the audio input jack (labeled “MIC”). This allows you to input audio from any device such as an MP3 player, or cellular phone using a basic audio cable. The second audio jack is the audio output, labeled “SPEAKER”. This jack allows you to route the audio out to a speaker.

Micro SD CardThe shield also has a micro SD card socket to add external storage to your project. It communicates with Arduino using SPI protocol. You can directly use Arduino SD library that is available with Arduino IDE. Note that the library uses pin4 as Slave select whereas the shield uses pin9 for slave select, so you have to change your program accordingly.

Getting StartedLets check out on getting started with this shield on Arduino. What would be the first thing you want to do with it? Send out GPS cordinates as text (SMS)?

Insert an activated SIM Card to the SIM Socket (K5), provided on the bottom side of the shield.
Also insert a microSD card in the SD card slot
Adjust the slide switch as per convenience
- USB – GSM modem communicates with the PC directly without an ATmega328 on your Uno,
- Arduino – GSM modem communicates with the ATmega328 on your Uno)
Copy the given code and paste it in a new sketch on your Arduino IDE. Compile and burn it to your Arduino
Before stacking the shield to your Arduino, let the SIM get registered to the network
When GPS modem gets fixed (3D LED turns off), you will receive the GPS cordinates of your location as text message and also the same will be written to SD card as text file

#include <SoftwareSerial.h>
#include <SPI.h>
#include <SD.h>

SoftwareSerial GPS(4,5);                             /* Software serial - RX, TX pins                           */
File Cordinates;

/*........................................ Variables declaration .............................................  */

char Rec_data;
char RMC_flag=0,comma=0,i=0,j=0;
char latitude[12],longitude[12];
int smsflag=0,stable=0,finish=0,snd=0;

/*............................................... Setup ....................................................... */

void setup() 
{
  Serial.begin(9600);                                /* Initialize serial communication at 9600 bits per second */
  GPS.begin(9600);                                   /* Initialize software serial at 9600 bps for GPS          */

  while (!SD.begin(9)) 
  {
    Serial.println("SD Card Initialization failed!");
    return;
  }
  Serial.println("SD Card Initialized");

  Serial.print("AT\r\n");                            /* Initialization command                                  */
  delay(1000); 
  Serial.print("ATE0\r\n");                          /* Turn echo off                                           */
  delay(1000);
  Serial.print("AT+CMGF=1\r\n");                     /* Text mode                                               */
  delay(1000); 
  Serial.print("AT+CNMI=2,1,0,0,0\r\n");             /* Set message format                                      */
  delay(1000);
}

/*...................................................Loop...................................................... */

void loop()
{
  if(smsflag==0 && finish==1 && snd==0)              /* Send message after storing GPS cordinates               */
  {
    Serial.print("AT+CMGS=\"+91xxxxxxxxxx\"\r\n");   /* Replace xxxxxxxxxx with a valid 10-digit mobile no:     */
    delay(1000); 
  }    

  if(smsflag==1 && finish==1 && snd==0)              /* Send the message                                        */
  {
    Serial.print("Latitude:");  
      Serial.print(latitude);                        /* Send latitude                                           */
    Serial.print("\r\n");
    Serial.print("Longitude:");
      Serial.print(longitude);                       /* Send longitude                                          */
    Serial.print('\x1A');                            /* Send Ctrl+Z after the message                           */

    Cordinates = SD.open("GPS.txt", FILE_WRITE);     /* Open the file GPS.txt to write cordinates               */

    if(Cordinates)                                   /* If the file opened okay, write to it                    */
    {
      Serial.print("Writing to GPS.txt...");
      Cordinates.print("Latitude:");
      Cordinates.println(latitude);                  /* Write latitude to the file                              */
      Cordinates.print("Longitude:");
      Cordinates.println(longitude);                 /* Write longitude to the file                             */
      Cordinates.close();                            /* Close the file                                          */
      Serial.println("done.");
    } 
    else
    {
      Serial.println("Error opening GPS.txt");       /* If the file didn't open, print an error                 */
    }

    Cordinates = SD.open("GPS.txt");                 /* Re-open the file for reading                            */
    if(Cordinates)
    {
      Serial.println("GPS.txt");
      while (Cordinates.available())                 /* Read from the file until there's nothing else in it     */
      {
        Serial.write(Cordinates.read());
      }
      Cordinates.close();                            /* Close the file                                          */

/*----------- Uncomment these lines if you want to delete the file ---------------------------------------------

      Serial.println("Removing GPS.txt...");
      SD.remove("GPS.txt");
      Serial.println("Removed GPS.txt...");

----------------------------------------------------------------------------------------------------------------*/
    } 
    else
    {
      Serial.println("Error opening GPS.txt");       /* If the file didn't open, print an error                 */
    }  

    i = 0;
    j = 0;
    RMC_flag = 0;
    comma = 0;                                       /* Clear the variables                                     */
    snd = 1;
    smsflag = 0;
    finish = 0;
    stable = 0;
  }

  while(GPS.available())                             /* Check if any data has arrived in software UART          */
  {
    Rec_data = GPS.read();                           /* Copy the received charactr to a variable                */

    if(Rec_data == 'G')                              /* Check for GPRMC header                                  */
    {
    RMC_flag = 1;
    }
    if(Rec_data == 'P' && RMC_flag==1)               /* Check for GPRMC header                                  */
    {
    RMC_flag = 2;
    }
    if(Rec_data == 'R' && RMC_flag==2)               /* Check for GPRMC header                                  */
    {                                                  
      RMC_flag = 3;
    }

    else if(Rec_data=='M' && RMC_flag==3) 
    {
      RMC_flag = 4;
    }

    else if(Rec_data=='C' && RMC_flag==4)
    { 
      RMC_flag = 5;
    }

    if(RMC_flag == 5)
    {
      if(Rec_data==',') 
         comma++;                                    /* If GPRMC header is received, count the no: of commas    */  

      if(comma==2 && Rec_data=='A')                  /* Check if GPS is stable                                  */
      {
         stable=1;
      }  

      else if(comma==2 && Rec_data=='V')
      {
         stable=0;
         comma=0;
         RMC_flag=0;
      }  

      else if(comma>=3 && comma<5 && Rec_data!=',' && stable==1)
      {   
        latitude[i++]=Rec_data;                      /* Store latitude in an array                              */
      }

      else if(comma>=5 && comma<7 && Rec_data!=',' && stable==1)
      {   
        longitude[j++]=Rec_data;                     /* Store longitude in an array                             */
      }

      if(Rec_data=='*' && stable==1)
      {
        comma=0; finish=1;
      }
    }
  } 

  while (Serial.available())                         /* Check if any data has arrived in hardware UART          */
  {
    Rec_data = Serial.read();                        /* Copy the received character to a variable               */
    if(Rec_data=='>')                                /* Set flag for response to "AT+CMGS=\"+91xxxxxxxxxx\""    */
    {
      smsflag = 1;
    } 
  }
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

#include <SoftwareSerial.h>

#include <SPI.h>

#include <SD.h>

SoftwareSerial GPS(4,5); /* Software serial - RX, TX pins */

File Cordinates;

/*........................................ Variables declaration ............................................. */

char Rec_data;

char RMC_flag=0,comma=0,i=0,j=0;

char latitude[12],longitude[12];

int smsflag=0,stable=0,finish=0,snd=0;

/*............................................... Setup ....................................................... */

void setup()

{

Serial.begin(9600); /* Initialize serial communication at 9600 bits per second */

GPS.begin(9600); /* Initialize software serial at 9600 bps for GPS */

while (!SD.begin(9))

{

Serial.println("SD Card Initialization failed!");

return;

}

Serial.println("SD Card Initialized");

Serial.print("AT\r\n"); /* Initialization command */

delay(1000);

Serial.print("ATE0\r\n"); /* Turn echo off */

delay(1000);

Serial.print("AT+CMGF=1\r\n"); /* Text mode */

delay(1000);

Serial.print("AT+CNMI=2,1,0,0,0\r\n"); /* Set message format */

delay(1000);

}

/*...................................................Loop...................................................... */

void loop()

{

if(smsflag==0 && finish==1 && snd==0) /* Send message after storing GPS cordinates */

{

Serial.print("AT+CMGS=\"+91xxxxxxxxxx\"\r\n"); /* Replace xxxxxxxxxx with a valid 10-digit mobile no: */

delay(1000);

}

if(smsflag==1 && finish==1 && snd==0) /* Send the message */

{

Serial.print("Latitude:");

Serial.print(latitude); /* Send latitude */

Serial.print("\r\n");

Serial.print("Longitude:");

Serial.print(longitude); /* Send longitude */

Serial.print('\x1A'); /* Send Ctrl+Z after the message */

Cordinates = SD.open("GPS.txt", FILE_WRITE); /* Open the file GPS.txt to write cordinates */

if(Cordinates) /* If the file opened okay, write to it */

{

Serial.print("Writing to GPS.txt...");

Cordinates.print("Latitude:");

Cordinates.println(latitude); /* Write latitude to the file */

Cordinates.print("Longitude:");

Cordinates.println(longitude); /* Write longitude to the file */

Cordinates.close(); /* Close the file */

Serial.println("done.");

}

else

{

Serial.println("Error opening GPS.txt"); /* If the file didn't open, print an error */

}

Cordinates = SD.open("GPS.txt"); /* Re-open the file for reading */

if(Cordinates)

{

Serial.println("GPS.txt");

while (Cordinates.available()) /* Read from the file until there's nothing else in it */

{

Serial.write(Cordinates.read());

}

Cordinates.close(); /* Close the file */

/*----------- Uncomment these lines if you want to delete the file ---------------------------------------------

Serial.println("Removing GPS.txt...");

SD.remove("GPS.txt");

Serial.println("Removed GPS.txt...");

----------------------------------------------------------------------------------------------------------------*/

}

else

{

Serial.println("Error opening GPS.txt"); /* If the file didn't open, print an error */

}

i = 0;

j = 0;

RMC_flag = 0;

comma = 0; /* Clear the variables */

snd = 1;

smsflag = 0;

finish = 0;

stable = 0;

}

while(GPS.available()) /* Check if any data has arrived in software UART */

{

Rec_data = GPS.read(); /* Copy the received charactr to a variable */

if(Rec_data == 'G') /* Check for GPRMC header */

{

RMC_flag = 1;

}

if(Rec_data == 'P' && RMC_flag==1) /* Check for GPRMC header */

{

RMC_flag = 2;

}

if(Rec_data == 'R' && RMC_flag==2) /* Check for GPRMC header */

{

RMC_flag = 3;

}

else if(Rec_data=='M' && RMC_flag==3)

{

RMC_flag = 4;

}

else if(Rec_data=='C' && RMC_flag==4)

{

RMC_flag = 5;

}

if(RMC_flag == 5)

{

if(Rec_data==',')

comma++; /* If GPRMC header is received, count the no: of commas */

if(comma==2 && Rec_data=='A') /* Check if GPS is stable */

{

stable=1;

}

else if(comma==2 && Rec_data=='V')

{

stable=0;

comma=0;

RMC_flag=0;

}

else if(comma>=3 && comma<5 && Rec_data!=',' && stable==1)

{

latitude[i++]=Rec_data; /* Store latitude in an array */

}

else if(comma>=5 && comma<7 && Rec_data!=',' && stable==1)

{

longitude[j++]=Rec_data; /* Store longitude in an array */

}

if(Rec_data=='*' && stable==1)

{

comma=0; finish=1;

}

while (Serial.available()) /* Check if any data has arrived in hardware UART */

{

Rec_data = Serial.read(); /* Copy the received character to a variable */

if(Rec_data=='>') /* Set flag for response to "AT+CMGS=\"+91xxxxxxxxxx\"" */

{

smsflag = 1;

}

*NOTE: Kindly note that the quad band variants of the shield comes with SIM900 and SIM800, whereas SIM900A is the dualband version. The Bluetooth connectivity and USB debug features are available on the SIM800 variant only. Certain features such as display interface, PWM output etc requires customization of the firmware.

Resources

Shop with us

27 Responses to "Familiarize with rhydolabz Tracking Shield (SIM800 / SIM900 / SIM900A)"

Anand says:

February 22, 2016 at 3:41 pm

Hey, I recently bought this shield. The GSM works fine, bu the GPS doesn’t give any output. the 3D LED keeps blinking… it doesn’t get fixed… or How do i fix it?

Thank you

Log in to Reply
1. Hari Krishnan says:
  
  April 22, 2016 at 4:48 pm
  
  Location of use is to be taken into account for.
  Works great in open sky.
  
  Log in to Reply
Abhishek TS says:

May 24, 2016 at 12:22 pm

Is the GSM modem connected to normal hardware serial pins on uno ?

Log in to Reply
1. Hari Krishnan says:
  
  May 24, 2016 at 4:34 pm
  
  Yes, the shield comes with a factory set connection to hardware serial pins of arduino UNO.
  
  Log in to Reply
Abhishek TS says:

May 24, 2016 at 12:26 pm

Is the 7-12 V connector on the shield required if the arduino is powered via DC Jack connector ?

Log in to Reply
1. Hari Krishnan says:
  
  May 24, 2016 at 4:29 pm
  
  If the arduino is powered via DC barrel jack connector, there is no need of connecting the 2 pin RMC connector on the GSM shield.
  Just make sure that the external power supply can power GSM shield & UNO.
  😀
  
  Log in to Reply
ANSUMAN says:

October 22, 2016 at 11:09 pm

SD Card Initialization failed! , when I trying to connect it MEGA 2560 BOARD.

Log in to Reply
1. Hari Krishnan says:
  
  November 12, 2016 at 1:26 pm
  
  This tracking Shield is not compatible with MEGA 2560 BOARD. Since,the SPI pins for Arduino Mega and Arduino Uno are different it is not possible to initialize SD card. You can refer the schematic of these two board.And also there are some limitation for using software serial in Arduino Mega. In our circuit we are using arduino pins 4,5 for GPS(software serial), which can’t be configured as serial software in Arduino Mega. For more reference please go through the link below
  https://www.arduino.cc/en/Reference/SoftwareSerial
  
  Log in to Reply
Viral Parmar says:

February 22, 2017 at 3:32 pm

SD Card Initialization failed!

I am using Arduino UNO.

Log in to Reply
1. Hari Krishnan says:
  
  February 25, 2017 at 12:03 pm
  
  SD Card Initialization failed! may be due to the improper insertion of SD card. Kindly re-insert your SD card.
  
  Log in to Reply
Arrvin says:

March 1, 2017 at 2:06 pm

I am not getting any gps lattitude and longitude location values. network leds are blinking correctly. in my sd card file also saved. but not getting any value.

Log in to Reply
1. Hari Krishnan says:
  
  May 10, 2017 at 9:58 am
  
  The GPS chipset will take some time to fix the module. Then only we get a valid GPS coordinates of your location from GPS. It can be understand from the status of 3D LED. 3D Blinks when GPS is not fixed, turns off when GPS is fixed.
  
  Log in to Reply
Naseef says:

March 2, 2017 at 10:36 pm

Can i connect this shield using jumper wires into arduino mega 2560?

Log in to Reply
1. Hari Krishnan says:
  
  March 14, 2017 at 12:28 pm
  
  Hi,
  The following pins of arduino are used for tracking shield. You can interface tracking shield to Arduino Mega by connecting jumper wire to the appropriate pins. However by removing certain jumpers some of these pins can be freed.
  
  Pin 0 –> Rx_H
  Pin 1 –> Tx_H . This 2 pins for GSM module.
  
  Pin 4 –> Rx_S
  Pin 5 ( Based on J5) –> Tx_S . This 2 pins for GPS module.
  
  Pin 6 ( Based on J2) –> GPS reset
  Pin 7 ( Based on J7) –> GSM Modem Reset
  Pin 8 ( Based on J8) –> PKEY. Modem restart
  
  Pin 9 –> Chip Select
  Pin 11 –> MOSI
  Pin12 –> MISO
  Pin 13 –> SCK SPI pins for SD card
  
  Log in to Reply
vikram says:

April 7, 2017 at 7:52 am

I recently bought Tracking Shield – GSM/GPRS/GPS (SIM900A). When I am trying to run the code as given above using arduino uno, I am getting
” Error while setting serial port parameters : 9,600 N 8 1 ” . Do I need to short the jumper J7 for the code to work?
Also can you please provide the code to implement GPS through hardware pins.
Please reply soon.

Log in to Reply
1. Hari Krishnan says:
  
  June 8, 2017 at 2:19 pm
  
  The baud rate selected at the serial monitor must match with the baud rate given in the code. GPS module communicates via software serial pins S-TX –D5 and S-RX – D4.
  Jumper J7, short to connect GPS RX to S-TX (D5) of Arduino. If you want to give some commands to GPS, you must short jumper J7. In this shield we implement GPS through soft UART.
  
  Log in to Reply
Pavan says:

May 10, 2017 at 12:13 pm

So I hooked up a 8ohm, 0.5w speaker directly to the speaker out pin and a small electret microphone to the mic in pin. While the mic seems to be working ok, the speaker can delivery a very tiny audio. I can barely hear the sound if I push the speaker near by ear. I tried setting AT+CLVL to 100 because I thought that decides the speaker volume.

What am I missing here? Can someone explain how to get a decent audio out from the board? I also tried hooking up a headset, but the volume is very low even with that.

Thanks,
Pavan

Log in to Reply
Shubhashree Dash says:

June 30, 2017 at 4:16 pm

Does sim card affects the shield’s GPS?

Log in to Reply
1. Hari Krishnan says:
  
  July 27, 2017 at 12:32 pm
  
  The SIM card have not affect the tracking shield’s GPS.
  
  Log in to Reply
Arrvin says:

January 29, 2018 at 3:03 pm

i need to send lattitude and longitude as sms to my phone….but it should send sms when the gps data updated in sim800..it should send sms automatically without opening serial monitor…is there any possible to send msg without opening serial monitor..

Log in to Reply
1. Kanchana says:
  
  March 23, 2018 at 9:18 pm
  
  Can you pls send the code.. we are also doing the same project . We get the latitude and longitude but not able to send SMS using GSM sim 900 module..
  Pls send me the code to this mail id
  
  Log in to Reply
Arrvin says:

January 29, 2018 at 4:14 pm

how to send and get response using AT command from sim800…how to receive response in serial monitor?

Log in to Reply
Mandar says:

March 29, 2018 at 1:58 am

The shield is not working properly.When I burn your given code on Uno it takes 30 mins to get the sms that to with incorrect location.

Log in to Reply
1. Hari Krishnan says:
  
  April 2, 2018 at 2:17 pm
  
  This is because of the GPS is not able to get the signal. So please place the module in the open space.
  
  Log in to Reply
2. Hari Krishnan says:
  
  May 9, 2018 at 11:07 am
  
  Please keep the GPS in open space and run the code .The code in our site send SMS after the GPS become stable.It may take time to become stable in closed space.
  
  Log in to Reply
swapnil patil says:

December 23, 2018 at 11:39 pm

Hi,

I have Just purchased SIM900, But Not able to send GET request

My Code is

#include /* Create object named SIM900 of the class SoftwareSerial */ SoftwareSerial SIM900(8, 7); void setup() { SIM900.begin(9600); /* Define baud rate for software serial communication */ Serial.begin(9600); /* Define baud rate for serial communication */ }
void loop() { Serial.println("HTTP get method :"); Serial.print("AT\\r\\n"); SIM900.println("AT"); /* Check Communication */ delay(5000); ShowSerialData(); /* Print response on the serial monitor */ delay(5000); /* Configure bearer profile 1 */ Serial.print("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"\\r\\n"); SIM900.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\""); /* Connection type GPRS */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+SAPBR=3,1,\"APN\",\"jionet\"\\r\\n"); SIM900.println("AT+SAPBR=3,1,\"APN\",\"jionet\""); /* APN of the provider */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+SAPBR=1,1\\r\\n"); SIM900.println("AT+SAPBR=1,1"); /* Open GPRS context */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+SAPBR=2,1\\r\\n"); SIM900.println("AT+SAPBR=2,1"); /* Query the GPRS context */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+HTTPINIT\\r\\n"); SIM900.println("AT+HTTPINIT"); /* Initialize HTTP service */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+HTTPPARA=\"CID\",1\\r\\n"); SIM900.println("AT+HTTPPARA=\"CID\",1"); /* Set parameters for HTTP session */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+HTTPPARA=\"URL\",\"api.thingspeak.com/channels/119922/feeds/last.txt\"\\r\\n"); SIM900.println("AT+HTTPPARA=\"URL\",\"api.thingspeak.com/channels/119922/feeds/last.txt\""); /* Set parameters for HTTP session */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+HTTPACTION=0\\r\\n"); SIM900.println("AT+HTTPACTION=0"); /* Start GET session */ delay(10000); ShowSerialData(); delay(10000); Serial.print("AT+HTTPREAD\\r\\n"); SIM900.println("AT+HTTPREAD"); /* Read data from HTTP server */ delay(8000); ShowSerialData(); delay(8000); Serial.print("AT+HTTPTERM\\r\\n"); SIM900.println("AT+HTTPTERM"); /* Terminate HTTP service */ delay(5000); ShowSerialData(); delay(5000); Serial.print("AT+SAPBR=0,1\\r\\n"); SIM900.println("AT+SAPBR=0,1"); /* Close GPRS context */ delay(5000); ShowSerialData(); delay(5000); } void ShowSerialData() {
while(SIM900.available()!=0){ /* If data is available on serial port */ Serial.println(char (SIM900.read())); /* Print character received on to the serial monitor */ Serial.println("asdasd"); } }

And My output was

HTTP get method : AT\r\nHTTP get method : AT\r\nAT+SAPBR=3,1,"CONTYPE","GPRS"\r\nAT+SAPBR=3,1,"APN","jionet"\r\nAT+SAPBR=1,1\r\nAT+SAPBR=2,1\r\nAT+HTTPINIT\r\nAT+HTTPPARA="CID",1\r\nAT+HTTPPARA="URL","api.thingspeak.com/channels/119922/feeds/last.txt"\r\nAT+HTTPACTION=0\r\nAT+HTTPREAD\r\nAT+HTTPTERM\r\nAT+SAPBR=0,1\r\nHTTP get method :

Please Help me to solve this

Log in to Reply
1. Hari Krishnan says:
  
  January 8, 2019 at 2:26 pm
  
  Check the HTTP status code after http action. With that status code we can find the problem
  Sim900 module will not support jio sim.Sim900 is a 2G modem.
  
  Log in to Reply

Leave a Reply Cancel reply