iTead 3g shield with sending SMS issues

Projects Programming
1

Ok, long story to describe what I am trying to do and steps I have taken.

In Australia the 2G phone network is about to be closed so I have purchased the iTead 3g Shield. I am trying to set it up so that I can send SMSs.

I am running the Arduino IDE on Mac and have the 3G shield stacked on an Uno. Given the problems I have been having (see below), I have emulated a PC to try and see if my issue is due to a board that isn't working properly/faulty. With a USB cable to the Uno and a second USB cable to the 3G Shield, I can get a response from AT commands (i.e. AT = OK), I can also confirm that when I ring the shield in this configuration that the Serial Monitor acknowledges the ringing (RING) - i.e. the shield is in good condition. Of note, when I try and ring out from my shield when attached to the emulated PC, I get a NO CARRIER message.

However, on returning to the Mac, I am unable to get any response from any AT command.

Here is the code I am using:

#include <SoftwareSerial.h>
//#define rxPin 7
//#define txPin 6
#define power_pin 8
#define reset_pin 9

//SoftwareSerial mySerial(rxPin, txPin);

void setup()

{
  Serial.begin(9600);
  Serial.print("AT");
}

void loop()
{
  
}

When I open Serial Monitor, I see a repeated AT every 5 seconds, with no "OK" response afterwards.

I can confirm that the jumpers are set to rx =6 and tx = 7, that all the lights are on appropriately.

I have been unable to add "#include <GSM.h>" as this throws out an error on compiling. I cannot find GSM.h in the arduino library, nor can I find a .zip of this library to add to my IDE (I believe that GSM is part of the current IDE set of library's).

Can anyone suggest why this shield isn't responding to AT commands when connected to a Mac

Thanks

Irish

2

When I open Serial Monitor, I see a repeated AT every 5 seconds, with no "OK" response afterwards.

You have a hardware problem if setup() gets called over and over.

You have unrealistic expectations if you expect to use one serial port to talk to the PC and the GSM at the same time.

3

I am facing a problem in GSM interface.

There is an example code in Arduino IDE for sending and receiving data to/from a server using gprs.Can i use any other GSM modem instead of Arduino GSM Shield? Is this example code is mend for only Arduino GSM shield or for any GSM modem?

Thank You!

4

Can i use any other GSM modem instead of Arduino GSM Shield?

The Arduino library and the Arduino GSM shield go together. No other shield will work.