I am using an Arduino Mega and an Arduino GSM shield. I am using the receive SMS example under GSM in the Arduino IDE. My GSM shield's hardware IP is set correctly.
Here is the sketch:
/* SMS receiver This sketch, for the Arduino GSM shield, waits for a SMS message and displays it through the Serial port. Circuit: * GSM shield attached to and Arduino * SIM card that can receive SMS messages created 25 Feb 2012 by Javier Zorzano / TD This example is in the public domain. http://arduino.cc/en/Tutorial/GSMExamplesReceiveSMS */ // include the GSM library #include <GSM.h> // PIN Number for the SIM #define PINNUMBER "" // initialize the library instances GSM gsmAccess; GSM_SMS sms; // Array to hold the number a SMS is retreived from char senderNumber[20]; void setup() { // initialize serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } Serial.println("SMS Messages Receiver"); // connection state boolean notConnected = true; // Start GSM connection while (notConnected) { if (gsmAccess.begin(PINNUMBER) == GSM_READY) notConnected = false; else { Serial.println("Not connected"); delay(1000); } } Serial.println("GSM initialized"); Serial.println("Waiting for messages"); } void loop() { char c; // If there are any SMSs available() if (sms.available()) { Serial.println("Message received from:"); // Get remote number sms.remoteNumber(senderNumber, 20); Serial.println(senderNumber); // An example of message disposal // Any messages starting with # should be discarded if (sms.peek() == '#') { Serial.println("Discarded SMS"); sms.flush(); } // Read message bytes and print them while (c = sms.read()) Serial.print(c); Serial.println("\nEND OF MESSAGE"); // Delete message from modem memory sms.flush(); Serial.println("MESSAGE DELETED"); } delay(1000); } The issue is this line:
if (gsmAccess.begin(PINNUMBER) == GSM_READY) The serial monitor outputs everything until that line.
It just never gets past it, so I assume it cannot connect? The SIM has no pin code: I have tried it with my phone. The SIM has full signal strength when in my phone. I have tried my other SIM card also but the same thing happens.
This seem to be the same question, yet no answer: http://forum.arduino.cc/index.php?topic=270551.0
