Arduino SIM900 Modem Test
Port open
Starting modem test...modem.begin() succeeded
Checking IMEI...Modem's IMEI:
013226008448231
Resetting modem...Modem is functoning properly
/*
This example tests to see if the modem of the
GSM shield is working correctly. You do not need
a SIM card for this example.
Circuit:
* GSM shield attached
Created 12 Jun 2012
by David del Peral
modified 21 Nov 2012
by Tom Igoe
http://arduino.cc/en/Tutorial/GSMToolsTestModem
This sample code is part of the public domain
*/
// libraries
#include <GSM.h>
// modem verification object
GSMModem modem;
// IMEI variable
String IMEI = "";
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
}
// start modem test (reset and check response)
Serial.print("Starting modem test...");
if (modem.begin())
Serial.println("modem.begin() succeeded");
else
Serial.println("ERROR, no modem answer.");
}
void loop()
{
// get modem IMEI
Serial.print("Checking IMEI...");
IMEI = modem.getIMEI();
// check IMEI response
if (IMEI != NULL)
{
// show IMEI in serial monitor
Serial.println("Modem's IMEI: " + IMEI);
// reset modem to check booting:
Serial.print("Resetting modem...");
modem.begin();
// get and check IMEI one more time
if (modem.getIMEI() != NULL)
{
Serial.println("Modem is functoning properly");
}
else
{
Serial.println("Error: getIMEI() failed after modem.begin()");
}
}
else
{
Serial.println("Error: Could not get IMEI");
}
// do nothing:
while (true);
}