/* GSM Scan Networks This example prints out the IMEI number of the modem, then checks to see if it's connected to a carrier. If so, it prints the phone number associated with the card. Then it scans for nearby networks and prints out their signal strengths. Circuit: * GSM shield * SIM card Created 8 Mar 2012 by Tom Igoe, implemented by Javier Carazo Modified 4 Feb 2013 by Scott Fitzgerald http://www.arduino.cc/en/Tutorial/GSMToolsGsmScanNetworks This example code is part of the public domain */ // libraries #include <GSM.h> // PIN Number #define PINNUMBER "" // initialize the library instance GSM gsmAccess; // include a 'true' parameter to enable debugging GSMScanner scannerNetworks; GSMModem modemTest; // Save data variables String IMEI = ""; // serial monitor result messages String errortext = "ERROR"; 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("GSM networks scanner"); scannerNetworks.begin(); // connection state boolean notConnected = true; // Start GSM shield // If your SIM has PIN, pass it as a parameter of begin() in quotes while (notConnected) { if (gsmAccess.begin(PINNUMBER) == GSM_READY) { notConnected = false; } else { Serial.println("Not connected"); delay(1000); } } // get modem parameters // IMEI, modem unique identifier Serial.print("Modem IMEI: "); IMEI = modemTest.getIMEI(); IMEI.replace("\n", ""); if (IMEI != NULL) { Serial.println(IMEI); } } void loop() { // scan for existing networks, displays a list of networks Serial.println("Scanning available networks. May take some seconds."); Serial.println(scannerNetworks.readNetworks()); // currently connected carrier Serial.print("Current carrier: "); Serial.println(scannerNetworks.getCurrentCarrier()); // returns strength and ber // signal strength in 0-31 scale. 31 means power > 51dBm // BER is the Bit Error Rate. 0-7 scale. 99=not detectable Serial.print("Signal Strength: "); Serial.print(scannerNetworks.getSignalStrength()); Serial.println(" [0-31]"); }