Tutorial.ScanNetworks History

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April 11, 2013, at 07:40 PM by Federico -
Changed lines 33-117 from:
(:source lang=arduino tabwidth=4:)
/*

This example prints the Wifi shield's MAC address, and
scans for available Wifi networks using the Wifi shield.
Every ten seconds, it scans again. It doesn't actually
connect to any network, so no encryption scheme is specified.

Circuit:
* WiFi shield attached

created 13 July 2010
by dlf (Metodo2 srl)
modified 22 April 2012
by Tom Igoe
*/


#include <SPI.h>
#include <WiFi.h>

void setup() {
// initialize serial and wait for the port to open:
Serial.begin(9600);

// attempt to connect using WEP encryption:
Serial.println("Initializing Wifi...");
printMacAddress();

// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}

void loop() {
delay(10000);
// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}

void printMacAddress() {
// the MAC address of your Wifi shield
byte mac[6];

// print your MAC address:
WiFi.macAddress(mac);
Serial.print("MAC: ");
Serial.print(mac[5],HEX);
Serial.print(":");
Serial.print(mac[4],HEX);
Serial.print(":");
Serial.print(mac[3],HEX);
Serial.print(":");
Serial.print(mac[2],HEX);
Serial.print(":");
Serial.print(mac[1],HEX);
Serial.print(":");
Serial.println(mac[0],HEX);
}

void listNetworks() {
// scan for nearby networks:
Serial.println("** Scan Networks **");
byte numSsid = WiFi.scanNetworks();

// print the list of networks seen:
Serial.print("number of available networks:");
Serial.println(numSsid);

// print the network number and name for each network found:
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
Serial.print(thisNet);
Serial.print(") ");
Serial.print(WiFi.SSID(thisNet));
Serial.print("\tSignal: ");
Serial.print(WiFi.RSSI(thisNet));
Serial.print(" dBm");
Serial.print("\tEncryption: ");
Serial.println(WiFi.encryptionType(thisNet));
}
}


(:sourccend:)
to:
(:source http://arduino.cc/en/pub/code/master/libraries/WiFi/examples/ScanNetworks/ScanNetworks.ino lang=arduino tabwidth=4:)
July 31, 2012, at 11:00 PM by Scott Fitzgerald -
Changed lines 33-117 from:
(:source http://arduino.cc/en/pub/code/master/libraries/WiFi/examples/ScanNetworks/ScanNetworks.ino lang=arduino tabwidth=4:)
to:
(:source lang=arduino tabwidth=4:)
/*

This example prints the Wifi shield's MAC address, and
scans for available Wifi networks using the Wifi shield.
Every ten seconds, it scans again. It doesn't actually
connect to any network, so no encryption scheme is specified.

Circuit:
* WiFi shield attached

created 13 July 2010
by dlf (Metodo2 srl)
modified 22 April 2012
by Tom Igoe
*/


#include <SPI.h>
#include <WiFi.h>

void setup() {
// initialize serial and wait for the port to open:
Serial.begin(9600);

// attempt to connect using WEP encryption:
Serial.println("Initializing Wifi...");
printMacAddress();

// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}

void loop() {
delay(10000);
// scan for existing networks:
Serial.println("Scanning available networks...");
listNetworks();
}

void printMacAddress() {
// the MAC address of your Wifi shield
byte mac[6];

// print your MAC address:
WiFi.macAddress(mac);
Serial.print("MAC: ");
Serial.print(mac[5],HEX);
Serial.print(":");
Serial.print(mac[4],HEX);
Serial.print(":");
Serial.print(mac[3],HEX);
Serial.print(":");
Serial.print(mac[2],HEX);
Serial.print(":");
Serial.print(mac[1],HEX);
Serial.print(":");
Serial.println(mac[0],HEX);
}

void listNetworks() {
// scan for nearby networks:
Serial.println("** Scan Networks **");
byte numSsid = WiFi.scanNetworks();

// print the list of networks seen:
Serial.print("number of available networks:");
Serial.println(numSsid);

// print the network number and name for each network found:
for (int thisNet = 0; thisNet<numSsid; thisNet++) {
Serial.print(thisNet);
Serial.print(") ");
Serial.print(WiFi.SSID(thisNet));
Serial.print("\tSignal: ");
Serial.print(WiFi.RSSI(thisNet));
Serial.print(" dBm");
Serial.print("\tEncryption: ");
Serial.println(WiFi.encryptionType(thisNet));
}
}


(:sourccend:)
April 25, 2012, at 06:22 PM by Scott Fitzgerald -
Changed lines 20-21 from:
%height=300px%[[Attach:EthernetShield_bb.png | Attach:EthernetShield_bb.png]]
to:
%height=300px%[[Attach:WiFiShield_bb.png | Attach:WiFiShield_bb.png]]
Changed lines 28-32 from:
!!!Schematic
(:div class=circuit :)
%height=300px%[[Attach:EthernetShield_sch.png | Attach:EthernetShield_sch.png]]
(:divend:)
to:

April 21, 2012, at 12:12 AM by Scott Fitzgerald -
Added lines 1-41:
''Examples > WiFi Library''

!!!Connect With WPA

This example scans for 802.11b/g networks with the Arduino WiFi shield. Your Arduino's serial monitor will print out information about the board and the networks it can see. It will not connect to a network.

(:div class=BOM :)
!!!Hardware Required
* Arduino WiFi Shield
* Shield-compatible Arduino board
(:divend:)

!!!Circuit
(:div class=circuit :)

The WiFi shield uses pins 10, 11, 12, and 13 for the SPI connection to the HDG104 module. Digital pin 4 is used to control the slave select pin on the SD card.

Open your serial monitor to view the networks the WiFi shield can see. The Arduino may not see as many networks as your computer.

%height=300px%[[Attach:EthernetShield_bb.png | Attach:EthernetShield_bb.png]]

[-image developed using [[http://www.fritzing.org |Fritzing]]. For more circuit examples, see the [[http://fritzing.org/projects/|Fritzing project page]] -]

'''''In the above image, the Arduino would be stacked below the WiFi shield.'''''

(:divend:)

!!!Schematic
(:div class=circuit :)
%height=300px%[[Attach:EthernetShield_sch.png | Attach:EthernetShield_sch.png]]
(:divend:)

'''Code:'''

(:div class=code :)
(:source http://arduino.cc/en/pub/code/master/libraries/WiFi/examples/ScanNetworks/ScanNetworks.ino lang=arduino tabwidth=4:)
(:divend:)


!!!See Also:
(:include WiFiTutorialSeeAlsoInclude:)

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