110 lines
2.5 KiB
Arduino
110 lines
2.5 KiB
Arduino
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/*
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WiFiEsp example: ScanNetworks
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This example prints the Wifi shield's MAC address, and
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scans for available Wifi networks using the Wifi shield.
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Every ten seconds, it scans again. It doesn't actually
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connect to any network, so no encryption scheme is specified.
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For more details see: http://yaab-arduino.blogspot.com/p/wifiesp.html
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*/
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#include "WiFiEsp.h"
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// Emulate Serial1 on pins 6/7 if not present
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#ifndef HAVE_HWSERIAL1
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#include "SoftwareSerial.h"
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SoftwareSerial Serial1(6, 7); // RX, TX
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#endif
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void setup() {
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// initialize serial for debugging
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Serial.begin(115200);
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// initialize serial for ESP module
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Serial1.begin(9600);
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// initialize ESP module
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WiFi.init(&Serial1);
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// check for the presence of the shield
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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// don't continue
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while (true);
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}
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// Print WiFi MAC address
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printMacAddress();
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}
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void loop()
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{
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// scan for existing networks
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Serial.println();
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Serial.println("Scanning available networks...");
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listNetworks();
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delay(10000);
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}
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void printMacAddress()
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{
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// get your MAC address
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byte mac[6];
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WiFi.macAddress(mac);
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// print MAC address
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char buf[20];
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sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", mac[5], mac[4], mac[3], mac[2], mac[1], mac[0]);
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Serial.print("MAC address: ");
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Serial.println(buf);
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}
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void listNetworks()
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{
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// scan for nearby networks
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int numSsid = WiFi.scanNetworks();
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if (numSsid == -1) {
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Serial.println("Couldn't get a wifi connection");
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while (true);
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}
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// print the list of networks seen
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Serial.print("Number of available networks:");
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Serial.println(numSsid);
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// print the network number and name for each network found
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for (int thisNet = 0; thisNet < numSsid; thisNet++) {
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Serial.print(thisNet);
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Serial.print(") ");
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Serial.print(WiFi.SSID(thisNet));
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Serial.print("\tSignal: ");
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Serial.print(WiFi.RSSI(thisNet));
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Serial.print(" dBm");
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Serial.print("\tEncryption: ");
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printEncryptionType(WiFi.encryptionType(thisNet));
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}
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}
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void printEncryptionType(int thisType) {
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// read the encryption type and print out the name
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switch (thisType) {
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case ENC_TYPE_WEP:
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Serial.print("WEP");
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break;
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case ENC_TYPE_WPA_PSK:
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Serial.print("WPA_PSK");
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break;
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case ENC_TYPE_WPA2_PSK:
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Serial.print("WPA2_PSK");
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break;
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case ENC_TYPE_WPA_WPA2_PSK:
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Serial.print("WPA_WPA2_PSK");
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break;
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case ENC_TYPE_NONE:
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Serial.print("None");
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break;
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}
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Serial.println();
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}
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