https://gist.github.com/clive520/d14f2c26c1cce8e4a521ab5949c2cc57
#include "WiFi.h"
void setup()
{
Serial.begin(9600);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
Serial.println("Setup done");
}
void loop()
{
Serial.println("scan start");
int n = WiFi.scanNetworks(); //可用的SSID數量
Serial.println("scan done");
if (n == 0) {
Serial.println("no networks found");
} else {
Serial.print(n);
Serial.println(" networks found");
for (int i = 0; i < n; ++i) {
// Print SSID and RSSI for each network found
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));//訊號強度
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*"); //是否有密碼
delay(10);
}
}
Serial.println("");
delay(5000);
}
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