Add Pico W WiFi Scan example

examples/arduino-wifi-scan/src/main.cpp

@@ -0,0 +1,43 @@
+// Simple WiFi network scanner application
+// Released to the public domain in 2022 by Earle F. Philhower, III
+#include <Arduino.h>
+#include <WiFi.h>
+
+void setup() {
+  Serial.begin(115200);
+}
+
+const char *macToString(uint8_t mac[6]) {
+  static char s[20];
+  sprintf(s, "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+  return s;
+}
+
+const char *encToString(uint8_t enc) {
+  switch (enc) {
+    case ENC_TYPE_NONE: return "NONE";
+    case ENC_TYPE_TKIP: return "WPA";
+    case ENC_TYPE_CCMP: return "WPA2";
+    case ENC_TYPE_AUTO: return "AUTO";
+  }
+  return "UNKN";
+}
+
+void loop() {
+  delay(5000);
+  Serial.printf("Beginning scan at %d\n", millis());
+  auto cnt = WiFi.scanNetworks();
+  if (!cnt) {
+    Serial.printf("No networks found\n");
+  } else {
+    Serial.printf("Found %d networks\n\n", cnt);
+    Serial.printf("%32s %5s %17s %2s %4s\n", "SSID", "ENC", "BSSID        ", "CH", "RSSI");
+    for (auto i = 0; i < cnt; i++) {
+      uint8_t bssid[6];
+      WiFi.BSSID(i, bssid);
+      Serial.printf("%32s %5s %17s %2d %4d\n", WiFi.SSID(i), encToString(WiFi.encryptionType(i)), macToString(bssid), WiFi.channel(i), WiFi.RSSI(i));
+    }
+  }
+  Serial.printf("\n--- Sleeping ---\n\n\n");
+  delay(5000);
+}