rename the wifiscan directory

wifiscan/src/CMakeLists.txt

@@ -0,0 +1 @@
+idf_component_register(SRCS "main.cpp")

wifiscan/src/main.cpp

@@ -0,0 +1,75 @@
+/* WiFi scan Example
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+#include <stdio.h>
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include "sdkconfig.h"
+#include <Arduino.h>
+#include <WiFi.h>
+
+void wifiScan() {
+    // WiFi.scanNetworks will return the number of networks found
+    int n = WiFi.scanNetworks();
+    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));
+            Serial.print(")");
+            Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
+            delay(10);
+        }
+    }
+    Serial.println("");
+}
+
+#if !CONFIG_AUTOSTART_ARDUINO
+void arduinoTask(void *pvParameter) {
+    // Set WiFi to station mode and disconnect from an AP if it was previously connected
+    WiFi.mode(WIFI_STA);
+    WiFi.disconnect();
+    Serial.begin(115200);
+    delay(100);
+
+    while(1) {
+        wifiScan();
+
+        // Wait a bit before scanning again
+        delay(5000);
+    }
+}
+
+void app_main()
+{
+    // initialize arduino library before we start the tasks
+    initArduino();
+
+    xTaskCreate(&arduinoTask, "arduino_task", configMINIMAL_STACK_SIZE, NULL, 5, NULL);
+}
+#else
+void setup() {
+    // Set WiFi to station mode and disconnect from an AP if it was previously connected
+    WiFi.mode(WIFI_STA);
+    WiFi.disconnect();
+    Serial.begin(115200);
+    delay(100);
+}
+
+void loop() {
+    wifiScan();
+    // Wait a bit before scanning again
+    delay(5000);
+}
+#endif