test_wifi.cpp

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// Copyright 2023 Myron Rodrigues
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#include "WiFi.h"
#include "secrets.h"
 
#define CHECK_NWS_TEST 0
 
void initWiFi()
{
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  Serial.print("Connecting to WiFi ..");
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print('.');
    delay(1000);
  }
  Serial.println(WiFi.localIP());
}
 
void setup()
{
  Serial.begin(115200);
 
  if (CHECK_NWS_TEST) {
    // Set WiFi to station mode and disconnect from an AP if it was previously connected
    WiFi.mode(WIFI_STA);
    WiFi.disconnect();
    delay(100);
  } else {
    initWiFi();
  }
 
  Serial.println("Setup done");
}
 
void loop()
{
  if (CHECK_NWS_TEST) {
    Serial.println("scan start");
 
    // WiFi.scanNetworks will return the number of networks found
    // 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("");
  } else {
    Serial.println("Wifi connected");
  }
 
  // Wait a bit before scanning again
  delay(5000);
}