WiFiS.ino

/**
* Scan networks and print in screen
*/

#include "WiFi.h"
#include "HT_SSD1306Wire.h"

#define BAUDRATE 115200

// addr , freq , i2c group , resolution , rst
SSD1306Wire display(0x3c, 500000, SDA_OLED, SCL_OLED, GEOMETRY_128_64, RST_OLED);

void VextON(void) {
  pinMode(Vext, OUTPUT);
  digitalWrite(Vext, LOW);
}

void setup() {
    Serial.begin(BAUDRATE);

    // Set WiFi to station mode and disconnect from an AP if it was previously connected
    WiFi.mode(WIFI_STA);
    WiFi.disconnect();
    delay(100);

    VextON();
}

void loop() {
    Serial.println("Loooooop");

    display.init();
    display.setFont(ArialMT_Plain_10);
    display.setTextAlignment(TEXT_ALIGN_LEFT);

    display.drawString(0, 0, "Scanning networks...");

    // WiFi.scanNetworks will return the number of networks found
    int networksFound = WiFi.scanNetworks();

    if (networksFound == 0) {
        display.drawString(0, 0, "No networks found");
        display.display();
        delay(500);
        return;
    }

    display.drawString(0, 0, String(networksFound) + " networks found:");
    display.display();
    // Reset screen as we will write in 0
    display.init();

    int textPosition = 0;
    for (int network = 0; network < networksFound; ++network) {
        // Solo podemos mostrar 5
        if (network % 5 == 0) {
            delay(1000);
            // Limpiamos
            display.init();
            display.setFont(ArialMT_Plain_10);
            display.setTextAlignment(TEXT_ALIGN_LEFT);
            textPosition = 0;
        }

        bool isEncrypted = WiFi.encryptionType(network) == WIFI_AUTH_OPEN;
        String encryptionInfo = isEncrypted ? "" : "*";
        String wifiInfo = WiFi.SSID(network) + ": (" + WiFi.RSSI(network) + ") " + encryptionInfo;
        display.drawString(0, textPosition, wifiInfo);
        textPosition = textPosition + 10;
        display.display();
        delay(1000);
    }

    // Wait a bit before scanning again
    delay(3000);
}