ESP8266+OLED12864简单WiFi扫描器

Ady ·

更新时间:2024-09-21

· 701 次阅读

实现功能

ESP8266将扫描到的WiFi按信号强度显示在OLED屏幕上

硬件准备

ESP8266:NodeMCU WiFi
OLED:1.3’ 控制芯片：SH1106

软件准备

Arduino IDE
U8g2lib

连线

GND - 地
VCC - 3.3v
OLED SCK - GPIO 14 （NodeMCU D5）
OLED MOSI - GPIO 13（NodeMCU D7）
OLED CS - GPIO 15 （NodeMCU D8）
OLED DC - GPIO 2 (NodeMCU D4)
连线图

程序

/*
WiFiScannerOLED.ino -- A simple ESP8266 network scanner.
Scan result will be displayed on OLDE12864.
Written by CNflysky 20.3.10
*/
#include
#include
//OLED12864 constructor;if you are using another display,change it here.
U8G2_SH1106_128X64_NONAME_F_4W_SW_SPI u8g2(U8G2_R0,14,13,15,2,U8X8_PIN_NONE);
void setup() {
  u8g2.begin();
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
}
struct wifis_t {
  String ssid;
  String encryption;
  int rssi;
};
struct wifis_t *getWiFisInfo(int count){
  wifis_t *wifis=new wifis_t[count];
  wifis_t switcher;
    for(int i=0;i<count;++i){
      wifis[i].ssid=WiFi.SSID(i);
      wifis[i].rssi=WiFi.RSSI(i);
      switch(WiFi.encryptionType(i)){
        case ENC_TYPE_NONE:
          wifis[i].encryption="Open";
          break;
        case ENC_TYPE_WEP:
          wifis[i].encryption="WEP";
          break;
        case ENC_TYPE_TKIP:
          wifis[i].encryption="WPA";
          break;
        case ENC_TYPE_CCMP:
          wifis[i].encryption="WPA2";
          break;
        case ENC_TYPE_AUTO:
          wifis[i].encryption="WPA/WPA2";
          break;
        }
      }
      for(int i=0;i<count;i++){
        for(int j=0;j<count;j++){
          if(wifis[i].rssi*-1<wifis[j].rssi*-1){
            switcher=wifis[i];
            wifis[i]=wifis[j];
            wifis[j]=switcher;
            }
          }
        }
      return wifis;
}
void displaySSIDs(int count,wifis_t *wifis){
 u8g2.setFont(u8g2_font_5x7_tr);
 int y=u8g2.getMaxCharHeight();
 for(int i=0;i0){
    wifis_t *wifis=getWiFisInfo(ssids);
    u8g2.clearBuffer();
    displaySSIDs(ssids,wifis);
    u8g2.sendBuffer();
    delete [] wifis;
  }else{
    u8g2.clearBuffer();
    u8g2.setFont(u8g2_font_5x7_tr);
    u8g2.drawStr(0,u8g2.getMaxCharHeight(),"No WiFi Found");
    u8g2.sendBuffer();
    }
}

成果图

扫描到的SSID，RSSI和加密方式