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WiFi Scan.ino
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WiFi Scan.ino
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#include <LiquidCrystal_I2C.h>
#include <ESP8266WiFi.h>
int totalColumns = 16;
int totalRows = 2;
LiquidCrystal_I2C lcd(0x27, totalColumns, totalRows);
void scrollMessage(int row, String message, int delayTime, int totalColumns) {
for (int i=0; i < totalColumns; i++) {
message = " " + message;
}
message = message + " ";
for (int position = 0; position < message.length(); position++) {
lcd.setCursor(0, row);
lcd.print(message.substring(position, position + totalColumns));
delay(delayTime);
}
}
int signal_dBM[] = { -100, -99, -98, -97, -96, -95, -94, -93, -92, -91, -90, -89, -88, -87, -86, -85, -84, -83, -82, -81, -80, -79, -78, -77, -76, -75, -74, -73, -72, -71, -70, -69, -68, -67, -66, -65, -64, -63, -62, -61, -60, -59, -58, -57, -56, -55, -54, -53, -52, -51, -50, -49, -48, -47, -46, -45, -44, -43, -42, -41, -40, -39, -38, -37, -36, -35, -34, -33, -32, -31, -30, -29, -28, -27, -26, -25, -24, -23, -22, -21, -20, -19, -18, -17, -16, -15, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1};
int signal_percent[] = {0, 0, 0, 0, 0, 0, 4, 6, 8, 11, 13, 15, 17, 19, 21, 23, 26, 28, 30, 32, 34, 35, 37, 39, 41, 43, 45, 46, 48, 50, 52, 53, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 69, 71, 72, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 90, 91, 92, 93, 93, 94, 95, 95, 96, 96, 97, 97, 98, 98, 99, 99, 99, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100};
int strength =0;
int percentage =0;
void setup(){
lcd.init();
lcd.backlight();
Serial.begin(115200);
Serial.println("");
// Set WiFi to station mode and disconnect from an AP if it was previously connected
WiFi.mode(WIFI_STA);
WiFi.disconnect(); //ESP has tendency to store old SSID and PASSword and tries to connect
delay(100);
Serial.println("WiFi Network Scan Started");
}
void loop(){
int n = WiFi.scanNetworks();
Serial.println("Scan done");
if (n == 0){
Serial.println("No Networks Found");
lcd.setCursor(0, 0);
lcd.print("No Networks Found");}
else
{
lcd.setCursor(0, 0);
lcd.print(n);
lcd.println(" Networks found");
String message,adder;
message="";
for (int i = 0; i < n; ++i)
{
// Print SSID and RSSI for each network found
// SSID - Servece Set Identifier - Network name
// RSSI - Received Signal Strength Indicator
Serial.print(": ");
Serial.print(i + 1); //Sr. No
Serial.print(" (");
Serial.print(WiFi.SSID(i));
adder=WiFi.SSID(i);
message.concat(adder);
message.concat("---");
strength =WiFi.RSSI(i);
Serial.print(" - ");
for (int x = 0; x < 100; x = x + 1) {
if (signal_dBM[x] == strength) {
// Print the received signal strength in percentage
percentage = signal_percent[x];
Serial.print(percentage);
Serial.print("%");
break;
}
}
Serial.print(") MAC:");
Serial.print(WiFi.BSSIDstr(i));
Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" Unsecured":" Secured");
delay(10);
}
scrollMessage(1, message, 400, totalColumns);
}
Serial.println("");
// Wait a bit before starting New scanning again
}