beaconer.ino

#include <ESP8266WiFi.h>

#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

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

#define BME_SCK 5
#define BME_MISO 2
#define BME_MOSI 4
#define BME_CS 0
#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI

String alfa = "1234567890";
byte channel = 6;
uint8_t beacon_interval = 10;

// Beacon Packet buffer
uint8_t packet[128] = { 0x80, 0x00, 0x00, 0x00,  /* Frame Control*/
                /*4*/   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* Duration */
                /*10*/  0x01, 0x02, 0x03, 0x04, 0x05, 0x06, /* DA */
                /*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); 

  wifi_set_channel(channel);

  // Randomize SRC MAC
  packet[10] = packet[16] = 0xBE;
  packet[11] = packet[17] = 0xEF;
  packet[12] = packet[18] = 0x00;
  packet[13] = packet[19] = random(256);
  packet[14] = packet[20] = random(256);
  packet[15] = packet[21] = random(256);


  Serial.begin(115200);
  Serial.println("BME280 test");
  Serial.println();

  bool status;
  // default settings
  status = bme.begin();
  if (!status) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }
}



void loop() {
    String TEMP_F = String((int)(bme.readTemperature() * 1.8 + 32));
//    Serial.print("Temperature = ");
//    Serial.print(TEMP_F);
//    Serial.println("*F");
  
    // Randomize SSID (Fixed size 6. Lazy right?)
    packet[38] = '!';
    packet[39] = ' ';
    packet[40] = TEMP_F[0];
    packet[41] = TEMP_F[1];
    packet[42] = '*';
    packet[43] = 'F';
    
    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(beacon_interval);
}