Now that everything is wired up, it's time for the code.
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
extern "C" {
#include<user_interface.h>
}
int connectedClients = 0;
long nextCheck = 0; //Keeps track of the value of millis to only check for new Clients every 5 seconds.
Adafruit_SSD1306 display = Adafruit_SSD1306();
/* configuration wifi */
const char *ssid = "MAC Finder";
const char *password = "";
#if defined(ESP8266)
#define BUTTON_A 0
#define BUTTON_B 16
#define BUTTON_C 2
#define LED 0
#endif
#if (SSD1306_LCDHEIGHT != 32)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
void setup() {
delay(1000);
//Initialize the display
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C (for the 128x32)
display.setRotation(2);
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.clearDisplay();
initializeAP(); //Setup the Huzzah as an access point
}
void initializeAP() {
WiFi.softAP(ssid, password);
//I've noticed that most times the huzzah doesn't let clients connect
//as soon as it starts up. Here I give it 5 seconds to "warm up"
//While it does this it prints
display.clearDisplay();
display.display();
display.setTextSize(1);
display.setCursor(0,0);
display.print("Initializing AP");
//The two bytes that define the bitmap for the loading dots
static const unsigned char PROGMEM waiting_dot[] =
{ B00011000,
B00011000 };
for (int i = 0; i < 10; i++) {
display.drawBitmap(i * 10, 20, waiting_dot, 8, 2, WHITE);
display.display();
delay(1000);
}
display.clearDisplay();
display.display();
display.setCursor(0,0);
displaySSID();
}
void loop() {
if (millis() >= nextCheck) {
client_status();
nextCheck = millis() + 5000;
}
}
void displaySSID() {
display.setTextSize(1);
display.clearDisplay();
display.setCursor(0,0);
display.print("AP SSID: ");
display.setTextSize(2);
display.setCursor(0, 10);
display.println(ssid);
display.display();
}
void client_status() {
unsigned char number_client;
struct station_info *stat_info;
struct ip_addr *IPaddress;
IPAddress address;
int i=1;
number_client= wifi_softap_get_station_num(); // Count of stations which are connected to ESP8266 soft-AP
stat_info = wifi_softap_get_station_info();
if (number_client > connectedClients) {
display.setTextSize(1);
display.clearDisplay();
display.setCursor(0, 0);
display.setTextSize(1);
display.print("Client Connected!");
display.display();
delay(2000);
}
if (number_client < connectedClients) {
display.setTextSize(1);
display.clearDisplay();
display.setCursor(0, 0);
display.setTextSize(1);
display.print("Client Disconnected!");
display.display();
delay(2000);
if (number_client == 0) {
displaySSID();
}
}
connectedClients = number_client;
while (stat_info != NULL) {
display.clearDisplay();
display.setCursor(0, 0);
display.setTextSize(1);
display.print("Client MAC:");
display.setCursor(0, 10);
//Get the 6 octets of the client MAC address. Check to see if the value of each octet is less than
//0xF. If it is we will print a leading 0 to avoid any confusion.
if (stat_info->bssid[0] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[0],HEX);
display.print(":");
if (stat_info->bssid[1] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[1],HEX);
display.print(":");
if (stat_info->bssid[2] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[2],HEX);
display.print(":");
if (stat_info->bssid[3] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[3],HEX);
display.print(":");
if (stat_info->bssid[4] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[4],HEX);
display.print(":");
if (stat_info->bssid[5] <= 0xF) {
display.print("0");
}
display.print(stat_info->bssid[5],HEX);
display.display();
stat_info = STAILQ_NEXT(stat_info, next);
i++;
}
}
Upload the code to the Feather Huzzah and test it out. Once you verify it works it's time to put everything together.
