mycorerepository/Arduino Code/Test/OLED-Wifi/OLED-Wifi.ino

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <ArduinoJson.h>

 
Adafruit_SSD1306 display = Adafruit_SSD1306();

#define BUTTON_A 0
#define BUTTON_B 16
#define BUTTON_C 2
#define LED      0

const char* ssid = "ESP8266 - TEST";
const char* password = "Coconuts08";


/*const char* ssid = "ESP8266";
const char* password = "password";*/

const char* host = "192.168.101.18";

ESP8266WebServer server(80);

const int Led = 14;

 
#if (SSD1306_LCDHEIGHT != 32)
 #error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
 
void setup() { 
  pinMode(Led, OUTPUT); 
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.println("");
  digitalWrite(Led, LOW);

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  String IP = WiFi.localIP()+"";
  digitalWrite(Led, HIGH);

  if (MDNS.begin("esp8266")) {
    Serial.println("MDNS responder started");
  }

  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 128x32)
  // init done
  
  // Show image buffer on the display hardware.
  // Since the buffer is intialized with an Adafruit splashscreen
  // internally, this will display the splashscreen.
  display.display();
  delay(1000);
 
  // Clear the buffer.
  display.clearDisplay();
  display.display();
  
  Serial.println("IO test");
 
  pinMode(BUTTON_A, INPUT_PULLUP);
  pinMode(BUTTON_B, INPUT_PULLUP);
  pinMode(BUTTON_C, INPUT_PULLUP);
 
  // text display tests
  display.setTextSize(1);
  display.setTextColor(WHITE);  
}
 
 
void loop() {

 /* if (! digitalRead(BUTTON_A)) display.print("A");
  if (! digitalRead(BUTTON_B)) display.print("B");
  if (! digitalRead(BUTTON_C)) display.print("C");
  delay(10);
  yield();
  display.display();*/

if(WiFi.status() != WL_CONNECTED){
  digitalWrite(Led, LOW);
  Serial.println("Trying to reconnect !");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Connected !");
}else{
  if(digitalRead(Led)==LOW){
         digitalWrite(Led, HIGH);
  }

  if(!digitalRead(BUTTON_A)){
    display.clearDisplay();
    display.setCursor(0,0);
    display.println("Connect to hum sensor");
    display.println("");

  WiFiClient client;
  const int httpPort = 80;
  if (!client.connect(host, httpPort)) {
    Serial.println("connection failed");
    digitalWrite(Led, LOW);
    return;
  }

  String urlTemp = "/temp";
  Serial.print("Requesting URL: ");
 
  client.print(String("GET ") + urlTemp + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" + 
                 "Connection: close\r\n\r\n");

  String json = "";
  boolean httpBody = false;
 // while (client.available()) {
    String line = client.readStringUntil('\r');
    Serial.println(line);
    if (!httpBody && line.charAt(1) == '{') {
      httpBody = true;
    }
    if (httpBody) {
      json += line;
    }
  //}
  StaticJsonBuffer<200> jsonBuffer;
  Serial.println("Got data:");
  Serial.println(json);
  JsonObject& root = jsonBuffer.parseObject(json);
  String temp = root["temperature"];
  String hum = root["humidity"];
  Serial.println("Temperature :"+temp);
  Serial.println("Humidity :"+hum);

  display.println("Temp: "+temp+"C - Hum: "+hum+"%");
  
  
  display.display();

  }
  
  }
}