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• Arduino code for the ESP

  davedarko • 06/28/2017 at 10:08 • 0 comments

  (OTA doesn't work with current chip)

  #include <ESP8266WiFi.h>
  #include <ESP8266mDNS.h>
  #include <WiFiUdp.h>
  #include <ArduinoOTA.h>
  #include <Wire.h> 
  #include <LiquidCrystal_I2C.h>
  LiquidCrystal_I2C lcd[8] = {
    LiquidCrystal_I2C(0x27, 16, 2),
    LiquidCrystal_I2C(0x26, 16, 2),
    LiquidCrystal_I2C(0x25, 16, 2),
    LiquidCrystal_I2C(0x24, 16, 2),
    LiquidCrystal_I2C(0x23, 16, 2),
    LiquidCrystal_I2C(0x22, 16, 2),
    LiquidCrystal_I2C(0x21, 16, 2),
    LiquidCrystal_I2C(0x20, 16, 2)
  };
  int LED = 0;
  int sda = 4; 
  int scl = 5;
  int current_lcd = 0;
  int current_lcd_line = 0;
  const char* ssid = "XXX";
  const char* password = "XXX";
  const char* clientID = "octoLCD";
  const char* host = "your.hostname.com";
  void setup() {
    Serial.begin(115200);
    Serial.println("Booting");
    Wire.begin(sda, scl);
    for (int i=0; i<8; i++)
    {
      lcd[i].init();
    }
    for (int i=0; i<8; i++)
    {
      lcd[i].backlight();
    }
    setup_wifi();
    // Hostname defaults to esp8266-[ChipID]
    ArduinoOTA.setHostname(clientID);
    // No authentication by default
    ArduinoOTA.setPassword((const char *)"PASSWORD");
    ArduinoOTA.onStart([]() {
      Serial.println("Start");
    });
    ArduinoOTA.onEnd([]() {
      Serial.println("\nEnd");
    });
    ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
      Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
    });
    ArduinoOTA.onError([](ota_error_t error) {
      Serial.printf("Error[%u]: ", error);
      if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
      else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
      else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
      else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
      else if (error == OTA_END_ERROR) Serial.println("End Failed");
    });
    ArduinoOTA.begin();
  }
  void setup_wifi() {
    delay(10);
    // We start by connecting to a WiFi network
    Serial.println();
    Serial.print("Connecting to ");
    Serial.println(ssid);
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
    }
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
  }
  void loop() 
  {
    ArduinoOTA.handle();
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(host, httpPort)) {
      Serial.println("connection failed");
      return;
    }
    delay(10);
    String url = "/81602/index.php";
    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                 "Host: " + host + "\r\n" +
                 "Connection: close\r\n\r\n");
    delay(10);
    boolean ignore = true;
    reset_lcds();
    while (client.connected()) 
    {
      char a,b,c,d;
      if (!ignore)
      {
        String line = client.readStringUntil('\n');
        // char f = (char) client.read();
        Serial.println(line);
        draw(line);
        // lcd[0].print(a);
        // lcd[0].setCursor(0,0);
      }
      else
      {
        a = client.read();
        if (a == 13)
        {
          b = client.read();
          if (b == 10)
          {
            c = client.read();
            if (c == 13)
            {
              d = client.read();
              if (d == 10)
              {
                ignore = false;  
              }
            }
          }
        }
      }
    }
    delay(15000);
  }
  void draw (String line)
  {
    lcd[current_lcd].print(line);
    if (current_lcd_line==1) 
    {
      current_lcd_line = 0;
      if (current_lcd<7) current_lcd++;
    }
    else 
    {
      lcd[current_lcd].setCursor(0,1);
      current_lcd_line = 1;
    }
  }
  void reset_lcds()
  {
    current_lcd = 0;
    current_lcd_line = 0;
    for (int i=0; i<8; i++)
    {
      lcd[i].clear();
    }
  }
  

• soooon

  davedarko • 06/27/2017 at 21:40 • 0 comments

  So the data is served by a webpage, but it's still a mockup. But yay!

• I'm a fire-ing my laser

  davedarko • 06/24/2017 at 21:12 • 3 comments

  noooo.

• So much for not soldering...

  davedarko • 11/05/2016 at 17:05 • 0 comments

  damn, I might have killed one LCD in the process, but it looks nice, especially with the red power lights on the backside. I've hooked up one of my #Ignore this ESP8266 board s via I2C and used an LCD I2C library for arduinos. Almost too easy.

• All boards soldered

  davedarko • 10/13/2016 at 19:23 • 0 comments

  Next up arduino and ic2 stuff. Muahaha.

  [UPDATE]

  Nopes, I'm just tooo lazy to solder a cable with pinheaders today, so I ordered these.

• almost all parts are in

  davedarko • 10/10/2016 at 07:21 • 2 comments

  8 LCDs and 5 I2C boards are in - muahahaha. Sooo.

  Sorry for this short log.

• mini rant

  davedarko • 09/26/2016 at 08:46 • 0 comments

  I really don't like the look of those 1602 LCDs.

  They are ugly. So ugly.

  Heavy and Bulky.

  32 characters, not much at all.

  5 displays for 1 tweet, even though I don't use twitter - this sucks.

  The coolest I've seen done with it where special character animations and the eyes of Chappy.

• I'm going for eight displays now

  davedarko • 09/24/2016 at 16:13 • 3 comments

  There are 3 external address bits on the I2C controller boards and the displays are cheap, so why not have at least eight displays, instead of 5 or 24.

View all 8 project logs