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--- en:iot:examples:oled [2018/12/27 12:53] – external edit 127.0.0.1
+++ en:iot:examples:oled [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
+======  Oled display example======
+Oled module must be connected to controller module or with sensor module.
+{{:en:iot:examples:oledpicture1.jpg?200|}}
+{{:en:iot:examples:oledpicture2.jpg?200|}}
+Needed libraries:
+<code>lib_deps = ITTIoT, Adafruit GFX Library, Adafruit SSD1306 Wemos Mini OLED, adafruit/Adafruit BusIO</code>
+ The example code above shows counter value on screen
+<code c>
+#include <Arduino.h>
+#include <ittiot.h>
+#include <Ticker.h>
+#include <ESP8266WiFi.h>
+#include <Adafruit_I2CDevice.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+#define WIFI_NAME "name"
+#define WIFI_PASSWORD "password"
+// OLED reset pin is GPIO0
+#define OLED_RESET 0  // GPIO0
+Ticker timeTicker;
+Adafruit_SSD1306 display(OLED_RESET); // Create an object for OLED screen
+bool isBootModeNormal;
+bool sendDataFlag;
+int i = 0; // Counter variable is defined
+// ITT splashs screen bitmap. Generator can be found in: http://javl.github.io/image2cpp/
+static const unsigned char PROGMEM logo16_glcd_bmp[] =
+{
+x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00,
+x00, 0x07, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+x00, 0x07, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+x00, 0x07, 0x1f, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00,
+x00, 0x07, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00,
+x00, 0x07, 0x1f, 0xe3, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x07, 0x1f, 0xe3, 0xff, 0xc0, 0x00, 0x00,
+x00, 0x07, 0x10, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x10, 0xe2, 0x00, 0x00, 0x00, 0x00,
+x00, 0x07, 0x10, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x10, 0xe3, 0xff, 0xff, 0xf8, 0x00,
+x00, 0x07, 0x10, 0xe0, 0x00, 0x00, 0x18, 0x00, 0x00, 0x07, 0x10, 0xe0, 0x00, 0x00, 0x18, 0x00,
+x00, 0x07, 0x10, 0xe0, 0x00, 0x00, 0x18, 0x00, 0x00, 0x07, 0x10, 0xe3, 0xfc, 0xff, 0xf8, 0x00,
+x00, 0x07, 0x10, 0xe3, 0xfc, 0xff, 0xf8, 0x00, 0x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x07, 0x10, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x07, 0xf0, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0xe2, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x80, 0x00, 0x00,
+x00, 0x00, 0x00, 0x00, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+// Ticker library callback, which will occur 0.5 second interval.
+void sendData()
+{
+  sendDataFlag=true;
+}
+// If message received print it out.
+void iot_received(String topic, String msg)
+{
+  Serial.print("MSG FROM USER callback, topic: ");
+  Serial.print(topic);
+  Serial.print(" payload: ");
+  Serial.println(msg);
+}
+// Function started after the connection to the server is established.
+void iot_connected()
+{
+  Serial.println("MQTT connected callback");
+  iot.log("IoT OLED screen example!");
+  isBootModeNormal = true;
+}
+void setup()
+{
+  Serial.begin(115200); // setting up serial connection parameter
+  Serial.println("Booting");
+  // initialize with the I2C addr 0x3C (for the 64x48)
+  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
+  // Since the buffer is initialized with an Adafruit splashscreen
+  // internally, we should clear it
+  display.clearDisplay();
+  // Load ITT splash screen into buffer
+  display.drawBitmap(0, 0,  logo16_glcd_bmp, 64, 48, 1);
+  // Show image buffer on the display
+  display.display();
+  // Display splashscreen two second
+  delay(2000);
+  //iot.setConfig("wname", WIFI_NAME);
+  //iot.setConfig("wpass", WIFI_PASSWORD);
+  // print IoT json config to serial
+  iot.printConfig();
+  // Initialize IoT library
+  iot.setup();
+  // Initialize Ticker interval and callback
+  timeTicker.attach(0.5, sendData);
+}
+// Main code, which runs in loop
+void loop()
+{
+  // IoT behind the plan work, it should be periodically called
+  iot.handle();
+  // Increase counter value by 1
+  i++;
+  // Display counter value on the OLED screen
+  display.clearDisplay(); // clears the srceen
+  display.setTextSize(1); // sets the text size for the screen
+  display.setTextColor(WHITE); // text color is set to white
+  display.setCursor(0,0); // position from where the text writing is starting
+  display.println("Counter: "); // a text is send to the screen
+  display.println(i); // counter value is send to the screen
+  display.display(); // show image
+  // Send counter value to the computer
+  if(WiFi.isConnected() && isBootModeNormal)
+  {
+    if(sendDataFlag)
+    {
+      sendDataFlag = false;
+      String msg = String(i);
+      iot.publishMsg("count", msg.c_str());
+      Serial.println(msg);
+    }
+  }
+  delay(500); // delay of 0.5s, to change the counter value slowly
+}
+</code>