/************************************************************************************************* 
                                      PROGRAMMINFO
************************************************************************************************** 
Funktion: ESP32 0,96" Zoll SSD1306 OLED Display  SSD1306 Display I2C 128 x 64 Pixel 
**************************************************************************************************
Version: 30.03.2022
**************************************************************************************************
Board: ESP32vn IoT UNO V1.0.4
**************************************************************************************************
C++ Arduino IDE V1.8.13
**************************************************************************************************
Einstellungen:
https://dl.espressif.com/dl/package_esp32_index.json
http://dan.drown.org/stm32duino/package_STM32duino_index.json
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
**************************************************************************************************
**************************************************************************************************/

#include <U8g2lib.h>
#include <Wire.h>
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);
const char COPYRIGHT_SYMBOL[] = { 0xa9, '\0' };
void u8g2_prepare() {
 u8g2.setFont(u8g2_font_6x10_tf); 
 u8g2.setFontRefHeightExtendedText(); 
 u8g2.setDrawColor(1);
 u8g2.setFontPosTop();
 u8g2.setFontDirection(0);
}
void u8g2_box_frame() {
 u8g2.drawStr(0, 0, "drawBox");
 u8g2.drawBox(5, 10, 20, 10);
 u8g2.drawStr(60, 0, "drawFrame");
 u8g2.drawFrame(65, 10, 20, 10);
}
void u8g2_r_frame_box() {
 u8g2.drawStr(0, 0, "drawRFrame");
 u8g2.drawRFrame(5, 10, 40, 15, 3);
 u8g2.drawStr(70, 0, "drawRBox");
 u8g2.drawRBox(70, 10, 25, 15, 3);
}
void u8g2_disc_circle() {
 u8g2.drawStr(0, 0, "drawDisc");
 u8g2.drawDisc(10, 18, 9);
 u8g2.drawDisc(30, 16, 7);
 u8g2.drawStr(60, 0, "drawCircle");
 u8g2.drawCircle(70, 18, 9);
 u8g2.drawCircle(90, 16, 7);
}
void u8g2_string_orientation() {
 u8g2.setFontDirection(0);
 u8g2.drawStr(5, 15, "0");
 u8g2.setFontDirection(3);
 u8g2.drawStr(40, 25, "90");
 u8g2.setFontDirection(2);
 u8g2.drawStr(75, 15, "180");
 u8g2.setFontDirection(1);
 u8g2.drawStr(100, 10, "270");
}
void u8g2_line() {
 u8g2.drawStr( 0, 0, "drawLine");
 u8g2.drawLine(7, 10, 40, 32);
 u8g2.drawLine(14, 10, 60, 32);
 u8g2.drawLine(28, 10, 80, 32);
 u8g2.drawLine(35, 10, 100, 32);
}
void u8g2_triangle() {
 u8g2.drawStr( 0, 0, "drawTriangle");
 u8g2.drawTriangle(14, 7, 45, 30, 10, 32);
}
void u8g2_unicode() {
 u8g2.drawStr(0, 0, "Unicode");
 u8g2.setFont(u8g2_font_unifont_t_symbols);
 u8g2.setFontPosTop();
 u8g2.setFontDirection(0);
 u8g2.drawUTF8(10, 15, "☀");
 u8g2.drawUTF8(30, 15, "☁");
 u8g2.drawUTF8(50, 15, "☂");
 u8g2.drawUTF8(70, 15, "☔");
 u8g2.drawUTF8(95, 15, COPYRIGHT_SYMBOL); //COPYRIGHT SIMBOL
 u8g2.drawUTF8(115, 15, "\xb0"); // DEGREE SYMBOL
}
void setup(void) {
 u8g2.begin();
 u8g2_prepare();
}
void loop(void) { 
 u8g2.clearBuffer();
 u8g2_prepare();
 u8g2_box_frame();
 u8g2.sendBuffer();
 delay(1500); 
 u8g2.clearBuffer();
 u8g2_disc_circle();
 u8g2.sendBuffer();
 delay(1500); 
 u8g2.clearBuffer();
 u8g2_r_frame_box();
 u8g2.sendBuffer();
 delay(1500); 
 u8g2.clearBuffer();
 u8g2_prepare();
 u8g2_string_orientation();
 u8g2.sendBuffer();
 delay(1500); 
 u8g2.clearBuffer();
 u8g2_line();
 u8g2.sendBuffer();
 delay(1500); 
 u8g2.clearBuffer();
 u8g2_triangle();
 u8g2.sendBuffer();
 delay(1500);
 u8g2.clearBuffer();
 u8g2_prepare();
 u8g2_unicode();
 u8g2.sendBuffer();
 delay(1500);
}