#include <Wire.h> #include <Adafruit_SSD1306.h> #include "arial_black_16.h" // Your custom library If you are using Adafruit_GFX, you need a custom print class. However, if you use U8g2 , the process is much easier because U8g2 accepts these headers natively:
static const u8g2_font_info_t arial_black_16_info = { "Arial Black 16", 16, // Height 8, // Width // ... Bounding box data ... }; arial black 16.h library
At first glance, this looks like a typo or a corrupted file path. But to those working with low-level graphics libraries (like U8g2, Adafruit_GFX, or LVGL on constrained devices), this string represents a holy grail: a pre-rendered, monospaced, bitmapped font file for the Arial Black typeface at a 16-pixel size. #include <Wire
By understanding that this keyword points to a generated C-header file containing a bitmap array, you unlock the ability to put professional-looking, bold typography onto any screen, from an SPI OLED to a parallel TFT. }; At first glance, this looks like a
void setup() { u8g2.begin(); u8g2.setFont(arial_black_16); // Note: The variable name inside your .h file }
#include <U8g2lib.h> // Use the reference to the external font U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);
Move arial_black_16.h into your Arduino sketch folder (or the src folder of your PlatformIO project).