We all like cheap items off eBay especially if they do cool and unusual things, sometimes we get so carried away by the price that we do not even realize that fact that we do not know anything about ...

OLED_U8G 、OLED_GFX 都是ardunio和esp32專用的。 OLED 是stm32 。 Arduino 與OLED 之間使用I2C 通訊。 A4類比腳位 接SDA、 A5類比腳位 接SCL OLED 選用 SSD1306。尺寸: 0.96吋：128x64 OLED_U8G : 使用 U8GLIB 庫 ，顯示OLED Menu。

I use init line in sketch U8GLIB_UC1608_240X64 u8g (13, 11, 10, 9, 8); My scheme now: 13 pin arduino = 17 pin display (sck) 11 pin arduino = 14 pin display (mosi) 10 pin arduino = 22 pin display (cs) ...