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The units themselves are fine, came assembled in a protected case. I had no experience with these before. The choice of include files was a little tricky. I found that the <Arduino.h>, <U8g2lib.h>, and <Wire.h> libs worked for text and graphics. I was able to display both text and graphics with my test code within a couple hours. U8G2_SSD1306_128X32_UNIVISION_F_SW_I2C u8g2(U8G2_R0, A5, A4, U8X8_PIN_NONE) worked for this unit. The arduino examples for u8g2 didn't have that listed. 3 text lines.