faq

doc/faq.txt

@@ -171,6 +171,13 @@ Q: U8g2 requires a lot of memory. How to reduce this?
 - If the I2C interface is not required, then uncomment #define U8X8_HAVE_HW_I2C in U8x8lib.h
   (Background: Due to a problem in Wire.h, the I2C Arduino lib is always included)
 
+Q: There is no visible output output. What is can be done?
+- Check the wiring, see first part of this FAQ.
+- Check the constructor. Does it fit to your display?
+- Do not output a text at (0,0): The reference point for text is lower left, so 
+  u8g2_DrawStr(&u8g2, 0, 0, “Hello world!”); will not display anything. Instead use
+  u8g2_DrawStr(&u8g2, 0, 20, “Hello world!”);
+
 Q: U8g2 output is corrupted. What are possible causes?
 - Do not change the output inside the firstPage/nextPage loop: 
 Do *not* call digitalRead/analogRead inside the firstPage/nextPage loop.