I am recieving this warming followed by: Used: /home/schirrel/Downloads/arduino-1.6.6/libraries/LiquidCrystal Not used: /home/schirrel/Arduino/libraries/LiquidCrystal_I2C Anyone having the same?

I am trying to compile your code strain_gauge_shield_and_lcd_arduino_uno_code.ino in my arduino IDE (version 1.6.8) without doing any modification. I obtain the following error: unknown type name ...

I have the same problem. I tried to remove all LiquidCrystal Librairies from he folder Librairies, then when I check the list in Arduino, It says they are still there?? Am I doing something wrong '?

Programming Arduino for Waterproof Ultrasonic Sensor Complete code for Interfacing Waterproof Ultrasonic Sensor JSN SR-04T to Arduino can be found at the end of the page. Here, I am explaining some ...