I am just working on a control unit for my pool heating. I do have the Arduino Duemil. and the LCD Keypad Shield from Dr. Robot. As i am not always watching the display during operation i do want to implement a timeout in the code for turning the display off till a key is pressed.
I found out and got Pin 10 (LED backlit) working in test mode propperly (key up = on, key down = off) But the text on the display keeps (even without backlit).
Is there a way to turn the LCD off via code or do i need a hardware switch?
Thx in advance for your help