Good Morning!
So I nearly successfully assembled my AWESOME 16x2 lcd Plus Keypad.
When I run the LCDPlate example python script, everything functions except:
- When I click up, up registers on the terminal window, but the LCD turns off.
- When I click down, down registers on the terminal window, but the LCD turns off.
- If I then hit any other button they show up on both the LCD and the Terminal window.
So if the up/down button press is happy (since the terminal window sees it), which pins should I look closer at for sending the up/down signal to the LCD?
16x2 Up and Down button woes
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- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: 16x2 Up and Down button woes
Do you have an RGB display (18 pins) or a monochrome display (16 pins).
If you post photos of the front & back of the board, we can check your assembly.
If you post photos of the front & back of the board, we can check your assembly.
-
- Posts: 1
- Joined: Sun Dec 15, 2013 1:56 am
Re: 16x2 Up and Down button woes
Hello,
I was also having the same issue. It is a monochrome 16x2.
Left and Right and Select buttons work and display on the LCD. Up and Down switch off
the LCD display. I noticed in the guide for the 16x2 mention of some button will switch off
as the colours don't exist. When you run the Adafruit_CharLCDPlate.py it cycles through the colours and I see that only RED, YELLOW and VIOLET show up, So I edited the Adafruit_CharLCDPlate.py file and changed in the test section the Up to lcd.YELLOW and the Down to lcd.RED. Now when I press the UP or DOWN Button it displays in the console and on the LCD properly.
thanks
Bruce
I was also having the same issue. It is a monochrome 16x2.
Left and Right and Select buttons work and display on the LCD. Up and Down switch off
the LCD display. I noticed in the guide for the 16x2 mention of some button will switch off
as the colours don't exist. When you run the Adafruit_CharLCDPlate.py it cycles through the colours and I see that only RED, YELLOW and VIOLET show up, So I edited the Adafruit_CharLCDPlate.py file and changed in the test section the Up to lcd.YELLOW and the Down to lcd.RED. Now when I press the UP or DOWN Button it displays in the console and on the LCD properly.
thanks
Bruce
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: 16x2 Up and Down button woes
WIth a monochrome display, the backlight is controlled by the RED pin. So, any colors that have a red component (i.e. RED, YELLOW, VIOLET, WHITE) will turn on the RED pin and cause the backlight to turn on.I see that only RED, YELLOW and VIOLET show up
Please be positive and constructive with your questions and comments.