Hey all,
So I just received my LCD screen, made all of the solder connections, nothing (to my knowledge) has been "crossed" while soldering the boards. However, I can only see a very faint image on the screen, and it is 8 "boxes" showing. I adjusted the contrast adjuster, and it is still showing very lightly. there is no active backlight, and when i attempt to run i2cdetect, it comes back showing the screen on 20x (which i think is a good thing). I attempt to run the test script from the install guide, and get an error back stating that it cannot connect/see the i2c device.
Any help would be greatly appreciated. Thanks!
16X2 LCD
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Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/
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- adafruit_support_bill
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Re: 16X2 LCD
Post photos of the front & back of the board and we'll check your assembly.
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Re: 16X2 LCD
http://imgur.com/Pc7LA7D
http://imgur.com/u1EzHOg
I checked again, and it def seems as though it is all connected correctly. Let me know what you think, thanks a bunch!
http://imgur.com/u1EzHOg
I checked again, and it def seems as though it is all connected correctly. Let me know what you think, thanks a bunch!
- adafruit_support_bill
- Posts: 88155
- Joined: Sat Feb 07, 2009 10:11 am
Re: 16X2 LCD
The solder looks very good from what I can see. Can you post one showing the rest of the front (including switches & chip).
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- adafruit_support_bill
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- Joined: Sat Feb 07, 2009 10:11 am
Re: 16X2 LCD
Everything looks good.
Which I2C bus is the device detected on, 0 or 1? Does the example code use the same bus?
Rev1 of the Pi's used a different I2C bus than Rev2, so the example code may need to be tweaked to match.
Which I2C bus is the device detected on, 0 or 1? Does the example code use the same bus?
Rev1 of the Pi's used a different I2C bus than Rev2, so the example code may need to be tweaked to match.
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- Joined: Tue Feb 05, 2013 10:11 pm
Re: 16X2 LCD
It is detected on 1. Would you be able to advise me on the code needed to change the output?
- adafruit_support_bill
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Re: 16X2 LCD
It is descrinbed in the tutorial here: http://learn.adafruit.com/adafruit-16x2 ... y-pi/usage
If you have a rev 2 (512MB) Pi, or if you're not getting anything displaying, it might be due to the I2C bus number change in the Pi hardware. Edit Adafruit_CharLCD.py using a command like "nano Adafruit_CharLCD.py" and change the line
lcd = Adafruit_CharLCDPlate(busnum = 0)
to
lcd = Adafruit_CharLCDPlate(busnum = 1)
Forum rules
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/