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Topic: Help! Noobie not able to get lcd working (Read 912 times) previous topic - next topic

liudr

I should have used that mega I bought. It is just collecting dust.

GaryP


I should have used that mega I bought. It is just collecting dust.


Heh, Mega 1280 was my first Arduino, and least used with all my tests. Maybe it is waiting for the big day, "The Project"-day?
XD

Cheers,
Kari
The only law for me; Ohms Law: U=R*I       P=U*I
Note to self: "Damn! Why don't you just fix it!!!"

meanpc

Having a similar problem with the i2c display:
http://www.ebay.com/itm/190573003243?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

I have it connected to analog 4 and 5, 5v and gnd just like the OP.  I am using an Arduino Uno.  Anything special I should know before I contact the seller?   I tried switching the data lines, adjusted the pot, even tried some different library files.  The blue backlight comes on but no text is displayed.

Thanks

liudr

Did you try to disconnect SCL and SDA and just power up the LCD with 5V and GND? Can you see blocks on line one?

meanpc

I was using the wrong library.  I downloaded the library per the ebay ad and it didn't work.  I tried several others.  Finally, I went to DFRobot and downloaded the library on their product page here - http://www.dfrobot.com/index.php?route=product/product&path=53&product_id=135

My board doesn't say DFRobot on the back, it says YwRobot - but this is the only library that works.

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