Someone has worked with LCD 4x20 I2C Model 2004A ?
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Hi Everybody,
I have been working with the LCD 4x20 2004A I2C,using the python LCD library and I couldn't make ir work. Only could put on and off the backligth. I tried to make work with i2c command and neither could communicate with it. There is something that could make it work ?? If you got some example with the command...
Thank on advantage
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are you using it in 4-bit mode? The setup is a little odd. I can give you my code as an example but it's in javascript not python
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@Marcelo-Silva said in Someone has worked with LCD 4x20 I2C Model 2004A ?:
LCD 4x20 2004A
sorry, ignore that. I did it with GPIO not I2C. I could not get the I2C to work with the supplied libraries either.
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I have the same display but i2cdetect cannot reconize it so I have no idea what to do next.
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I was thinking that my display i2c (4/2 rows) were broken but after trying with arduino uno they works.
So I think that something is broken with omega, someone has suggestions?
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@Daniele-Scasciafratte
What firmware are you using?
Firmware's b194, b200 and b201 all include various i2c related enhancements in case you are not using any of them.
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This post is deleted!
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I am using the 0.3.2 b221
This is the output:
This is the schema:
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I opened a ticket in their system and also written to them on twitter https://twitter.com/OnionIoT/status/1126978121423572992 (they replied but no action after that).
So right now I have 2 Omega2+ unusable because there is no assistance and I have to buy other board because the display are not working...
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@Daniele-Scasciafratte
Do you know if the LCD board has any strange requirements for I2C or otherwise, or if it's a purely 5V board?I ask because the Omega2 definitely supports all standard 3.3V I2C devices that run at speeds of 100 kbit/s and 400 kbit/s, and our Starter & Maker Kits come with an I2C-based LCD screen, that we know works for sure.
Have you tried powering the LCD screen with 3.3V?
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I tried with 3.3 and 5v, I tried also the same screen with an arduino uno and there wasn't any issue (the sketch printed and recognized the screen at the default pin as should be).
I tried with another i2c screen that I have and not worked (I had the arduino starter kit that doesn't include the lcd screen).
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With raspberry pi1 (the 2011 model) the screen are working but not with omega that not recognize them.
I will probably resell my omega and various accessories because the assistance is not very helpful
