<![CDATA[Someone has worked with LCD 4x20 I2C Model 2004A ?]]>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

]]>http://community.onion.io/topic/3581/someone-has-worked-with-lcd-4x20-i2c-model-2004aRSS for NodeSat, 06 Jun 2026 15:17:56 GMTMon, 22 Apr 2019 16:29:06 GMT60<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 22 Apr 2019 16:29:06 GMT]]>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

]]>http://community.onion.io/post/19395http://community.onion.io/post/19395Mon, 22 Apr 2019 16:29:06 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 22 Apr 2019 19:36:59 GMT]]>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

]]>http://community.onion.io/post/19396http://community.onion.io/post/19396Mon, 22 Apr 2019 19:36:59 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 22 Apr 2019 19:39:11 GMT]]>@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.

]]>http://community.onion.io/post/19397http://community.onion.io/post/19397Mon, 22 Apr 2019 19:39:11 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 06 May 2019 16:34:31 GMT]]>I have the same display but i2cdetect cannot reconize it so I have no idea what to do next.

]]>http://community.onion.io/post/19461http://community.onion.io/post/19461Mon, 06 May 2019 16:34:31 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Thu, 09 May 2019 13:00:17 GMT]]>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?

]]>http://community.onion.io/post/19478http://community.onion.io/post/19478Thu, 09 May 2019 13:00:17 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Thu, 09 May 2019 14:02:20 GMT]]>@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.

]]>http://community.onion.io/post/19480http://community.onion.io/post/19480Thu, 09 May 2019 14:02:20 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Fri, 10 May 2019 15:34:42 GMT]]>I am using the 0.3.2 b221
This is the output: 0_1557502413223_834dc881-51ce-4c22-86bf-dd6e7dc11970-immagine.png

This is the schema:
0_1557502459135_photo_2019-05-10_17-33-45.jpg

]]>http://community.onion.io/post/19487http://community.onion.io/post/19487Fri, 10 May 2019 15:34:42 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Wed, 15 May 2019 09:25:24 GMT]]>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...

]]>http://community.onion.io/post/19498http://community.onion.io/post/19498Wed, 15 May 2019 09:25:24 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Wed, 15 May 2019 13:45:08 GMT]]>@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?

]]>http://community.onion.io/post/19499http://community.onion.io/post/19499Wed, 15 May 2019 13:45:08 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 20 May 2019 10:27:02 GMT]]>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).

]]>http://community.onion.io/post/19510http://community.onion.io/post/19510Mon, 20 May 2019 10:27:02 GMT<![CDATA[Reply to Someone has worked with LCD 4x20 I2C Model 2004A ? on Mon, 27 May 2019 17:17:13 GMT]]>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 😕

]]>http://community.onion.io/post/19533http://community.onion.io/post/19533Mon, 27 May 2019 17:17:13 GMT