17 replies to this topic

[eschneider999]

I'm trying to get my LCD display working.

 

Using:

http://www.amazon.co...ils_o00_s00_i02

 

 

Wiring:

http://www.dfrobot.c...ect_DFR0154.png

 

Also looking for .NET code to run this....

 

Thanks,

Eric

[tim c]

Are you connecting directly to the LCD or using something in between? I have these working on a N+2: 
 
https://www.adafruit.com/products/292
https://www.adafruit.com/products/198
 
I2C to a 20x4 LCD and it works great.

 

I think it is the same LCD. I will be posting a code sample this weekend and will up date you as to were you can find it.

 

Also - if you are using I2C as your hookup diagram shows you need to go into the N+2 ports SC and SD. 

[supra]

Wiring:

http://www.dfrobot.c...ect_DFR0154.png

 

 

You are connecting wrong input (yellow and green). Try digital pins

[JerseyTechGuy]

Hi eschneider999 and welcome to the forums.

 

First, with the ND+2 you need to use the SDA and SCL pins instead of A4 & A5 pins for I2C, so you cannot use the diagram, it will not work.

 

One of the best libraries I've found for LCDs is the Microliquidcrystal library at CodePlex.  There are good examples in the download for using I2C.  If you are still stumped, let us know and we'll get you some example.

 

Good Luck and Happy Coding.

[eschneider888]

Thanks guys, I will review all this and give it a try.

 

FYI: I'm a Software Engineer, but seems everything is broke for Netdruino plus 2. Seems I have to fix alot of things, and still can't get some things to build.

 

 

Also why didn't my posts show-up yesterday? Very frustrating...

[JerseyTechGuy]

Thanks guys, I will review all this and give it a try.

 

FYI: I'm a Software Engineer, but seems everything is broke for Netdruino plus 2. Seems I have to fix alot of things, and still can't get some things to build.

 

 

Also why didn't my posts show-up yesterday? Very frustrating...

 

Not sure about the posts.  Never had a problem posting here so far and I've posted some 566 times.

 

What do you mean by "everything is broke for Netduino Plus 2".  Most ND+2 stuff is working now.  If you describe what you feel is broken perhaps we can point you in the right direction or if it is a real issue with the ND+2, perhaps this will help Chris fix the issues knowing more of your details.

[AxelG]

I used the same exact hardware on the ND and ND+ (version 1) and posed an article with light-weight driver here.

[eschneider999]

Can anyone give me a wiring diagram?

 

Also; my version is 4.2

 

All the code points to 4.1 and changing to 4.2 seems to be an issue. Some classes are missing in 4.2 (SecretLabs)

[JerseyTechGuy]

Can anyone give me a wiring diagram?

 

Also; my version is 4.2

 

All the code points to 4.1 and changing to 4.2 seems to be an issue. Some classes are missing in 4.2 (SecretLabs)

 

Wiring isn't that hard.  5V goes to 5V, GND to GND, SDA to SD and SCL to SC.

[Gutworks]

Also why didn't my posts show-up yesterday? Very frustrating...

 

Hi eschneider888 and welcome to the community! I'm sorry to hear you were having some troubles posting. Unfortunately our forums have been hit in the past with a lot of spam bots and so now before anyone can post, their membership has to be approved by a moderator. I suspect that your account was just in the process of being verified and I highly doubt you'll have any future troubles posting. 

 

Cheers,

Steve

[Gutworks]

Can anyone give me a wiring diagram?

 

Also; my version is 4.2

 

All the code points to 4.1 and changing to 4.2 seems to be an issue. Some classes are missing in 4.2 (SecretLabs)

Yes there have been some changes with the jump from 4.1 to 4.2 but with some small changes you should be able to get your 4.1 examples working after converting them to the 4.2 framework. There was a lot of work done with latest firmware (4.2.2.0) to make the Secret Labs classes more consistent and backwards compatible. If you can provide some examples where you're having some troubles, we'd be more than willing to give you hand and getting your code working again. 

 

Cheers,

Steve

[eschneider999]

Sounds like I have it wired correctly.

 

Keep getting errors when starting:

 

A first chance exception of type 'System.IO.IOException' occurred in MicroLiquidCrystal.dll

[tim c]

Sounds like I have it wired correctly.

 

Keep getting errors when starting:

 

A first chance exception of type 'System.IO.IOException' occurred in MicroLiquidCrystal.dll

What using statements do you have and what is in your references?

 

Also, I have found it best to NOT use a compiled DLL, but instead to use the source and include it as part of my solution. That way the DLL gets compiled for MY specific project. So, maybe try using the source for  MicroLiquidCrystal.dll instead of referencing it directly.

[kash]

Hello All,

I get the IO exception error on N+ with 4.2 update. Has anyone tried the code on N+ only?.

TIA

[d_rotter]

Hello All,

 

I had the same error. The compiled DLL has also worked with my N+1, but not on the N+2. I have tried a few things, but now my 16x2-Display is working with both boards. I've simply Re-Compiled the DLL under Micro Framework 4.2 (Change it in the Project-Properties). The Code is available at Codeplex.

 

Hope it helps.

[alesbedac]

Has anybody working example code for PCF8574A and 20x4 Display ?

 

Above is description above resistor on netduinos I2c port ...but i hvae wired it directly to netduino.

 

is it correct ?

 

Thanks lot of for all your help