Connect Grove LCD RGB to Base Shield on a Arduino

[Sam37]

I want to print on grove lcd number on I2C port on base shield, all this on arduino Uno PDIP but not work, after the transfer on the card it does not show me anything, the voltage is well on 5V.

[Benj]

Hi Sam,

Please can you attach your program and I will investigate for you.

[Sam37]

Hi Sam,

Please can you attach your program and I will investigate for you.

Hey, I thought I had put it, and I do not have access to my pc, but it's just a program to test the screen, with a button and the LCD

[Benj]

Hello,

The program you're using will help a lot, it shows what chip you're using, your configuration settings, the specific LCD component etc. Just helps for us to rule out the easy stuff before having to dig into the more complicated specifics.

Attach it when you can and we will investigate.

[Sam37]

The file ^^

[Sam37]

Hello,

The program you're using will help a lot, it shows what chip you're using, your configuration settings, the specific LCD component etc. Just helps for us to rule out the easy stuff before having to dig into the more complicated specifics.

Attach it when you can and we will investigate.

So ? Have you a idea ?

[QMESAR]

So ? Have you a idea ?

Have a bit of patience it is Sunday, MATRIX staff as most other people in the world does not work on Sundays

[Benj]

Hello,

Right you're currently using the I2C LCD component which is meant for LCDs using the standard I2C Backpack.

For example.
https://www.adafruit.com/product/292

The Grove modules require asynchronous serial (UART) not I2C so that's probably why the code isn't working for you.

We have a plan to look at supporting the Grove modules in the near future.

In the mean time I will see if I can knock something together for you so you can use the display.

[Benj]

Right here is a new and untested component for the Grove display.

Simply add the component to your installation by copying the attached file to your "Flowcode 7/components" directory before starting Flowcode and the new component will appear in the displays component category.

lcd_Grove.fcpx

(25.14 KiB) Downloaded 436 times

Let me know how you get on.

[Sam37]

Right here is a new and untested component for the Grove display.

Simply add the component to your installation by copying the attached file to your "Flowcode 7/components" directory before starting Flowcode and the new component will appear in the displays component category.

lcd_Grove.fcpx

Let me know how you get on.

Thank I try tomorrow ^^

[Sam37]

Right here is a new and untested component for the Grove display.

Simply add the component to your installation by copying the attached file to your "Flowcode 7/components" directory before starting Flowcode and the new component will appear in the displays component category.

The attachment lcd_Grove.fcpx is no longer available

Let me know how you get on.

Not work

IMG_20161206_095836.jpg (115.33 KiB) Viewed 17430 times

IMG_20161206_095908.jpg (99.07 KiB) Viewed 17430 times

[Benj]

The component I made was for the serial version, I'll have another go now at the I2C version. I didn't even know they had I2C grove modules.

[Benj]

Right hopefully this component will work correctly for you.

lcd_Grove_I2C.fcpx

(25.54 KiB) Downloaded 362 times

Let me know how you get on.

[Sam37]

Right hopefully this component will work correctly for you.

lcd_Grove_I2C.fcpx

Let me know how you get on.

Thank I'll try thursday

[Sam37]

Right hopefully this component will work correctly for you.

The attachment lcd_Grove_I2C.fcpx is no longer available

Let me know how you get on.

Not work

[Benj]

Hi Sam,

Please can you send me your program so we can double check there is nothing wrong there.

Also when you upload images please can you reduce the pixel size a bit, I'm reducing the pixel width to 640 to allow the image to be seen.

[Sam37]

Hi Sam,

Please can you send me your program so we can double check there is nothing wrong there.

Also when you upload images please can you reduce the pixel size a bit, I'm reducing the pixel width to 640 to allow the image to be seen.

Ok, sorry but i send from my phone ^^ (for picture)

[Benj]

Hello,

Thanks for the file. There may be a way on your phone to edit the image dimensions either when you take the photo or before you attach the file. Just makes it easier to look at what's going on.

Looking at the code, maybe try an LCD address of 62 rather than 124 and see if that makes any difference.

Everything else seems to look ok.

[Benj]

Aha found a minor problem that the I2C address is different for the backlight.

So this should now be fixed but might also need to be divided by 2 to work correctly.

lcd_Grove_I2C.fcpx

(25.2 KiB) Downloaded 315 times

The grove library looks like this which suggests the divide by 2 is needed.

#define LCD_ADDRESS (0x7c>>1)
#define RGB_ADDRESS (0xc4>>1)

(0x7c>>1) = 62
(0xc4>>1) = 98

[Sam37]

Aha found a minor problem that the I2C address is different for the backlight.

So this should now be fixed but might also need to be divided by 2 to work correctly.

lcd_Grove_I2C.fcpx

The grove library looks like this which suggests the divide by 2 is needed.

#define LCD_ADDRESS (0x7c>>1)
#define RGB_ADDRESS (0xc4>>1)

(0x7c>>1) = 62
(0xc4>>1) = 98

Divised by 2 ? 2 i2c module in flowcode ? I must change lcd and rgb adress with 62 and 98 ? For now i have try with your NEW i2c module without division and with change of adress and not work, thank for ll i wait your answer

[Sam37]

I have buy a alternative arduino kit with a right lcd i2c, today i can try it, when i retry tpvuse a i2c lcd, not work

[kersing]

Please resize pictures to normal (800x600 max) dimensions before posting. These pictures are far to large.

[Sam37]

Please resize pictures to normal (800x600 max) dimensions before posting. These pictures are far to large.

[Benj]

maybe try an LCD address of 62 rather than 124 and see if that makes any difference.

Did you try this?

[Sam37]

maybe try an LCD address of 62 rather than 124 and see if that makes any difference.

Did you try this?

Where did you find 124, i have in i2c config 32, i'll try 64 and 124 and not work