# How to get txt to the grove lcdrgb output

**URL:** <https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035>\
**Category:** General\
**Created:** [16 November 2019 11:32 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035 "2019-11-16T11:32:24Z")\
**Posts on this page:** 14\
**Page:** 1

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [16 November 2019 11:32 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/1 "2019-11-16T11:32:24Z")

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I am trying to get a sensor value or any value displayed on the "grove lcdrgb output" I get the following error in my terminal "LCD-RGB Invalid text: undefined

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [16 November 2019 11:42 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/2 "2019-11-16T11:42:12Z")

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Sorry you need to provide more information, is this about node-red ?  
If yes, what does your flow look like, debug node outputs etc.

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [16 November 2019 11:49 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/3 "2019-11-16T11:49:18Z")

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![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/5/58396da087f5323fe83bae358cec125e2a94cff5.png)

I am just playing around. But I can't figure out how to get a value or text to my lcd screen.

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [16 November 2019 11:53 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/4 "2019-11-16T11:53:02Z")

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I am not aware of a "grove lcdrgb" but looked it up.

Documentation describes:

```auto
GrovePi LcdRGB Output Node

Sends data to GrovePi LcdRGB I2C-Device.

The msg.payload should have separate keys. If rgb is not set, the information will be the once configured with the node itself.

    text: <the lcd text>,
    rgb: [255,0,0]

```

In the inject node you could set it to `json`:

```auto
{"text":"text on the lcd","rgb":[255,0,0]}

```

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [18 November 2019 12:10 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/5 "2019-11-18T12:10:22Z")

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> [@bakman2](#):
>
> {"text":"text on the lcd","rgb":[255,0,0]}

Thank you so much!!!!!!!!!!!!!!

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [18 November 2019 12:14 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/6 "2019-11-18T12:14:51Z")

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Is it also possible to make this into a javascript function?

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [18 November 2019 16:14 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/7 "2019-11-18T16:14:46Z")

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Sure, or use a change node.

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [18 November 2019 16:26 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/8 "2019-11-18T16:26:31Z")

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I will try that and keep you posted.

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [19 November 2019 10:06 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/9 "2019-11-19T10:06:36Z")

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Can you give me some pointers how to do that? I am a noob I am sorry.

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**Author:** ![bakman2](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bakman2/32/6207_2.png) [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Post date:** [19 November 2019 14:17 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/10 "2019-11-19T14:17:57Z")

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There is [great documentation](https://nodered.org/docs/user-guide/messages) available on this site.

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**Author:** ![bmeester](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@bmeester](https://discourse.nodered.org/u/bmeester)\
**Post date:** [27 November 2019 15:43 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/11 "2019-11-27T15:43:08Z")

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I found this: [How to use oled node](https://discourse.nodered.org/t/how-to-use-oled-node/5423/2)

basically solved all my problems.

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**Author:** ![Terpstra](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Terpstra](https://discourse.nodered.org/u/Terpstra)\
**Post date:** [24 July 2021 11:50 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/12 "2021-07-24T11:50:26Z")

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I am trying to get a sensor value on the "grove lcdrgb output"

GrovePi LcdRGB Output Node Sends data to GrovePi LcdRGB I2C-Device.

I have used a Inject node for text and RGB to set the color, this is working perfect

{"text":"text on the lcd","rgb":[255,0,0]}

I have Temperature data in msg. payload.temperature:number

I would like to add the value example 18 to GrovePi LcdRGB I2C-Device.

How can I get this done?

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [24 July 2021 11:58 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/13 "2021-07-24T11:58:59Z")

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Instead of setting the value of `text` to a constant string, set it to the value of `msg.payload.temperature` using a **change** node or **function** node.

As you have provided no flow or stated where `msg.payload.temperature` comes from and have not stated what prefix or suffix text you want to display I cannot help more that that except to say as you are new to node-red, I recommend watching this playlist: [Node-RED Essentials](https://www.youtube.com/playlist?list=PLyNBB9VCLmo1hyO-4fIZ08gqFcXBkHy-6). The videos are done by the developers of node-red. They're nice & short and to the point. You will understand a whole lot more in about 1 hour. A small investment for a lot of gain.

As this thread is 2 years old and bmeester hasnt been online for over 1 year, it is unlikely he will respond - I am closing it.

If you still have issues, start a new thread.

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [24 July 2021 11:59 UTC](https://discourse.nodered.org/t/how-to-get-txt-to-the-grove-lcdrgb-output/18035/14 "2021-07-24T11:59:01Z")

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