How to get txt to the grove lcdrgb output

General
1

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

2

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

3

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

4

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

Documentation describes:

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:

{"text":"text on the lcd","rgb":[255,0,0]}
5

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

6

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

7

Sure, or use a change node.

8

I will try that and keep you posted.

9

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

10

There is great documentation available on this site.

11

I found this: How to use oled node

basically solved all my problems.

12

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?

13

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. 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.