node-red-contrib-sense-hat-scroll-message

node-red-contrib-sense-hat-scroll-message is a Node-RED node to send scrolling message to the node-red-node-pi-sense-hat-simulator node. It works like an intermediate node, scrolling all messages contained in msg.payload in the LED display of the sense-hat simulator output node.

Note: This isn’t a replacement to the still unimplemented displaying message feature of the node-red-node-pi-sense-hat-simulator. This is meant to be a helper node to support such feature while it is not available.

Installation

To install the package, just run the following command in your Node-RED user
directory (usually ~/.node-red):

npm install node-red-contrib-sense-hat-scroll-message

Edit Dialog Options

• Color
  • Type: HTML input color
  • Default value: #ffffff
  • Values: any hexadecimal color
  • Definition: the message’s color
  • Optional: If the checkbox “Random Colors” is checked, the color option will be disabled
• Background
  • Type: HTML input color
  • Default value: #000000 (equivalent to off)
  • Values: any hexadecimal color
  • Definition: the background of the LED display
• Shift Amount
  • Type: HTML drop-down list
  • Default value: 1
  • Values: 1, 2, 4, or 8
  • Description: The shift amount by which the message will be scrolled
• Delay
  • Type: HTML input
  • Default value: 200
  • Description: delay in milliseconds
• Rotation
  • Type: HTML drop-down list
  • Default value: 0
  • Values: 0, 90, 180, 270
  • Description: rotation in degrees
• Flip
  • Type: HTML drop-down list
  • Default value: no
  • Values: no, horizontally, vertically
  • Description: flips the message

Acknowledgment

The scrolling algorithm was based on the solution present in:

McRoberts, M. (2013). Beginning Arduino. Apress.

License

node-red-contrib-sense-hat-scroll-message is available under the MIT license. See the LICENSE file for more info.