Led Control Panel Example

This example demonstrates a simple program execution panel in EcuBus-Pro, including status indication and message display.

Features Demonstrated

1. Program Execution Control

   • A "Start" button toggles the execution of a simulated program.
   • When started, the program runs for a random time (2-5 seconds) and then fails automatically.

2. Status Indication

   • Two large LED indicators:
     • Red LED: Lights up when the program fails.
     • Blue LED: Lights up when the program succeeds (not used in this demo, but present for extension).
   • Status message area displays the current state (e.g., "Starting program execution", "Program failed after random time", "Manual stop of program execution").

3. Panel Layout

   • Includes a logo and title for easy identification.
   • All controls and indicators are arranged in a grid for clarity.

Variables Used

Variable Name	Type	Purpose / Description
Program.run	number	Controls the start/stop of the program (triggered by the Start button).
Program.success	number	Indicates if the program succeeded (set to 1 on start, 0 on failure/stop).
Program.failed	number	Indicates if the program failed (set to 1 on failure, 0 otherwise).
Program.msg	string	Displays the current status message in the panel.

More information about variables can be found in the Variable section.

How It Works

• Press the Start button to begin the program.
• The message area will show "Starting program execution".
• After a random interval (2-5 seconds), the program will simulate a failure:
  • The message updates to "Program failed after random time".
  • The red LED lights up.
  • The Start button resets.
• You can manually stop the program by toggling the Start button off, which will show "Manual stop of program execution".

Example Panel

Code Overview

• panel.ecb: Defines the panel layout, variables, and UI elements.
• program.ts: Handles the logic for starting, stopping, and simulating program failure.

import { setVar } from 'ECB'
let timer: NodeJS.Timeout
Util.OnVar('Program.run', async (args) => {
  if (args.value == 1) {
    setVar('Program.success', 1)
    setVar('Program.failed', 0)
    setVar('Program.msg', 'Starting program execution')
    timer = setTimeout(async () => {
      setVar('Program.msg', 'Program failed after random time')
      setVar('Program.failed', 1)
      setVar('Program.success', 0)
      setVar('Program.run', 0)
    }, randomTime)
  } else {
    setVar('Program.msg', 'Manual stop of program execution')
    setVar('Program.success', 0)
    setVar('Program.failed', 0)
    clearTimeout(timer)
  }
})
const randomTime = Math.floor(Math.random() * (5000 - 2000 + 1)) + 2000