On only for X hours a day

SmartApps & Automations
4

Hello @jamesbc619,

Perhaps you could try using the SmartApp SDK, below is a similar example where the configuration helps you to:

  1. Select a device to receive its events and send commands to it.
  2. Set the time expiration (in seconds).
  3. See the remaining time (in seconds).
  4. When an event is received:
    a. ON: Start the timer.
    b. OFF: Pause the timer.
  5. When the time expires, turn off the device.
const express = require('express');
const SmartApp = require('@smartthings/smartapp');
const bodyParser = require('body-parser');
const Timer = require('easytimer.js').Timer;
 
const server = express();
server.use(bodyParser.json());
 
const app = new SmartApp();
 
let timeLeft=0;
let timer = null;
 
/* Defines the SmartApp */
app.configureI18n()
    .page('mainPage', (context, page, configData) => {
        page.section('switchDev', section => {
            section.deviceSetting('switchD').capabilities(['switch']).required(true).permissions('rx');
        });
        page.section('preferences', (section) => {
            section.numberSetting('aftertime').defaultValue("0");
        });
        page.section('remaining', (section) => {
            section.paragraphSetting('remainingT').text(`${timeLeft}`).description("seconds");
        });
    })
    .updated(async (context, updateData) => {
        await context.api.subscriptions.unsubscribeAll();
        return Promise.all([
            context.api.subscriptions.subscribeToDevices(context.config.switchD, 'switch', 'switch.on', 'switchOnEventHandler'),
            context.api.subscriptions.subscribeToDevices(context.config.switchD, 'switch', 'switch.off', 'switchOffEventHandler')
        ]);
    })
    .subscribedEventHandler('switchOnEventHandler', (context, deviceEvent) => {
        timeLeft=context.configNumberValue('aftertime');
        timer = new Timer();
        timer.start({precision: 'seconds'});
        timer.addEventListener('secondsUpdated', function (e) {
            timeLeft--;
            if(timeLeft==0){
                return context.api.devices.sendCommands(context.config.switchD, "switch", "off")
            }
        });
    })
    .subscribedEventHandler('switchOffEventHandler', (context, deviceEvent) => {
        timer.pause();
    });
 
server.post('/', async (req, res) => {
    app.handleHttpCallback(req, res);
});
 
 
/* Starts the server */
let port = 3000;
server.listen(port, () =>
  console.log(`Server is up and running on port ${port}`)
);

For more information see the sample of a Simple SmartApp and the settings type of the SmartApp SDK .

Let me know if you have any doubts.