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Get Google Nest alarms and timers as notifications




TL; Using DRHome Assistant and Node-RED Receive actionable notifications about Google Home alarms and timers on your Android smartphone. The notification shows all the information, is grouped and has a countdown.

I’m a big fan of Google (Nest) smart devices and have multiple hub and mini devices in my smart home setup. Use them in combination with Home Assistant and Node-RED to control all devices and automation flows.

Alarms and timers

The device’s alarm and timer features are the ones I use most often and I use them every day. They work fine, but they lack some features to make them great.

I don’t see it on my phone I don’t notice the alarm / timer ringing when my phone is ringing and I’m not in the same room Home Assistant Google Home integration

This week we discovered a new community integration called “Google Home” that exposes alarms and timers as HA sensors.

Home Assistant Google Home Custom Component I installed it via HACS, but it works very well and the alarm and timer sensor entities are created for each device.

I was wondering if I could use it for some new automation to add more features, especially if they could be used as notifications on my phone.


Show alarms and timers as phone notifications Countdown until the alarm sounds Notifications appear when notifications close Close notifications and alarms / timers need to be removed Remove notifications if deleted on Google devices Must node-RED

I use Node-RED for all the automation and I like the way the flow is visualized. Often referred to as a low-code solution. As a developer, I also like the option to apply code logic.

What you see next is the final result of trial and error programming. Normally I start with one sensor input and a normal flow. Then you often tweak this to transform it into a reusable subflow.

What will the main flow look like:

Ultimately, we needed one subflow to control everything, using multiple alarm and timer sensors as inputs.


The upper flow processes all inputs and the lower flow processes cleared notifications.

Analyze input from topflow sensor Determine if it is an alarm sensor or timer sensor Cache active items (including type and sensor information) in memory Create / update notification message for each active item Inactive Message to the call service node that sends a clear_notification message for each item

Let’s start with the “Parsealarms & timers” function node, which does all the tedious work. Use the Function node’s Setup tab to set some defaults used in the flow.

// Set type defaults constdefaults = {timer: {id:’timer_id’, label:”, items:’timers’, name:’Timers’, deleteService:’delete_timer’}, alarm: {id:’alarm_id ‘, label:”, items:’alarms’, name:’Alarms’, deleteService:’delete_alarm’},} flow.set (‘defaults’, defaults); Enter full screen mode Exit full screen mode

“Features” tab

const defaults = flow.get (‘defaults’); const service = env.get (‘service’); const message = []; Type =”; if (! {returns null;} // Determine type: alarm or timer if (typeof! ==’undefined’ || typeof! ==’undefined’) {type =’timer’;} else if (typeof! ==’undefined’ || typeof old_state.attributes.alarms! ==’undefined’) {type =’alarm’;} else {returns null;} const typeValues ​​= defaults[type]; // Create an alarm / timer item that can be used by the service constcreateItem = (item, sensor, type, device) => {const doneTime = new Date (item.fire_time * 1000) .toTimeString (). substr (0, 5); Label = `$ {typeValues.label}`; Vibration =”; Chronometer = true; if (item.status ===’ringing’) {label = item.label? `$ {label} $ {item.label} RINGING`: `$ {label} RINGING`; Vibration = ‘100, 1000, 100, 1000, 100, 100, 1000, 100, 1000, 100′; Chronometer = false ;} else {label = item.label? `$ {label} $ {doneTime} $ {item.label}`: `$ {label} $ {doneTime}`;} let title = label; if (item.duration) {title = `$ {label} ($ {item.duration}) `;} return {id: item[], Sensor: Sensor, Device: Device, Type: Type, Status: item.status, Data: {Title: Title, Message: `$ {Device}`, Data: {Tag: Item[], Chronometer: Chronometer, When: item.fire_time, sticky:’true’, Group:, vibrationPattern: Vibration}}}}; const mapItems = (arr) => {return ((item)) => {return createItem (item,, type,})} const activeItems = mapItems ([typeValues.items] || []) .Filter (item => item.status! ==’none’); const cachedItems = flow.get (‘cachedItems’) || new Map (); // Update or create notifications for active items activeItems .forEach ((item) => {messages.push ({payload: {service: service, data:}}); cachedItems.set (, item);}) // Expired / Deleted Clear notification cachedItems.forEach ((item, id) => {const findItem = activeItems.find (newItem => === id); if (! findItem && item.sensor === ) {Messages.push ({payload: {service: service, data: {message:’clear_notification’, data: {tag: id}}}}); cachedItems.delete (id);}}) flow.set (‘ cachedItems’, cachedItems); // Send the notification as a stream message. ForEach ((msg) => node.send (msg)); // All done node.done (); Enter full screen mode Full screen mode Exit bottom flow Find clear notifications Search in cache If found, call delete_alarm / timer service Delete items from cache constantcachedItems = flow.get (‘cachedItems’); const defaults = flow.get (‘ defaults’); // Search for cleared items constfindItem = cachedItems.get (msg.payload.event.tag); if (! findItem) {return null} node.send ({payload: {service: default)[findItem.type].deleteService, data: {entity_id: findItem.sensor,
[defaults[findItem.type].id]:}}}) // Clean up cachedItems.delete ( ;. flow.set (‘cachedItems’, cachedItems); node.done (); Enter full screen mode Exit full screen mode Usage Import subflow with NR: Next, edit the environment variables for the service. Add a subflow and connect some alarm and timer sensors as events_state nodes. When all is done, create an alarm / timer on your Google Home device and try it out. You will receive a notification on your smartphone within seconds.

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