In a previous post I showed a wake-up light using Home Assistant and the default YAML configuration. In this post I’ll show my current setup which makes use of Node-RED.
As with my previous system, this wake-up light’s function is to light up my complete bedroom just before I need to wake up. The system works with any smart lamp that is compatible with HA, this includes Philips Hue and IKEA Tradfri lamps. I use it with a few GU10 bulbs (like the Hue GU10 lights). If you want you could even use some color-enabled bulbs to include a nice color transition mimicking a sun rise.
In this post I’ll show you how to build this system. The automation will be configurable (on/off, time) and has a switch to disable it on weekends.
Example hardware
I’ve used the following components for my Wake-up light:
- Home Assistant and Node-RED running on a Raspberry 3B+ using Hass.io
- Conbee Zigbee hub; there is a USB version and a PI version. (More info here)
- Three GU10 Zigbee smart lights. I use 3 Innr GU10 lights(not available in the US) but you could also use something like the lights from Philips Hue.
These components are just an example. A minimum requirement is a device that runs Home Assistant and Node-RED, and a smart light that you can control.
My Home Automation hardware setup
Dashboard widget
For controlling the settings of the wake-up light I use the same widget as with my previous post. Please see that post if you would like to read more of the details.
The system requires three inputs:
- An
input_booleanto enable or disable the system. - A second
input_booleanto enable or disable the system on weekends. - A
input_datetimeto set the time of the wake-up light.
# configuration.yaml
input_boolean :
wakeup_enabled:
name: "Wake-up lights"
initial: on
icon: mdi:theme-light-dark
wakeup_weekend:
name: "Enable Wake-up on weekends"
initial: off # I disable the system on default on weekends
icon: mdi:calendar-blank
input_datetime:
wakeup_time:
name: "Start lights at"
has_time: true
has_date: false
initial: "07:20"
Note: If you want to persist the values between restarts of Home Assistant remove the ‘initial’ value from the configuration.
The controls can be combined in a single view (or you can do this through the Lovelace ui editor):
# groups.yaml
alarm_clock:
name: "Wake-up Lights"
entities: # Add all entities here that should be part of the widget
- input_datetime.wakeup_time
- input_boolean.wakeup_enabled
- input_boolean.wakeup_weekend
Building the flow
Scheduling
The first step in our flow is reading the wakeup_time from Home Assistant. This time is then passed on to a schedex node. The schedex node is a easy-to-use node to start something at a configurable time. An alternative is BigTimer but for something simple as this I prefer schedex. The schedex node sends a message at a specific time that can be configured. This perfectly matches our requirements as we would like to start the wake-up light at a configurable time (without changing the flow each time the time changes).
To configure the schedex trigger, we have to send a payload with the new time to the schedex node when the wake-up time changes in Home Assistant. Schedex requires a specific payload format so I use simple function node (the parse time node in the image) to map the data from Home Assistant tot he correct format:
new_msg = {
payload: {
ontime: msg.payload.substr(0,5),
offtime: msg.payload.substr(0,5)
}
}
return new_msg;
These three nodes make sure that: 1) each time we change the wake-up time in HA the schedex node is updated and 2) the schedex node triggers a message at the configured time.
The configuration of the schedex node can be used to set some default values. I let the node send an ‘off’ message 60 minutes after the wake-up time started; you could use such an off message to run some additional automations.
Enable/disable the wake-up light
The wake-up light can be disabled or only enabled on week days. To implement these requirements we add a filter after the schedex node that checks if the requirements are met.
To implement this filter I make use of a function node that uses Javascript to get the day of the week. The node returns true as the payload if the current day is a weekend day. In Javascript ‘6’ is a Saturday and Sunday ‘0’.
// Contents of the "Day of the week" function node
var day = new Date().getDay();
var isWeekend = (day === 6) || (day === 0);
return {
payload: isWeekend,
};
The output of the function node can then be routed using a switch node:
Controlling the lights
The last step is to connect the output of the “Enabled?” node to a sequence that controls the lights. You can go wild here and create something based on the light setup in your bedroom. In my case I start the lights at 1% brightness and then slowly increase the brightness for 30 minutes. After 30 minutes, when all the lights are at max brightness, it further sets my home to a ‘morning’ state and turns on lights in other parts of the house.
In my example I use a template node to slowly increase the brightness of the lights:
{{ [250, state_attr('light.bedroom', 'brightness') + 9] | min }}
Complete flow and source code
Connecting all components and my light control nodes results in the complete flow as shown below:
To get started with this setup you can use the json source code of my nodes and customize them to fit your needs. At a minimum you need to change the entities of the lights that you would like to control.
Source code of nodes used in this post
[[{"id":"d228445d.4259f8","type":"function","z":"556ecca6.827b14","name":"Get day of week","func":"var day = new Date().getDay();\n\nvar isWeekend = (day === 6) || (day === 0); \n\nreturn {\n payload: isWeekend,\n};","outputs":1,"noerr":0,"x":260,"y":1420,"wires":[["ba532104.74a48"]]},{"id":"ba532104.74a48","type":"switch","z":"556ecca6.827b14","name":"Is it weekend?","property":"payload","propertyType":"msg","rules":[{"t":"true"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":260,"y":1460,"wires":[["e7a99d1f.bdef"],["e25ce15f.614ee"]]},{"id":"e7a99d1f.bdef","type":"api-current-state","z":"556ecca6.827b14","name":"Enabled on weekends?","server":"161bb087.35566f","halt_if":"off","halt_if_type":"str","halt_if_compare":"is","override_topic":true,"override_payload":true,"override_data":true,"entity_id":"input_boolean.wakeup_weekend","state_type":"str","outputs":2,"x":530,"y":1420,"wires":[["e25ce15f.614ee"],[]]},{"id":"e25ce15f.614ee","type":"api-current-state","z":"556ecca6.827b14","name":"Enabled?","server":"161bb087.35566f","halt_if":"off","halt_if_type":"str","halt_if_compare":"is","override_topic":true,"override_payload":true,"override_data":true,"entity_id":"input_boolean.wakeup_enabled","state_type":"str","outputs":2,"x":480,"y":1460,"wires":[["7db42b.e3de6bd4"],[]]},{"id":"7db42b.e3de6bd4","type":"api-call-service","z":"556ecca6.827b14","name":"1%","server":"161bb087.35566f","service_domain":"light","service":"turn_on","data":"{\"entity_id\":\"light.bedroom\",\"brightness\":1}","render_data":false,"mergecontext":"","output_location":"payload","output_location_type":"msg","x":230,"y":1600,"wires":[["5f30d3cb.1aadac"]]},{"id":"5f30d3cb.1aadac","type":"looptimer","z":"556ecca6.827b14","duration":"1","units":"Minute","maxloops":"30","maxtimeout":"35","maxtimeoutunits":"Minute","name":"","x":300,"y":1640,"wires":[["de710702.9a2d98"],[]]},{"id":"de710702.9a2d98","type":"api-render-template","z":"556ecca6.827b14","name":"Get new light setting","server":"161bb087.35566f","template":"{{ [250, state_attr('light.bedroom', 'brightness') + 9] | min }}","x":360,"y":1680,"wires":[["3df7037a.2f373c"]]},{"id":"3df7037a.2f373c","type":"api-call-service","z":"556ecca6.827b14","name":"Increase light","server":"161bb087.35566f","service_domain":"light","service":"turn_on","data":"{\"entity_id\":\"light.bedroom\",\"brightness\":\"{{ payload }}\"}","render_data":true,"mergecontext":"","output_location":"payload","output_location_type":"msg","x":370,"y":1720,"wires":[[]]},{"id":"df372079.83747","type":"server-state-changed","z":"556ecca6.827b14","name":"Wake up time input","server":"161bb087.35566f","entityidfilter":"input_datetime.wakeup_time","entityidfiltertype":"substring","outputinitially":true,"state_type":"str","haltifstate":"","halt_if_type":"","halt_if_compare":"is","outputs":1,"x":230,"y":1200,"wires":[["47ca214a.cd1c1"]]},{"id":"47ca214a.cd1c1","type":"function","z":"556ecca6.827b14","name":"Parse time","func":"new_msg = {\n payload: {\n ontime: msg.payload.substr(0,5),\n offtime: msg.payload.substr(0,5)\n }\n}\nreturn new_msg;","outputs":1,"noerr":0,"x":250,"y":1280,"wires":[["cfe7b8ae.660428"]]},{"id":"cfe7b8ae.660428","type":"schedex","z":"556ecca6.827b14","name":"Trigger at time","suspended":false,"lat":"","lon":"","ontime":"7:30","ontopic":"","onpayload":"on","onoffset":0,"onrandomoffset":0,"offtime":"12:00","offtopic":"","offpayload":"off","offoffset":"60","offrandomoffset":0,"mon":true,"tue":true,"wed":true,"thu":true,"fri":true,"sat":true,"sun":true,"x":440,"y":1280,"wires":[["b361dc76.e4a18"]]},{"id":"b361dc76.e4a18","type":"switch","z":"556ecca6.827b14","name":"is on","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"on","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":590,"y":1280,"wires":[["d228445d.4259f8"]]},{"id":"235e234a.7b2aac","type":"comment","z":"556ecca6.827b14","name":"Time setting input","info":"","x":230,"y":1160,"wires":[]},{"id":"b938cf54.1bdd3","type":"comment","z":"556ecca6.827b14","name":"Trigger at the configured time","info":"","x":480,"y":1240,"wires":[]},{"id":"5a93ca40.9dd574","type":"comment","z":"556ecca6.827b14","name":"Check if the wake-up light should be enabled on this day of the week","info":"","x":390,"y":1360,"wires":[]},{"id":"e34ba2ee.19df8","type":"comment","z":"556ecca6.827b14","name":"Run the wake-up sequence","info":"","x":260,"y":1520,"wires":[]},{"id":"161bb087.35566f","type":"server","z":"","name":"Home Assistant"}]
Questions? Feedback? Feel free to add them to the comments of this post.