It’s getting darker and gloomier here in the northern hemisphere, especially in the United Kingdom where natural light is out past 6 PM. Since these conditions are not going to improve anytime soon (at least not until Spring), let’s use Tasker and the Yeelight Smart RGB LED bulb to emulate a sunset and a sunrise on demand.
Sounds like a good plan! If you want to know more about the Yeelight Smart RGB bulb check out this post. In short, this WiFi light comes with Tasker integration, so there is no need for hacks. It supports Amazon Alexa and Google Assistant too! I’ll show you how to trigger an artificial sunset when the phone is flipped upside-down and how to create an alarm that will gradually enable the lights in your room.
Tasker and Yeelight Sunset and Sunrise behavior
To save myself some hassle I’m using the Twilight app for its Tasker plugin which tells Tasker if it is day or night. I have a night and day trigger which sets the variable %Sunlight to the corresponding values. I’m going to use these to control the Tasker and Yeelight triggers.
TASKER PROFILE Twilight Sunrise/Sunset
Profile: Sunlight Day State: Twilight [ Configuration:From SUNRISE to SUNSET at Device location. ] Enter: Sunlight Operator+ A1: Variable Set [ Name:%Sunlight To:day Recurse Variables:Off Do Maths:Off Append:Off ] Profile: Sunlight Night State: Twilight [ Configuration:From SUNSET to SUNRISE at Device location. ] Enter: Sunlight Operator- A1: Variable Set [ Name:%Sunlight To:night Recurse Variables:Off Do Maths:Off Append:Off ]
Since Yeelight app comes with pretty neat presets, we can use it to create the Sunset behavior. The preset lasts 15 min and goes from warm orange/red through dim colors to finally a complete blackout.
TASKER PROFILE – Sunset
Profile: Sunset State: Orientation [ Is:Face Down ] State: Wifi Connected [ SSID:FASTBERRY MAC:* IP:* Active:Yes ] State: Variable Value [ %Sunlight ~ night ] Enter: Sunset A1: Yeelight Device [ Configuration:Device: lamp, Action: SCENE, Param: 70 Timeout (Seconds):0 ]
In my scenario, I used the WiFi information and value of %Sunlight to prevent the Yeelight smart bulb from switching the sunset mode accidentally. Feel free to assign another trigger or a voice command.
Sunrise behavior is best combined with a set alarm. In my scenario, I turn on the light 5 minutes before the alarm would go off. The light stays dim at first, then changes color and brightness over next 15 minutes until it reaches the full intensity.
Tasker and Yeelight alarm
I used AutoTools to get the proper time picker dialog. If you would rather create a scene, feel free to do so. You could also link this to a voice command. Whatever suits you, it’s great as long as you get the time in the 15:43 format.
TASKER TASK – Alarm
Alarm A1: AutoTools Dialog [ Configuration:Dialog Type: Date And Time Pick Time: true Time Picker Title: Set alarm Format: HH:mm Date Format Separator: , Timeout (Seconds):60 ] A2: Variable Set [ Name:%Sunrise1 To:%atdatetimeseconds-300 Recurse Variables:Off Do Maths:On Append:Off ] A3: Variable Set [ Name:%Sunrise2 To:%atdatetimeseconds-300 Recurse Variables:Off Do Maths:On Append:Off ] A4: Variable Split [ Name:%atdatetime1 Splitter:: Delete Base:Off ] A5: Set Alarm [ Hours:%atdatetime11 Minutes:%atdatetime12 Label:With lamp Sound: Vibrate:Default Confirm:Off ]
The time set via AutoTools is available in seconds, we can use it directly to assign the values of %Sunrise1 and %Sunrise2 (we need this to create the time context and bypass any time issues).
To set the alarm, however, we will need the hours and minutes provided to us separately. We can split the existing variable %atdatetime1 with “:” as shown in A4. Once this is done, we have %atdatetime11 for hours and %atdatetime12 for minutes.
It’s time (no pun intended) to set the context and trigger the Yeelight. The action is simple, pick the Yeelight action and set the scene to Sunrise. As per context, use time, and assign %Sunrise1 and %Sunrise2.
TASKER PROFILE – Sunrise
Profile: Sunrise Time: From %Sunrise1 Till %Sunrise2 State: Variable Value [ %Sunlight ~ night ] Enter: Sunrise A1: Yeelight Device [ Configuration:Device: lamp, Action: SCENE, Param: 68 Timeout (Seconds):0 ]
Conclusion and Download
As you can see, Tasker and Yeelight are almost a match made in heaven. The light looks great when you go to sleep and hopefully it will reduce some stress of getting up early. I have passed on feedback to the Yeelight team in regards to support for Tasker variables. It would be nice to have the brightness, color, and scenes accessible with the variables.
Download the above ZIP file and extract the contents onto the internal storage of your Android device. Open up Tasker and disable “Beginner Mode” in Preferences. Then, go back to Tasker’s main page and long-press on the home icon in the bottom left corner. You will see an option to “import” a project. Tap that option then find the .prj.xml file you extracted earlier. Once imported, you will see a new tab at the bottom alongside the default home icon in Tasker. This contains the profiles and tasks of this helper project.
Rojenx is a leading concept artist who work appears in games and publications
Check out his personal gallery here