Alarm & Sound Widget
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The alarm and sound widget creates an alarm in the Blynk.Console. It is triggered by a datastream value other than zero (0).
Select or create a datastream of .
You can change the ‘label’ property of the widget from your , or via an .
The alarm and sound widget has the following controls:
On / Off: Disables (mutes) the alarm, or resets it.
Alarm Sound: When the ‘Allow end-user to change the sound’ widget option is enabled, the user can select the alarm sound to be played when the alarm is triggered.
or
Any integer value other than zero (0) will trigger the alarm. The alarm can be disabled by changing the datastream value to zero (0) by using the Blynk.virtualWrite()
command.
Find full code examples of using Blynk.virtualWrite()
for your hardware .
You can change certain properties of the widget from your hardware using the command:
Where:
vPin
is: virtual pin number the widget is assigned to
widgetProperty
: property you want to change
propertyValue
: value of the property you want to change
Don't put Blynk.setProperty()
into the void loop()
as it can cause a flood of messages and your hardware will be disconnected. Send such updates only when necessary, or use timers.
Get the latest known value from the server. For example, after your hardware went offline and then came online again.
You can change the properties “label”, “isHidden” and “isMuted” of the widget from your , or via an . The “isMuted” property is unique to the Alarm and Sound widget and will enable or disable the mute option for the Alarm and Sound widget.