Datastream Value Widget
Displays the current datastream / virtual pin value. Units assigned to the datastream are also displayed. Labels may also be optionally added before and after the displayed value.
Settings
Datastream - Select or create a datastream of data type integer, double, enumerable or string.
Label - Set custom label before the value. E.g Temperature: /value/
Properties you can change
You can hide/show header widgets from device. Use isHidden property API:
Where:
vPin is: virtual pin number the widget is assigned to
isHidden: property that controls the widget visibility
propertyValue: value of the property you want to change. true and false values are supported.
Example:
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.
Change widget properties via HTTPs API
Updates the Datastream Property and all assigned Widgets
GET https://{server_address}/external/api/update/property?token={your 32 char token}&pin={your vPin}&{property}={value}
The endpoint allows you to update the Datastream Property value via GET request. All widgets (both web and mobile) that are assigned to this datastream will inherit this property. The Datastream Property is persistent and will be stored forever until you change it with another value. In order to clear the property you need to clear the device data in device actions menu.
Example:
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&isHidden=true
Path Parameters
| Name | Type | Description |
|---|---|---|
{server address}* | string | Get from the bottom right of your Blynk console. More information. |
Query Parameters
| Name | Type | Description |
|---|---|---|
token* | string | Device auth token from Device info |
pin* | string | The datastream virtual pin (should start with "v") |
{property} | string | The property of the widget you want to update: |
isHidden | string | true or false |
Last updated
