SuperChart
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Visualize live and historical data in a chart from one or more datastreams. Applications include sensor data and binary event logging. The widget can handle multiple datastreams, shows the Y axis values, and supports the chart types of line, step, area, bar and state.
Also, see the that supports data aggregation options of average and sum as well as live data plotting.
Select or create a datastream of integer or double.
The widget has the following controls:
Time Ranges: tap to select a time range. These are configurable under the widget settings.
Full Screen: when enabled, the full screen icon will be displayed at the lower right of the widget. Tap to zoom the chart to the full screen.
The widget has extensive charting display options that are easily explored interactively with the preview. Chart types of line, step, area, bar, and binary are configurable for each datastream assigned.
You can read the latest values from the datastreams assigned to the widget. For datastream V1 of data type double:
To get the latest datastream value assigned to V1:
To get the historical values assigned to datastream V1:
You can change the value of the datastream assigned to the widget with the hardware or HTTP API. The widget works best with historical data sent on a constant interval.
For a datastream V1 assigned the data type of double.
Hardware:
HTTP API:
You can change certain properties of the Widget from your hardware. For that, use this 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.
Widget will be greyed out on UI and users won't be able to tap on it.
Widget will be hidden from dashboard. Design your UI so that it doesn't look weird when there is no widget.
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=V2&label=My%20Label
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&color=%23D3435C
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&isDisabled=true
{server address}*
string
token*
string
pin*
string
{property}
string
The property of the widget you want to update: label
, color
, isDisabled
, isHidden
label
string
the text used as widget label
color
string
button color hexadecimal, must include the hash # character urlencoded as %23
isDisabled
string
true or false
isHidden
string
true or false
Don't put Blynk.virtualWrite()
into the void loop()
as it can cause a flood of messages and your hardware will be disconnected. Send such updates only when necessary, use flags, or .
Sketch:
Sketch:
Sketch:
Sketch:
You can change the properties label, color, isDisabled, isHidden of the widget from your hardware, or via an . The URL must be encoded, so spaces in labels must be replaced with %20, and color hexadecimal values in the HTTP API URL must include the hash # character urlencoded as %23.
Get from the bottom right of your Blynk console. .
Device from Device info
The datastream (should start with "v")
You can update your hardware to the latest datastream value from Blynk.Cloud after your hardware went offline, and then came online again. Use Blynk.syncVirtual()
to update a single virtual pin, or Blynk.syncAll()
to update all virtual pins. See for more details.