Terminal
Displays the assigned datastream of data type string values since the app was last refreshed in a scrolling list. It optionally provides a text input area for the user to assign new values to the assigned datastream. Special commands are available for the hardware to assign data to the datastream using the print/println/write methods. Note that the terminal display is cleared with every app refresh.
Datastream
Select or create a datastream of data type string.
Widget Controls
The widget has the following controls:
Scroll - drag the display area vertically to scroll the contents.
Text input field: When ‘Input Line’ in settings is enabled, the text input field is displayed and allows the user to enter text that will update the assigned datastream. Note that any user input will have a “>” character before it in the widget display to differentiate it from values obtained from the datastream.
Widget Settings
Input line - when enabled, the text input area below the display is shown.
Add new line - when enabled, a new line (CrLf) is added after content is entered into the text area.
Autoscroll - when enabled, datastream content will be automatically scrolled to show the latest at the bottom of the display area.
How to process widget with the hardware
The datastream value displayed is updated whenever the value stored on Blynk.Cloud changes.
Reading the widget value(s)
For a datastream of data type string assigned to V1:
Changing the datastream value(s)
You can change the value of the datastream assigned to the widget with the hardware or HTTP API. For a datastream of data type string assigned to V1:
Hardware:
Or you can use the following special functions for this widget:
HTTP API:
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 timers.
Sketch: Terminal
Sketch: Basic Sketch
Sketch: Set Property
Sketch: VirtualPinWrite
Sketch: VirtualPinRead
Change Widget Properties
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 towidgetProperty
: property you want to changepropertyValue
: 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.
Properties you can change
You can change the properties label, color, isDisabled, isHidden of the widget from your hardware, or via an HTTP API. 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.
Change Widget Label
Set Widget Color
Disable/Enable
Widget will be greyed out on UI and users won't be able to tap on it.
Show/Hide
Widget will be hidden from dashboard. Design your UI so that it doesn't look weird when there is no widget.
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=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
Path Parameters
Query Parameters
{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
Sync to the latest known state
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 State Syncing for more details.
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