Image Gallery
Displays one or more images specified by a HTTPS URL. You can change the image shown by configuring a datastream of type integer and then changing the datastream value to correspond to the image URL index (beginning at 0). If only one image URL is assigned, then the datastream value is ignored. Make sure to encode the image URL.
Datastream
Select or create a datastream of data type integer.
Widget Controls
The widget has no controls.
How to process widget input on the device
The datastream value displayed is updated whenever the value stored on Blynk.Cloud changes.
Reading the widget value(s)
Changing the datastream value
You can update the assigned datastream value using the hardware or HTTP API. You can change the image shown by changing the datastream value to correspond to the image URL index (beginning at 0). If only one image URL is assigned, then the datastream value is ignored. Make sure to encode the image URL.
Hardware:
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: 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, 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
Change Opacity, Scale, Rotation
Change Images
Change the individual image by its index:
Change a list of URLs for the widget. First image will have index 0
, next 1
, and so on.
Make sure you not exceed the max string size of 255 chars when sending a long list of URLs
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.
Examples:
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&isDisabled=true
https://blynk.cloud/external/api/update/property?token={token}&pin={pin}&url={index}&url={url}
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&url=2&url=https://image%202.jpg
https://blynk.cloud/external/api/update/property?token={token}&pin={pin}&urls={url1}&urls={url2}&urls={url3}
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&urls=https://image%201.jpg&urls=https://image%202.jpg&urls=https://image%203.jpg
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: |
label | string | the text used as widget label |
isDisabled | string | true or false |
isHidden | string | true or false |
url | string | Replace image by its index. Indexes start from 0. URL should be urlencoded |
urls | string | Replace the whole set of images with the new set of URLs. The URLs should be urlencoded |
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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