Last updated
Last updated
This widget simulates a common 16x2 LCD.
Simple mode - select or create a datastream of integer, double or string for the first and second lines of the display.
Advanced mode - select or create a single datastream of integer, double or string.
The widget has no controls.
SIMPLE - the datastream value is shown left justified on each line of the LCD. You can add text before and after the value displayed by navigating to ‘Design’ -> ‘FIRST LINE’ and then enter “/value1/ kg” excluding the double quotes. The datastream value of 3.14159 will be displayed as “3.14159 kg”.
ADVANCED - allows you to send clear and positioning commands just like those sent to a physical LCD. See sketch:
When widget is pressed, value is sent and stored into the Blynk.Cloud. After that it's sent to your device.
For the widget configured in Simple mode and datastream V1 assigned to the LCD line 1, and V2 assigned to the LCD line 2:
For the widget configured in Advanced mode and datastream V1 of data type string assigned to the LCD:
You can change the value of the datastream assigned to the widget with the hardware or HTTP API. For the widget configured in Simple mode and datastream V1 assigned to the LCD line 1, and V2 assigned to the LCD line 2:
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=V1&color=%23D3435C
https://blynk.cloud/external/api/update/property?token=GVki9IC70vb3IqvsV0YD3el4y0OpneL1&pin=V1&isDisabled=true
You cannot use Blynk.virtualWrite() or HTTP API with the LCD widget in advanced mode because the changes to the datastream will not be reflected in the LCD widget. You must use the functions as demonstrated in the sketch .
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:
You can change the properties 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.
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.