Terminal

Note: please remember that web and mobile app widgets are set up separately in the Web Dashboard and Mobile App Dashboard sections correspondingly. They can still use the same datastreams to access the same data (Map widget is an exception – a different codebase is used for Map on mobile and web).

Terminal widget works like the usual system terminal. The widget is showing real-time data from your hardware through a string datastream. Allows sending any string to your hardware.

Settings

Datastream

Only String datastream can be used here.

Input hint

Textual hint for the input field

Auto scroll

Enable/disable automatic scrolling to the bottom when new values are coming

Show input

Show/hide input field in the terminal widget

Colors

You can set screen and text colors too

How to send data from a device

Terminal shows any string messages your hardware has sent to Blynk Cloud recently. For example, you can send logs from virtual pin V1 :

Blynk.virtualWrite(V1, "Log 1"); // send first log
Blynk.virtualWrite(V1, "Log 2"); // send second

Don't put Blynk.virtualWrite() into the void loop() as it can cause a flood of messages and your hardware will be disconnected from the server for spam. Send such updates only when necessary.

Get data using Blynk library

For terminal you can use regular Blynk virtual pin operations:

//to get the value from the terminal text input
BLYNK_WRITE(V1) {
   String string = param.asStr();
}

//to send the value to terminal
//max length for the 1 terminal message is 255 chars
Blynk.virtualWrite(V1, value)

Send data using HTTP API

Please check this article https://docs.blynk.io/en/blynk.cloud/update-datastream-value