Hardware Connected indication via HTTP API

Is there any way via the HTTP API to indicate that hardware is online? I’m writing custom code C# code on Windows that will read/write virtual pins via the HTTP API and I’d like to know that the hardware I am using is online.

You have to define that on your side in own code.

No… I don’t want to check that an Arduino is online. I want to notify Blynk server that my PC is online using HTTP API.

In that case we no such API. “Connected” means opened socket and logged in to Blynk Server.

But you can use any pin storage in that case for storing “flag”.