This works for both local and cloud BLynk servers. For local, wss:// works if you ve got a certificate installed on Blynk server. For cloud Blynk server, only non ssl, ws:// works for the time being, as there is no SSL cert installed. You can use ws://blynk-cloud.com:8080/websockets as the server url. Supports both SSL wss:// and non secured ws:// connection to local server.