Hello Everyone, I am testing Blynk for my students so they can use it in a project. I have followed the instructions but the app is not connecting to the Arduino via USB I have entered the details via the Terminal on the Mac and seems to be connecting to the correct port.
Also checked logs from mobile device and found this error log:
2019/05/12 14:03:44:618 App sent net op 7101 with error: Error Domain=kACNetworkManagerErrorDomain Code=7 "Hardware is offline" UserInfo={NSLocalizedDescription=Hardware is offline, NSLocalizedFailureReason=Error}
Here is what the board is doing: https://youtu.be/WRbLWI2PLDk
Arduino UNO without Shield
• Smartphone OS (iOS ) 12.2
• Blynk server or local server? ( How can I tell?)
• Blynk Library version VO 6.1
• Add your sketch code. 
Code should be formatted as example below.
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Download latest Blynk library here:
https://github.com/blynkkk/blynk-library/releases/latest
Blynk is a platform with iOS and Android apps to control
Arduino, Raspberry Pi and the likes over the Internet.
You can easily build graphic interfaces for all your
projects by simply dragging and dropping widgets.
Downloads, docs, tutorials: http://www.blynk.cc
Sketch generator: http://examples.blynk.cc
Blynk community: http://community.blynk.cc
Follow us: http://www.fb.com/blynkapp
http://twitter.com/blynk_app
Blynk library is licensed under MIT license
This example code is in public domain.
*************************************************************
=>
=> USB HOWTO: http://tiny.cc/BlynkUSB
=>
You can send/receive any data using WidgetTerminal object.
App project setup:
Terminal widget attached to Virtual Pin V1
*************************************************************/
/* Comment this out to disable prints and save space */
#define BLYNK_PRINT SwSerial
#include <SoftwareSerial.h>
SoftwareSerial SwSerial(10, 11); // RX, TX
#include <BlynkSimpleStream.h>
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "75f4d24ceee84765ab01df9d771994c6";
// Attach virtual serial terminal to Virtual Pin V1
WidgetTerminal terminal(V1);
// You can send commands from Terminal to your hardware. Just use
// the same Virtual Pin as your Terminal Widget
BLYNK_WRITE(V1)
{
// if you type "Marco" into Terminal Widget - it will respond: "Polo:"
if (String("Marco") == param.asStr()) {
terminal.println("You said: 'Marco'") ;
terminal.println("I said: 'Polo'") ;
} else {
// Send it back
terminal.print("You said:");
terminal.write(param.getBuffer(), param.getLength());
terminal.println();
}
// Ensure everything is sent
terminal.flush();
}
void setup()
{
// Debug console
SwSerial.begin(9600);
// Blynk will work through Serial
// Do not read or write this serial manually in your sketch
Serial.begin(9600);
Blynk.begin(Serial, auth);
// This will print Blynk Software version to the Terminal Widget when
// your hardware gets connected to Blynk Server
terminal.println(F("Blynk v" BLYNK_VERSION ": Device started"));
terminal.println(F("-------------"));
terminal.println(F("Type 'Marco' and get a reply, or type"));
terminal.println(F("anything else and get it printed back."));
terminal.flush();
}
void loop()
{
Blynk.run();
}