Keyboard functions for electron not working

Firmware
1 
STARTUP(Keyboard.begin());
SYSTEM_THREAD(ENABLED);
SYSTEM_MODE(MANUAL);

void setup() {

  Keyboard.press(KEY_LEFT_WINDOWS);
  Keyboard.press(KEY_LALT);
  Keyboard.press(KEY_DELETE);
  Keyboard.releaseAll();

  //Keyboard.click(KEY_DELETE, MOD_LCTRL | MOD_LALT);
    pinMode(D7, OUTPUT);
    digitalWrite(D7, LOW);
 
}

void loop() {

Keyboard.println("Hello world!");
digitalWrite(D7, HIGH);
delay(500);
digitalWrite(D7, LOW);
delay(500);

}

Tested on Windows 8 and 10 with DeviceOS 1.0.0 and 0.7.0.
Also tested with and without SYSTEM THREAD.

2

What specifically “isn’t working”? What was the intent? As far as I know WINKEY+ALT+DELETE doesn’t do anything on a Windows PC. And if it did anything, you could try adding a delay before the key presses… you might be sending the keys before windows attaches the USB device.

3

In C++ there is no guaranteed order for class constructors. Placing Keyboard.begin() in STARTUP() is not prudent. Instead, put it as the first statement in setup().

4

The docs do suggest using STARTUP() and USB HID should be a “native” object without dependencies to high level objects - if it were I’d expect to see an SOS panic.

However, I can confirm that USB HID Keyboard and Mouse are broken for both Electron and Photon on Windows machines that also have the Particle drivers installed, but on a “virgin” machine it seems to work.
The device is not even recognised as USB HID device when plugged in.

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