• Ok, please can you try:

    NRF.sendHIDReport([kb.MODIFY.LEFT_GUI,0,­0,0,0,0,0,0], function() {
      NRF.sendHIDReport([kb.MODIFY.LEFT_GUI | kb.MODIFY.LEFT_ALT,0,0,0,0,0,0,0], function() {
        NRF.sendHIDReport([kb.MODIFY.LEFT_GUI | kb.MODIFY.LEFT_ALT,0,kb.KEY.A,0,0,0,0,0]­, function() {
          NRF.sendHIDReport([0,0,0,0,0,0,0,0], function() {
          });
        });
      });
    });
    // or...
    NRF.sendHIDReport([kb.MODIFY.LEFT_GUI,0,­0,0,0,0,0,0], function() {
      NRF.sendHIDReport([kb.MODIFY.LEFT_GUI,kb­.MODIFY.LEFT_ALT,0,0,0,0,0,0], function() {
        NRF.sendHIDReport([kb.MODIFY.LEFT_GUI,kb­.MODIFY.LEFT_ALT,kb.KEY.A,0,0,0,0,0], function() {
          NRF.sendHIDReport([0,0,0,0,0,0,0,0], function() {
          });
        });
      });
    });
    

    It's possible one of those will work?

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