code: func (t *TM1638Driver) Start() (err error) {
  
  	t.pinStrobe.On()
  	t.pinClock.On()
  
  	t.sendCommand(TM1638DataCmd)
  	t.sendCommand(TM1638DispCtrl | 8 | 7)
  
  	t.pinStrobe.Off()
  	t.send(TM1638AddrCmd)
  	for i := 0; i < 16; i++ {
  		t.send(TM1638WriteDisp)
  	}
  	t.pinStrobe.On()
  
  	return
  }
docs: // Start initializes the tm1638, it uses a SPI-like communication protocol