old_contents: # jeonghoonkang
  
  # http://www.eltsensor.co.kr/products-by-gas/co2/ndir/monitor?tpf=product/view&category_code=101012&code=22
  op = serial.openSerial('/dev/ttyUSB0', baudrate=38400, rtscts=True)
  
new_contents: # jeonghoonkang
  
  # http://www.eltsensor.co.kr/products-by-gas/co2/ndir/monitor?tpf=product/view&category_code=101012&code=22
  
  
  if __name__ == '__main__':
  op = serial.openSerial('/dev/ttyUSB0', baudrate=38400, rtscts=True)
  
subject: Update co2_elt_mt200.py