code: def read_ambient(self, timeout_sec=1):
          
          # Ask for an ambient measurement and wait for the response.
          self._device.write8(VCNL40xx_COMMAND, VCNL40xx_MEASUREAMBIENT)
          self._wait_response(VCNL40xx_AMBIENTREADY, timeout_sec)
          # Return the ambient response.
          return self._device.readU16BE(VCNL40xx_AMBIENTDATA)
docs: Read the ambient light sensor and return it as an unsigned 16-bit value.