This function is enabled at the time of product shipment. To enable the write
function
of a specific parameter, such as offset calibration, reset accumulated
flow rate
, or reset the timer, the user needs to send 0xAA55 to the register
0x00FF, and then the write function will be enabled (write protection is
disabled). After the write execution is completed, the firmware will
automatically re-enable the write protection.
Note: Only Address and Baud rate will not be write-protected.