.
Device ID Function id Start Address Destination CRC16
01 06 00 66 00 02 E8 14
Read and Modify Baud Rate
Read baud rate
The device default factory baud rate is 9600. If you need to change it, you can change it according to the following
table and the corresponding communication protocol . For example, read the current device’s baud rate ID, the
command is:01 03 00 67 00 01 35 D5 , its format is parsed as follows. Read the baud rate encoding of the current
devic e. Baud rate encoding: 1 is 2400; 2 is 4800; 3 is 9600; 4 is 19200; 5 is 38400; 6 is 115200.
For the correct query command, the device will respond, for example the response data is: 01 03 02 00 03 F8 45,
the format of which is as shown in the followin g table:
Device ID Function id Start Address Data Length CRC16
01 03 00 67 00 01 35 D5
Change the baud rate
For example, changing the baud rate from 9600 to 38400 , ie changing the code from 3 to 5, the command is: 01
06 00 67 00 05 F8 1601 03 00 66 00 01 64 15 .
Device ID Function id Data Length Rate ID CRC16
01 03 02 00 03 F8 45
Read Correction Value
Read Correction Value
When there is an error between the data and the reference standard, we can reduce the display error by adjusting
the correction value. The correction difference can be modified to be plus or minus 1000, t hat is, the value range
is 0 1000 or 64535 65535. For example, when the display value is too small, we can correct it by adding 100. The
command is: 01 03 00 6B 00 01 F5 D6 . In the command 100 is hex 0x64 If you need to reduce, you can set a
negative val ue, such as 100, corresponding to the hexadecimal value of FF 9C, which is calculated as 100
65535=65435, and then converted to hexadecimal to 0x FF 9C. The correction value starts from 00 6B. We take
the first parameter as an example. The correction valu e is read and modified in the same way for multiple
parameters.
Device ID Function id Start Address Data Length CRC16
01 03 00 6B 00 01 F5 D6
For the correct query command, the device will respond, for example the response data is: 01 03 02 00 64 B9 AF,
the format of which is as shown in the following table:
Device ID Function id Data Length Data value CRC16
01 03 02 00 64 B9 AF