Waveshare RS232/485 TO WIFI POE ETH (B) User Manual page 72

RS232/485 TO WIFI POE ETH (B) User Manual
Starting from the parameter area (including the parameter area) and before the checksum byte,
add and take the last byte as the checksum byte.
The following is a specific application example: AAFD5500036100CC2D (Hex)
Among them, length byte 0004: is length 4
Reference number 6100:61- SocketA data
00- Network sends to serial devices
Data area CC: Data sent from network socket A
Checksum calculation: 61+00+CC=2D
Taking Socket as an example, the serial port device sends abc to Socket, and the network-side
Socket sends data 123 to the serial port device, as shown below:
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