Serial to Ethernet module USR-TCP232-T24 series
http://en.usr.cn
Jinan USR IOT Technology Limited
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agreement like that, but not standard RFC2217, it is more sample and easy than RFC2217.
1.When module receive setup command, if is a valid command(right packet head and right checksum),
the module will change self setting and answer nothing, else the data bits would be sent out at com port.
2.TCP Client, TCP Server, UDP Client, UDP Server, UDP broadcast support this function.
3.All changes will work at once, but not save to module, when power off will lose the settings.
USR-TCP232-Setup V4.2.1 and later version support this function. Like follow picture.
The command length is 8 bits, detail as follow table. The demo bytes are in hex mode:
Name
Packet
header
Band rate
UART bits setting
Check sum
Bytes
3
3
1
1
Description
Three bytes
Band rate in hex
mode, High byte first.
Parity/data/stop
settings, see follow
table.
Check sum of
last 4 bytes
For example
(115200,N,8,1)
55 AA 55
01 C2 00
83
83
For example
(9600,N,8,1)
55 AA 55
00 25 80
83
83
