Shandong USR IOT Technology Limited USRGM3 用户手册
USR-GM3/GM3s User Manual
Jinan USR IOT Technology Limited
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tec@usr.cn
Interpretation of bits parameters
Bits
Interpretation
Value
Description
1:0
Data bits
00
Not Used
01
Not Used
10
7
11
8
2
Stop bits
0
1
1
2
3
Enable/disable parity
0
disable
1
enable
5:4
Parity type
00
ODD
01
EVEN
10
Not Used
11
Not Used
7:6
No defined
00
Not Used
5.
5.
5.
5. Parameters
Parameters
Parameters
Parameters Setting
Setting
Setting
Setting
Sending AT commands is the only way to set the parameters of GM3 module. There are two
kinds of commands, basic AT commands and extended AT commands.
kinds of commands, basic AT commands and extended AT commands.
Item
Head
Baud Rate
Bits Parameters
Check Sum
bytes
3
3
1
1
interpretation
Fixed
data
MSB
Refer to the
following table
Sum of Baud Rate
and Bits Parameters
Exmaple1
(115200,N,8,1)
55 AA 55
01 C2 00
83
46
Exmaple2
(9600,N,8,1)
55 AA 55
00 25 80
83
28