User manual

Chapter Four Configuration
Page 41 © January 2011
Response from 905U-D OK
Save configuration AT&W
Exit command mode ATO
Note that some commands will automatically exit command mode. Several commands can be
run together, for example, ATB2&WO is the same as ATB2 and AT&W and ATO
Prior to Configuration
Before configuring a module initially, force the module to its factory default configuration -
either by using the DIP switches (refer section 4.3), or by using the AT&F command. If you
are making a change to an existing configuration, this step is not necessary.
Appendix A details all of the Hayes commands accepted by the 905U-D. The following
commands are the most common.
Configuration of addressing
AT&S
System Address Range 0-255 Default set by factory.
AT&G
Group Address Range 0-255. Default 1
AT&U
Unit Address Range 0-127. Default 1. This is also the second group
address for transparent repeaters.
Configuration of Data Rates and Character Type
ATB
Radio Baud Rate
The radio rate must be the same in all modules
B0
19,200 baud (default)
B2
115,200 baud
B1 57,600 baud
ATC Serial Baud Rate The serial rate can be different
C0 115,200 baud
C1 1200 baud C7 28,800 baud
C2 2400 baud C8 31,250 baud
C3 4800 baud C9 38,400 baud
C4 9600 baud (default) C10 57,600 baud
C5 14,400 baud C11 76,800 baud
C6 19,200 baud C12 115,200 baud
AT&Bxx
Character Type (Data bits, Stop bits, Parity). “xx” is formed by adding the values
below. Default is 8 data bits / 1 stop bit / no parity.
0
7 Data Bits
0
No Parity
2
8 Data Bits
4
Zero Parity (Parity bit always zero)
0
1 Stop Bit
8
Odd Parity
1
2 Stop Bits
12
Even Parity