User's Manual

9XTend™ OEM RF Module - Product Manual v2.x6x
© 2010 Digi Internatonal, Inc. 61
Table 5-05. Serial Interfacing
AT 
Command
AT Command Name Parameter Range
Com-
mand 
Category
# Bytes
Return
ed
Factory
Default
AP
API Enable. Set/Read the API mode of the
radio.
0 – 2
0 = API Disabled
1 = API-enabled
2 = API-enabled
(w/escaped control characters)
Serial
Interfacing
10
BD
Interface Data Rate. Set/Read the serial
interface data rate (baud rate) used between
the RF module and host.
0 - 8 (standard rates)
0 = 1200 bps
1 = 2400
2 = 4800
3 = 9600
4 = 19200
5 = 38400
6 = 57600
7 = 115200
8 = 230400
0x39 - 0x1C9C38 (non-standard
rates)
Serial
Interfacing
4
3
(9600 baud)
CD
GPO2 Configuration. Select/Read the
behavior of the GPO2 line (pin 3).
0 – 4
0 = RX LED (when data is received

whether or not the address is valid.)
1 = Assert RX LED
2 = De-assert RX LED
3 = (reserved)
4 = RX LED (valid address only)
Serial
Interfacing
12
CS
GPO1 Configuration. Select/Read the
behavior of the GP01 pin (pin 9)
0 – 4
0 = RS-232 CTS flow control
1 = RS-485 TX enable low
2 = CTS always High
3 = RS-485 TX enable high
4 = CTS always Low
Serial
Interfacing
10
FL
Software Flow Control. Enable/Disable
software flow control (XON/XOFF).
0 – 1
0 = Disabled
1 = Enabled
Serial
Interfacing
10
FT
Flow Control Threshold. Set/Read the flow
control threshold. When FT b
ytes have
accumulated in the DI buffer (UART Receive),
CTS is de-asserted or the XOFF software flow
control character is transmitted.
0x10 – 0x17E
[Bytes]
Serial
Interfacing
2
0x16D 
(365
decimal)
NB Parity. Select/Read parity settings.
0 – 4
0 = No parity
1 = 8-bit even
2 = 8-bit odd
3 = Forced high
4 = Forced low
Serial
Interfacing
10
RB
Packetization Threshold. Set/Read the
character threshold value. RF transmission
begins after receiving RB bytes, or after
receiving at least 1 byte and detecting RO
character times of silence on the UART.
0 – 0xD3
[Bytes]
Serial
Interfacing
2
0xC8 
(200
decimal)