Product manual
XStream‐PKG‐R™RS‐232/485RFModem–ProductManualv4.2B
©2005MaxStream,Inc.Confidential&Proprietary 26
FL (Software Flow Control) Command
AT Command: ATFL
Binary Command: 0x07 (7 decimal)
Parameter Range: 0 – 1
Parameter
Value
Configuration
0
Disable software
flow control
1
Enable software
flow control
Default Parameter Value: 0
Number of bytes returned: 1
<Serial Interfacing> FL Command is used to
configure software flow control. Hardware flow
control is implemented with the XStream Modem
as the DO2 pin (
), which regulates when
serial data can be transferred to the modem. FL
Command can be used to allow software flow
control to also be enabled. XON character used is
0x11 (17 decimal). XOFF character used is 0x13
(19 decimal).
FT (Flow Control Threshold) Command
<Serial Interfacing> Set/Read the flow control
threshold. When FT bytes have accumulated in
the DI buffer,
is de-asserted or the XOFF
software flow control character is transmitted.
AT Command: ATFT
Binary Command: 0x24 (36 decimal)
Parameter Range: 0 – (Receiving modem DO
buffer size minus 0x11 bytes)
Default Parameter Value: Receiving modem DO
Buffer size minus 0x11
Number of bytes returned: 2
Minimum Firmware Version Required: 4.27B
GD (Receive Good Count) Command
<Diagnostics> Set/Read the count of good
received RF packets. Parameter value is reset to
0 after every reset and is not non-volatile (Value
does not persist in the modem’s memory after a
power-up sequence). Once the “Receive Good
Count” reaches its maximum value (up to
0xFFFF), it remains at its maximum count value
until the maximum count value is manually
changed or the modem is reset.
AT Command: ATGD
Binary Command: 0x10 (16 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0
Number of bytes returned: 2
Related Commands: ER (Receive Error Count)
HP (Hopping Channel) Command
<Networking> HP Command is used to set the
modem’s hopping channel number. A channel is
one of three layers of addressing available to the
XStream modem. In order for modems to
communicate with each other, the modems must
have the same channel number since each
network uses a different hopping sequence.
Different channels can be used to prevent
modems in one network from listening to
transmissions of another.
AT Command: ATHP
Binary Command: 0x11 (17 decimal)
Parameter Range: 0 – 6
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: DT (Destination Address),
ID (Modem VID), MK (Address Mask)