XTH9-MI-128 Digi International/Maxstream, XTH9-MI-128 Datasheet - Page 25

• Manufacturer Part Number: XTH9-MI-128
• Description: MODULE RF 900MHZ 1W 115K W/MMCX
• Manufacturer: Digi International/Maxstream

Specifications of XTH9-MI-128

• Frequency: 900MHz
• Data Rate - Maximum: 230kbps
• Modulation Or Protocol: FHSS, FSK
• Power - Output: 30dBm
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Receiving: 80mA
• Current - Transmitting: 260mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Memory Size: -

XTend™ RF Module ‐ Product Manual v2.x6x
CN (Exit AT Command Mode) Command
CS (GPO1 Configuration) Command
CT (Command Mode Timeout) Command
DB (Received Signal Strength) Command
<Command Mode Options> The CN command is
used to explicitly exit the module from AT Com-
mand Mode.
<Serial Interfacing> CS Command is used to
select the behavior of the GP01 pin (pin 9). This
output can provide RS-232 flow control, control
the TX enable signal (for RS-485 or RS-422 oper-
ations).
By default, GP01 provides RS-232 CTS (Clear-to-
Send) flow control.
<Command Mode Options> The CT command is
used to set and read the amount of inactive time
that elapses before the module automatically
exits from AT Command Mode and returns to Idle
Mode.
Use the CN (Exit AT Command Mode) command
to exit AT Command Mode manually.
<Diagnostics> DB Command is used to read the
receive signal strength (in decibels relative to mil-
liWatts) of the last received packet. This parame-
ter is useful in determining range characteristics
of the RF modules under various conditions.
In default mode, this command shows the power
level in signed decimal format with the units (dBm). If CF = 1, the magnitude of the value is pre-
sented in unsigned hex. If CF = 2, the value is presented in decimal, but without the units.
Sample Output:-88 dBm(when ATCF = 0)
NOTE: If the DB register is read before the module has received an RF packet, the module will
return a value of 0x8000 (which means an RF packet has not yet been received).
© 2010 Digi Internatonal, Inc.
58
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(when ATCF = 1)
(when ATCF = 2)
AT Command: ATCN
Binary Command: 0x09 (9 decimal)
AT Command: ATCT
Binary Command: 0x06 (6 decimal)
Parameter Range:2 - 0xFFFF
Default Parameter Value: 0xC8 (200d)
Number of bytes returned: 2
Related Command: CN (Exit AT Command
Mode)
AT Command: ATDB
Binary Command: 0x36 (54 decimal)
Parameter Range (read-only): 0x6E - 0x28
(-110 to -40 Decimal)
Number of bytes returned: 2
AT Command: ATCS
Binary Command: 0x1F (31 decimal)
Parameter Range: 0 - 4
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: RT (GPI1 Configuration),
TO (GP01 Timeout)
Parameter
0
1
2
3
4
[x 100 milliseconds]
RS-232 CTS flow control
RS-485 TX enable high
RS-485 TX enable low
Configuration
High
Low
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