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RS‐232/485 RF Modem Product Manual – MAN0782‐02
ST (Time before Sleep) Command
TP (Board Temperature) Command
TR (Transmit Error Count) Command
TT (Streaming Limit) Command
TX (Transmit Only) Command
<Sleep Mode (Low Power)> ST Command is used
to set/read the period of time (milliseconds) in
which the modem remains inactive before
entering Sleep Mode.
For example, if the ST Parameter is set to 0x64
(100 decimal), the modem will enter into Sleep
mode after 10 seconds of inactivity (no
transmitting or receiving).
This command can only be used if Cyclic Sleep or
Serial Port Sleep Mode settings have been selected using SM (Sleep Mode) Command.
<Diagnostics> TP Command is used to read the
current temperature of the board.
Sample Output: 26 C
1A
26
<Diagnostics> TR Command is used to report the
number of retransmit failures. This number is
incremented each time a packet is not
acknowledged within the number of retransmits
specified by RR (Retries) Command. It therefore
counts the number of packets that were not
successfully received and were subsequently
dropped.
TR Parameter is not non-volatile and will therefore be reset to zero when the modem is reset.
<Networking & Security> TT Command is used to
set/read the limit on the number of bytes that
can be sent out before a random delay is issued.
If a modem is sending a continuous stream of RF
data, a delay is inserted which stops its
transmission and allows other modems time to
transmit (once it sends TT bytes of data).
Inserted random delay lasts between 1 & 'RN + 1' delay slots, where each delay slot lasts 38 ms.
TT command can be used to simulate full-duplex behavior.
<RF Interfacing> TX Command is used to
set/read the transmit/receive behaviors of the
modem. Setting a modem to TX-only may reduce
latency because the transmitting modem will
never be "stuck" receiving data from other
modems.
[when ATCF = 0]
[when ATCF = 1]
[when ATCF = 2]
AT Command: ATST
Binary Command: 0x02 (2 decimal)
Parameter Range: (ATAT+3) – 0x7FFF
[x 100 milliseconds]
Default Parameter Value: 0x64 (100 decimal)
Number of bytes returned: 2
Related Commands: SM (Sleep Mode), LH
(Wake-up Initializer Timer), HT (Time before
Wake-up Initializer)
AT Command: ATTP
Binary Command: 0x38 (56 decimal)
Parameter Range (read-only): 0– 0x7F
Number of bytes returned: 1
Related Commands: WN (Warning Data)
AT Command: ATTR
Binary Command: 0x1B (27 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0
Number of bytes returned: 2
Related Commands: RR (Retries)
AT Command: ATTT
Binary Command: 0x1A (26 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0 (disabled)
Number of bytes returned: 2
Related Commands: RN (Delay Slots)
AT Command: ATTX
Binary Command: 0x3F (63 decimal)
Parameter Range: 0 – 1
Parameter
Value
0
1
Default Parameter Value: 0
Number of bytes returned: 1
Page 47
Configuration
TX and RX
TX only
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