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9XTend ‐ PKG ‐ E? ? Ethernet ? RF ? Modem ? – ? Product ? Manual ? v2.x4x ? [2007.01.04]
HP (Hopping Channel) Command
<Networking & Security> The HP command is
used to set/read the RF modem's hopping channel
number. A channel is one of three layers of filtra-
tion available to the modem.
In order for modems to communicate with each
other, the modems must have the same channel
number since each channel uses a different hop-
ping sequence. Different channels can be used to
prevent modems in one network from listening to
transmissions of another.
HT (Time before Wake-up Initializer) Command
<Sleep (Low Power)> The HT command is used
to set/read the time of inactivity (no serial or RF
data is sent or received) before a wake-up initial-
izer is sent by a TX (transmitting) RF modem. The
HT parameter should be set shorter than inactiv-
ity timeout [ST Command] time of any RX
(receiving) modems operating in Cyclic Sleep
(SM=4-8). The wake-up initializer sent by the TX
modem instructs all RX modems to remain awake
to receive RF data.
From the RX modem perspective: After HT time
AT Command: ATHP
Binary Command: 0x11 (17 decimal)
Parameter Range: 0 - 9
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: ID (Modem VID), DT
(Destination Address), MK (Address Mask)
AT Command: ATHT
Binary Command: 0x03 (3 decimal)
Parameter Range: 0 - 0xFFFF
[x 100 milliseconds]
Default Parameter Value: 0xFFFF (wake-up
initializer will not be sent)
Number of bytes returned: 2
Related Commands: LH (Wake-up Initializer
Timer), SM (Sleep Mode), ST (Time before
Sleep)
elapses and the inactivity timeout [ST Command]
is met, the RX modem goes into cyclic sleep. In cyclic sleep, the RX modem wakes once per sleep
interval [SM Command] to check for a wake-up initializer. When a wake-up initializer is detected,
the modem stays awake to receive data. The wake-up initializer must be longer than the cyclic
sleep interval to ensure that sleeping modems detect incoming data.
When HT time elapses, the TX modem knows it needs to send a wake-up Initializer for all RX
modems to remain awake and receive the next transmission.
HV (Hardware Version) Command
<Diagnostics> The HV command is used to read
the hardware version of the RF modem.
AT Command: ATHV
Parameter Range: 0 - 0xFFFF [Read-only]
Minimum Firmware Version Required: v1.x80
ID (Modem VID) Command
<Networking & Security> The ID command is
used to set/read the VID (Vendor Identification
Number) of the RF modem. RF modems must
have matching VIDs in order to communicate.
AT Command: ATID
Binary Command: 0x27 (39 decimal)
Parameter Range:
0x11 - 0x7FFF (user-settable)
0 - 0x10 & 0x8000 - 0xFFFF (factory-set)
Default Parameter Value: 0x3332 (13106d)
Number of bytes returned: 2
? ? 2007 ? MaxStream, ? Inc., ? Confidential ? & ? Proprietary ?‐? All ? Rights ? Reserved ?
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