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參數(shù)資料
| 型號： | XIB-E |
| 廠商： | Digi International/Maxstream |
| 文件頁數(shù)： | 30/64頁 |
| 文件大小： | 1858K |
| 描述： | BOARD INTERFACE ETHERNET |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 附件類型： | 接口板 |
| 適用于相關(guān)產(chǎn)品： | XStream 和 Xcite 收音機(jī) |
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RO (Packetization Timeout) Command
AT Command: ATRO
Binary Command: 0x21 (33 decimal)
Parameter Range: 0 0xFFFF [x 200 祍]
Default Parameter Value: 0
Number of bytes returned: 2
Minimum Firmware Version Required: 4.2A
<Serial Interfacing> Set/Read the time of silence
(no bytes received) after which transmission
begins. After a serial byte is received and if no
other byte is received before the RO timeout, the
transmission will start.
RP (RSSI PWM Timer) Command
<Diagnostics> RP Command is used to enable
PWM (Pulse Width Modulation) output on the
CONFIG pin. The output is calibrated to show the
level the received RF signal is above the
sensitivity level of the module. The PWM pulses
vary from zero to 95 percent. Zero percent
means the received RF signal is at or below the
published sensitivity level of the module. The
following table shows levels above sensitivity and PWM values.
AT Command: ATRP
Binary Command: 0x22 (34 decimal)
Parameter Range: 0 - 0x7F
[x 100 milliseconds]
Default Parameter Value: 0 (disabled)
Number of bytes returned: 1
Minimum Firmware Version Required: 4.2A
The total period of the PWM output is 8.32 ms. Because there are 40 steps in the PWM output;
the minimum step size is 0.208 ms.
Table?03. PWM燙hart?/DIV>
dBm above Sensitivity
PWM percentage
(high period / total period)
10
47.5%
20
62.5%
30
77.5%
A non-zero value defines the time that the PWM output will be active with the RSSI value of the
last received RF packet. After the set time when no RF packets are received, the PWM output will
be set low (0 percent PWM) until another RF packet is received. The PWM output will also be set
low at power-up. A parameter value of 0xFF permanently enables the PWM output and it will
always reflect the value of the last received RF packet.
PWM output shares the Config input pin. When the module is powered, the Config pin will be an
input. During the power-up sequence, the Config pin will be read to determine whether the
module is going into AT Command Mode. After this, if RP parameter is a non-zero value, the
Config pin will be configured as an output and set low until the first RF packet is received. With a
non-zero RP parameter, the Config pin will be an input for RP ms after power up.
RR (Retries) Command
<Networking> Set/Read the number of retries
that can be sent for a given RF packet. Once RR
command is enabled (set to a non-zero value),
RF packet acknowledgements and retries are
enabled. After transmitting a packet, the
transmitter will wait to receive an
acknowledgement from a receiver. If the
acknowledgement is not received in the period of time specified by the RN (Delay Slots)
Command, the transmitter will transmit the original packet again. The packet will be transmitted
repeatedly until an acknowledgement is received or until the packet has been sent RR times.
AT Command: ATRR
Binary Command: 0x18 (24 decimal)
Parameter Range: 0 0xFF
Default Parameter Value: 0 (disabled)
Number of bytes returned: 1
Minimum Firmware Version Required: 4.22
Note: For retries to work correctly, all modules in the system must have retries enabled.
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30?/DIV>
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