Digi XBee 3 Cellular LTE-M, Руководство пользователя, Страница: 196 / 331

AT commands Network commands
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide 196
Bit 2 - USB direct enable
Set bit 2 to enable USB direct mode. After setting, use WR (Write) to write all values to flash and use
FR (Force Reset) to reset the device.
Note Setting P0 (DIO10/PWM0 Configuration) to 6 overrides setting DO bit 2.
Bit 3 - PSM
To enable PSM, set DO (Device Options) bit 3. See Power Saving Mode (PSM) .
Bit 4 - Low Voltage Shutdown
Set bit 4 to enable the Low Voltage Shutdown feature. See Low voltage shutdown .
Bit 5 - Enable eDRX
Set bit 5 to request the eDRX feature from the network. The requested cycle length is defined by the
DX command , and the network-provided cycle length can be read using D? command , once the device
is registered on the network. When connected to the network, the AI command is set to 0.
Range
0-5
Bitfield
Bit Description
0 Enable Remote Manager
2 Enable USB Direct
3 Enable PSM
4
Enable the Low Voltage Shutdown feature
5 Enable eDRX
Note We strongly recommend that you clear bit 0 (Enable Remote Manager) if you set bit 3. If not, the
connection that the device retains with Remote Manager causes the cellular component to spend very
little time in low power, negating the value of selecting that feature.
Default
1 (Bit 0 enabled)
DX (Requested eDRX cycle length)
The eDRX cycle length (in milliseconds) that will be requested from the network if DO command bit 5 is
set. For best power characteristics, you should set this to the maximum receive latency your
application is designed to tolerate.
The actual value obtained is provided by the network and is generally less than the value requested.
The specific legal values depend on network access technology and carrier policy. The maximum value,
where data is retained by the network without loss, also depends on carrier policy and this value
should be selected in light of guidance provided by your carrier.