Digi XBee, Руководство пользователя, Страница: 229 / 307

AT commands Network commands
XBee/XBee-PRO® S2C ZigBee® RF Module 229
Example
The following table shows the results for a thirteen channel scan.
SD setting Time
0 0.200 s
2 0.799 s
4 3.190 s
6 12.780 s
Note SD influences the time the MAC listens for beacons or runs an energy scan on a given channel.
The SD time is not a accurate estimate of the router/end device joining time requirements. ZigBee
joining adds additional overhead including beacon processing on each channel, and sending a join
request that extend the actual joining time.
Parameter range
0 - 7 (exponent)
0 - 0x0E
Default
3
Start an Energy Detect scan. This command accepts an argument to specify the time in milliseconds
to scan IEEE 802.15.4 channels 11 through 26. The device loops through all 16 channels until the time
elapses and returns the maximal energy on each channel. In Transparent mode, a comma must follow
each value with the list ending with a carriage return. The values returned reflect the detected energy
level in units of -dBm. Convert an
ED response of 49, 3A, and so on, to decimal to become -73 dBm, -58
dBm, and so on.
Parameter range
1 - 0xFF (x1 ms)
Default
0x10 (16 ms)
ZS (ZigBee Stack Profile)
Set or read the ZigBee stack profile value. This must be the same on all devices that will join the same
network. Effective with release 4x5E, changing
ZS to a different value causes all current parameters
to be written to persistent storage. While the stack profile is changing, CTS is de-asserted to prevent
serial input. We recommend CTS flow control.
Parameter range
0 - 2
Default
0