SENA ProBee-ZU10 - Manual (Page 35)

35 ProBee-ZU10 User Guide Rev.1.5
4.2.2 Multicast Data Mode
Multicast data mode can be used for continuous data transmission to a particular group of multiple
devices. Every ZU10 belongs to a certain group by predetermined group ID when forming or joining the
network.
Multicast data mode can be entered using either ATM or AT+TRANSMITMODE=2. If ATM command is
used, the device will enter the multicast data mode immediately and keep it until escaped using “+++” or
reset by ATZ. If the device is reset, it will not enter the multicast data mode but command mode in this
case.
On the other hand, if AT+TRANSMITMODE=2 is used to enter the multicast data mode, the device enters
the multicast data mode again whenever the device is reset. To disable the multicast data mode, escape
the data mode first by using “+++” string and use AT+TRANSMITMODE=0 and reset the device to apply
the setting permanently.
AT commands used for the multicast data mode are as below.
AT+GROUPID=<value> or AT+GI=<value>, where <value> is 16-bit group ID for multicast data mode.
Set Group ID of the device. The device will receive the multicast data sent to this Group ID.
AT+DESTGROUPID=<value> or AT+DG=<value>, where <value> is 16-bit destination group ID for
multicast data mode.
Set destination Group ID of the device.
ATM<CR>
Set multicast data mode to preconfigured destination group ID without reset.
ATM<value><CR>
Set multicast data mode to <value> group ID and <value> can be 16-bit group ID.
AT+TRANSMITMODE=2<CR> or AT+TM=2<CR>
Set the transmission mode to multicast mode. The device should be reset to apply the mode.
ATS36=n, where n is the radius.
ATS37=n, where n is the number of hops through nonmembers.
Set data relay and forwarding options. Please refer to the 7 S-Registers for more details.
Note: ZigBee compliance rules prevents flooding of the network by limiting the network to a maximum of 9
broadcasts over 8 seconds. Attempts to submit additional broadcasts beyond this should result in the
transmission error. This is approximately one broadcast per second. It is, however, recommended to