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649	649	[[image:image-20240923105725-1.png]]
650	650
651	651
652		-This example assumes that the user already has the prerequisites:
	652	+This example assumes users already have:
653	653
654		-* (% style="color:blue" %)**SN50v3-LB Software Location:   **(%%)**[[SN50v3-LB_protocol_008(AU915).bin>>attach:https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/SN50v3-LB/#H3.ConfigureSN50v3-LB2FLS||target="_blank"]] .**Users need to flash them with the firmware support Multicast.
655		-* (% style="color:blue" %)**SN50v3-LB Configure:   **(%%)Enable CLASS C and DISFCNTCHECK(The downlink fcnt is not compared with the fcnt of the node).
	654	+* SN50v3-LB register on ChirpStack server already
	655	+* The user is able to see the data on the ChirpStack server device page.
656	656
657	657	(% class="wikigeneratedid" %)
658		- **AT command:** (% style="color:blue" %)**AT+CLASS=C**
	658	+(% style="color:red" %)**Note: **(%%)SN50v3-LB must enable CLASS C and DISFCNTCHECK(The downlink fcnt is not compared with the fcnt of the node).
659	659
660	660	(% class="wikigeneratedid" %)
661		- (% style="color:blue" %)**AT+DISFCNTCHECK=1**
	661	+AT command: **AT+CLASS=C**
662	662
663	663	(% class="wikigeneratedid" %)
664		-For details on how to configure the SN50v3-LB, please refer to the link:** [[Configure SN50v3-LB>>https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/SN50v3-LB/#H3.ConfigureSN50v3-LB2FLS]]**
	664	+ **AT+DISFCNTCHECK=1**
665	665
666		-* (% style="color:blue" %)**Chirpstack Configuration: **(%%)LPS8v2 gateway and SN50v3-LB register on ChirpStack server already
667	667
668		-Register LPS8v2 gateway to Chirpstack. See section :[[https:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Notes%20for%20ChirpStack/#H4.A0SemtechUDPforChirpStackv4>>https://wiki.dragino.com/xwiki/bin/view/Main/Notes%20for%20ChirpStack/#H4.A0SemtechUDPforChirpStackv4]]
669		-
670		-Register SN50v3-LB to Chirpstack. See section :[[https:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Notes%20for%20ChirpStack/#H2.A0Nodeusageintroduction>>https://wiki.dragino.com/xwiki/bin/view/Main/Notes%20for%20ChirpStack/#H2.A0Nodeusageintroduction]]
671		-
672		-
673	673	=== Step 1. Create the multicast group ===
674	674
675	675