<
From version < 214.1 >
edited by Kilight Cao
on 2024/07/17 09:24
To version < 222.1 >
edited by Kilight Cao
on 2024/09/23 10:57
>
Change comment: Uploaded new attachment "image-20240923105725-1.png", version {1}

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45 45  
46 46  **Step 1: Add application**
47 47  
48 -[[image:image-20230702094608-1.png||height="537" width="1015"]]
48 +[[image:image-20240831154333-1.png||height="553" width="1074"]]
49 49  
50 50  
51 51  **Step 2:Fill name**
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629 629  [[image:image-20220531174046-19.png]]
630 630  
631 631  
632 +(% class="wikigeneratedid" %)
633 += 9.  Chirpstack Multicast Configuration =
634 +
635 +
636 +== 9.1  Introduction ==
637 +
638 +ChirpStack has support for creating multicast-groups to which devices can be assigned. When enqueueing a downlink payload for a multicast-group, ChirpStack will analyze which gateways must be used for broadcasting to cover the complete multicast-group. This means that potentially, a single multicast downlink payload will be emitted multiple times.
639 +
640 +Multicast can be used for the following device-classes:
641 +
642 +* Class-B
643 +* Class-C
644 +
645 +
646 +== 9.2 Example to configure chirpstack Multicast ==
647 +
648 +
649 +This section illustrates how to configure chirpstack Multicast. Below is the network structure, we use our LPS8v2 as the LoRaWAN gateway and SN50v3-LB as the LoRaWAN end-node here.
650 +
651 +
652 +
632 632  = 9.  Multiply Uplink in ChirpStack =
633 633  
634 634  
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992 992  **Note: lorawan's protocol link——[[LoRaWAN® Regional Parameters v1.0.3revA (lora-alliance.org)>>url:https://resources.lora-alliance.org/document/lorawan-regional-parameters-v1-0-3reva]]**
993 993  
994 994  
1016 +== 13.3  ChirpStackv4 node device displays "UPLINK_F_CNT_RETRANSMISSION" ==
995 995  
996 996  
997 -== 13.3 How to get the log information of the node ==
1019 +This is because the node's packets are retransmitted, and the Fcnt of these packets is the same.
998 998  
1021 +The user can Disable frame-counter validation on the chirpstack node and this warning message will not appear in the logs.
999 999  
1023 +
1024 +The packet is retransmitted because the node device has enabled the acknowledgment uplink packet mode and the node cannot receive the ACK acknowledgment packet delivered by the gateway.
1025 +
1026 +
1027 +**The possible reasons are: **
1028 +
1029 +~1. The signal of the node device and the gateway is not good
1030 +
1031 +2. Too many node devices affect the downlink of the gateway
1032 +
1033 +
1034 +[[image:image-20240717085339-1.jpeg]]
1035 +
1036 +
1037 +* **Disable frame-counter validation**
1038 +
1039 +[[image:image-20240717102613-5.png||height="803" width="1211"]]
1040 +
1041 +
1042 +* **Result**
1043 +
1044 +[[image:image-20240717092428-4.jpeg]]
1045 +
1046 +
1047 +== 13.4  How to get the log information of the node? ==
1048 +
1049 +
1000 1000  ~1. Get information about a single node.
1001 1001  
1002 1002  * Download this file in the node's live data interface.
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1028 1028  
1029 1029  [[image:image-20240117175738-5.png]]
1030 1030  
1031 -== ==
1081 +(% class="wikigeneratedid" id="H" %)
1082 +
1032 1032  )))
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