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1		-XWiki.Xiaoling
	1	+XWiki.Bei

Content

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215	215	* This packet must match the DataRate of RX1(RX1DR) or RX2 (RX2DR). (% style="color:red" %)**This is the common fail point, because different lorawan server might use different RX2DR and they don't info End Node via ADR message so cause the mismatch. If this happen, user need to change the RX2DR to the right value in end node. In OTAA, LoRaWAN Server will send the RX2DR setting in Join Accept message so the end node will auto adjust. but ABP uplink doesn't support this auto change.**
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217	217
218		-
219	219	== 5.2 See Debug Info ==
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332	332	* End Node traffic (from server UI) to shows end node activity in server.
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334	334
335		-
336	336	= 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
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462	462	When using the frequency mentioned above, the server sometimes adjusts the Data Rate (DR) of the node, because the end node has Adaptive Data Rate (ADR) Enabled.
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	462	+1.
	463	+
464	464	When the server adjusts end node data rate to 0, the maximum payload length is 11 bytes. The server sometimes sends an ADR packet to the end node, and the node will reply to the server after receiving the ADR packet, but the number of payload bytes exceeds the limit, so it will send a normal uplink packet, and following an additional 00 data packet to handle this MAC command response.
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	466	+2.
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	468	+The server downlinks a calibration time package
	469	+This calibration time packet will exceed the byte limit, causing its payload to become 00
	470	+
467	467	(% style="color:blue" %)**How to solve:**
468	468
469		-Solution: Use the decoder to filter out this 0x00 packet.
	473	+Solution:
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	475	+~1. Use the decoder to filter out this 0x00 packet.
	476	+
	477	+2. Data rate changed from DR3 to DR5, increasing upload byte length
	478	+AT+ADR=0
	479	+AT+DR=3
	480	+
	481	+Downlink：
	482	+
	483	+[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate]]
	484	+
471	471	Some node decoders may not have the filter function, or you need decoders of other servers and formats. Please send an email to [[support@dragino.com>>mailto:support@dragino.com]]
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