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Author

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1		-XWiki.Xiaoling
	1	+XWiki.Edwin

Content

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	8	+
7	7	= 1.  OverView =
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9	9
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44	44	|(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz
45	45
46	46
47		-
48	48	== 2.2  Adaptive Data Rate (ADR) and set max distance ==
49	49
50	50
51		-**ADR** is the feature that Server will ask End Node to adjust the TXP and DR according to some rules in the server. This is for the purpose of Network Management and Optimize End Node battery life-time.
	52	+(% style="color:#037691" %)**ADR**(%%) is the feature that Server will ask End Node to adjust the TXP and DR according to some rules in the server. This is for the purpose of Network Management and Optimize End Node battery life-time.
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54	54	By default, ADR is turn on((% style="color:#037691" %)**AT+ADR=1**) (%%)so End node ADR feature is enable.
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58	58
59	59	(% style="color:#037691" %)**AT+ADR=0**
60	60
61		-(% style="color:#037691" %)**AT+DR=0**
	62	+(% style="color:#037691" %)**AT+DR=0  **~/~/(%%) Use longest distance modulation
62	62
63		-(% style="color:#037691" %)**AT+TXP=0**
	64	+(% style="color:#037691" %)**AT+TXP=0   **(%%)~/~/Use max power   For EU868, max power can be is AT+TXP=50
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65	65
66	66	This can be downlink via the LoRaWAN downlink command, see [[this link>>url:http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H8.2UseDownlinkCommandtosetafixuplinkDR]] for reference.
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84	84	Below are the settings for longest distance transmission. ( will reduce battery life)
85	85
86	86	* (% style="color:#037691" %)**AT+ADR=0**     (%%)~/~/  Disable ADR
87		-* (% style="color:#037691" %)**AT+DR=  0**     (%%)~/~/  Use the smallest DR
88		-* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power.
	88	+* (% style="color:#037691" %)**AT+DR=  0**     (%%)~/~/  Use the smallest DR,the longest distance modulation
	89	+* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power   For EU868, max power can be is AT+TXP=50
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90	90
91		-
92	92	= 3.  Analyze at the hardware side =
93	93
94	94	== 3.1  Check if the antenna path is good ~-~- For LSn50v2 series end node ==
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124	124	* Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small.
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126	126
127		-
128	128	== 4.2  Improve the Antenna ==
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170	170	[[image:image-20221101000006-1.png||height="353" width="931"]]
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	172	+= 6. Use a repeater =
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	175	+In some cases, user can consider use a repeater for limitation transmition.
	176	+
	177	+See here for how to set up: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20All%20Gateway%20models/LoRaWAN%20IoT%20Kit%20v3%20User%20Manual/#H7.Example6:LimitedLoRaWANrelay >>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20All%20Gateway%20models/LoRaWAN%20IoT%20Kit%20v3%20User%20Manual/#H7.Example6:LimitedLoRaWANrelay]]
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