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1		-XWiki.Xiaoling
	1	+XWiki.Edwin

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10	10	In real-world deployment for LoRa, distance is a common topic. We always want to have the longest distance. This chapter shows some instructions for how to improve this.
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13	13	= 2.  Analyze at the software side =
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15	15	== 2.1  LoRa parameters that effect distance ==
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44	44	|(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz
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47		-
48	48	== 2.2  Adaptive Data Rate (ADR) and set max distance ==
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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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69	69	== 2.3  Check for short distance problem ==
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78	78	[[image:image-20221006185826-3.png]]
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	82	+
81	81	== 2.4  Best software settings for the longest distance ==
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102	102	[[image:image-20221016081725-1.png||height="426" width="706"]]
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105	105	= 4.  Installation Guidelines =
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107	107	== 4.1  Check the use environment ==
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110		-First , User should notice: Radio link quality and performances are highly dependent of the environment.Even you have the same hardware and antenna, Different installation will result in different performance.
	113	+First , User should notice: Radio link quality and performances are highly dependent of the environment.
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112	112	(% style="color:blue" %)**Better performances can be reached with:**
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131	131	In some case, we have to install the device inside the chamber or next to a metal case. So the signal between the antenna and the receiver (gateway) is blocked by the metal. This will greatly reduce the signal. In such case, we can consider using antenna extend cable to extend the antenna to a better position.
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	137	+
134	134	= 5.  Some real-world case =
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136	136	== 5.1  Server reason cause end node has problem on Join. ==
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167	167	[[image:image-20221031233759-3.png]]
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170		-[[image:image-20221101000006-1.png||height="353" width="931"]]
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1		-XWiki.Edwin

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