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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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12	12
13		-
14	14	= 2.  Analyze at the software side =
15	15
16	16	== 2.1  LoRa parameters that effect 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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68	68
69		-
70	70	== 2.3  Check for short distance problem ==
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79	79	[[image:image-20221006185826-3.png]]
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81	81
82		-
83	83	== 2.4  Best software settings for the longest distance ==
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90	90	* (% style="color:#037691" %)**AT+TXP=0**    (%%) ~/~/  Use max power.
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92	92
93		-
94	94	= 3.  Analyze at the hardware side =
95	95
96	96	== 3.1  Check if the antenna path is good ~-~- For LSn50v2 series end node ==
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104	104	[[image:image-20221016081725-1.png||height="426" width="706"]]
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106	106
107		-
108	108	= 4.  Installation Guidelines =
109	109
110	110	== 4.1  Check the use environment ==
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112	112
113		-First , User should notice: Radio link quality and performances are highly dependent of the environment.
	108	+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.
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115	115	(% style="color:blue" %)**Better performances can be reached with:**
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127	127	* 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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129	129
130		-
131	131	== 4.2  Improve the Antenna ==
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134	134	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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136	136
137		-
138	138	= 5.  Some real-world case =
139	139
140	140	== 5.1  Server reason cause end node has problem on Join. ==
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171	171	[[image:image-20221031233759-3.png]]
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	167	+[[image:image-20221101000006-1.png||height="353" width="931"]]
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	170	+= 6. Use a repeater =
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	172	+In some cases, user can consider use a repeater for limitation transmition.
	173	+
	174	+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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