Summary

• Page properties (2 modified, 0 added, 0 removed)
• Attachments (0 modified, 0 added, 1 removed)
  • image-20221101000006-1.png

Details

Page properties

Author

...	...	@@ -1,1 +1,1 @@
1		-XWiki.Xiaoling
	1	+XWiki.Edwin

Content

...	...	@@ -10,6 +10,7 @@
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.
11	11
12	12
	13	+
13	13	= 2.  Analyze at the software side =
14	14
15	15	== 2.1  LoRa parameters that effect distance ==
...	...	@@ -66,6 +66,7 @@
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.
67	67
68	68
	70	+
69	69	== 2.3  Check for short distance problem ==
70	70
71	71
...	...	@@ -78,6 +78,7 @@
78	78	[[image:image-20221006185826-3.png]]
79	79
80	80
	83	+
81	81	== 2.4  Best software settings for the longest distance ==
82	82
83	83
...	...	@@ -89,6 +89,7 @@
89	89
90	90
91	91
	95	+
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 ==
...	...	@@ -102,12 +102,13 @@
102	102	[[image:image-20221016081725-1.png||height="426" width="706"]]
103	103
104	104
	109	+
105	105	= 4.  Installation Guidelines =
106	106
107	107	== 4.1  Check the use environment ==
108	108
109	109
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.
	115	+First , User should notice: Radio link quality and performances are highly dependent of the environment.
111	111
112	112	(% style="color:blue" %)**Better performances can be reached with:**
113	113
...	...	@@ -125,6 +125,7 @@
125	125
126	126
127	127
	133	+
128	128	== 4.2  Improve the Antenna ==
129	129
130	130
...	...	@@ -131,6 +131,7 @@
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.
132	132
133	133
	140	+
134	134	= 5.  Some real-world case =
135	135
136	136	== 5.1  Server reason cause end node has problem on Join. ==
...	...	@@ -149,27 +149,4 @@
149	149
150	150	Reference Link:  [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Change%20Gateway%20Power/#H1.A0Overview>>http://wiki.dragino.com/xwiki/bin/view/Main/Change%20Gateway%20Power/#H1.A0Overview]]
151	151
152		-
153		-== 5.2 Chirpstack Default settings to 64 channels which cause Signal Poor. ==
154		-
155		-
156		-In this case, User use a Chirpstack LoRaWAN server with default settings. The Frequency Band is US915 and default settings of Chirpstack has all channels ( All sub-bands , total 72 channels) enable. User use a LDS03A and a LPS8N LoRaWAN gateway for the test.
157		-
158		-
159		-There is a strange issue: LDS03 has a very good RSSI ( RSSI=-40) during OTAA Join. But The LDS03A give a very poor RSSI after OTAA Join. After debug, it proves that the issue is with ChirpStack Frequency band settings. The ChirpStack server enables all 72 channels and the LDS03A will also use all channels after OTAA Join, but the LPS8N only can support 8 channels and set to Sub-Band2. When the LDS03A sends an uplink packet in the channel LPS8N doesn't support, because LDS03A is very close to LPS8N, LPS8N pick up this not support frequency and send to server. So in the platform we see a uplink packet with very poor RSSI.
160		-
161		-
162		-Above issue was confirmed and solved after set the ChirpStack support channels to sub-band2. See below for photos during debug.
163		-
164		-[[image:image-20221031233628-2.png]]
165		-
166		-
167		-[[image:image-20221031233759-3.png]]
168		-
169		-
170		-[[image:image-20221101000006-1.png||height="353" width="931"]]
171		-
172		-
173		-
174		-
175	175

image-20221101000006-1.png

Author

...	...	@@ -1,1 +1,0 @@
1		-XWiki.Edwin

Size

...	...	@@ -1,1 +1,0 @@
1		-88.5 KB

Content