Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -44,6 +44,7 @@ 44 44 |(% style="width:134px" %)**US915**|(% style="width:400px" %)20 or 22 dBm (depends on max output of module)|(% style="width:362px" %)SF=10|(% style="width:102px" %)125Khz 45 45 |(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 46 46 47 + 47 47 == 2.2 Adaptive Data Rate (ADR) and set max distance == 48 48 49 49 ... ... @@ -93,16 +93,13 @@ 93 93 94 94 == 3.1 Check if the antenna path is good ~-~- For LSn50v2 series end node == 95 95 96 - 97 97 a) Open Enclosure and Check if the antenna connection to module is good. 98 98 99 99 b) check if the connector match. 100 100 101 - 102 102 [[image:image-20221016081725-1.png||height="426" width="706"]] 103 103 104 104 105 - 106 106 = 4. Installation Guidelines = 107 107 108 108 == 4.1 Check the use environment == ... ... @@ -117,6 +117,7 @@ 117 117 * No high level radio interferes in the ISM band you use. 118 118 * At least 1 meter above the ground. 119 119 118 + 120 120 (% style="color:blue" %)**Radio performances are degraded with:** 121 121 122 122 * Obstacles: buildings, trees... ... ... @@ -150,27 +150,4 @@ 150 150 151 151 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]] 152 152 153 - 154 -== 5.2 Chirpstack Default settings to 64 channels which cause Signal Poor. == 155 - 156 - 157 -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. 158 - 159 - 160 -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. 161 - 162 - 163 -Above issue was confirmed and solved after set the ChirpStack support channels to sub-band2. See below for photos during debug. 164 - 165 -[[image:image-20221031233628-2.png]] 166 - 167 - 168 -[[image:image-20221031233759-3.png]] 169 - 170 - 171 -[[image:image-20221101000006-1.png||height="353" width="931"]] 172 - 173 - 174 - 175 - 176 - 152 +
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