Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -90,21 +90,17 @@ 90 90 * (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power. 91 91 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 == 97 97 98 - 99 99 a) Open Enclosure and Check if the antenna connection to module is good. 100 100 101 101 b) check if the connector match. 102 102 103 - 104 104 [[image:image-20221016081725-1.png||height="426" width="706"]] 105 105 106 106 107 - 108 108 = 4. Installation Guidelines = 109 109 110 110 == 4.1 Check the use environment == ... ... @@ -119,6 +119,7 @@ 119 119 * No high level radio interferes in the ISM band you use. 120 120 * At least 1 meter above the ground. 121 121 118 + 122 122 (% style="color:blue" %)**Radio performances are degraded with:** 123 123 124 124 * Obstacles: buildings, trees... ... ... @@ -127,7 +127,6 @@ 127 127 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 128 128 129 129 130 - 131 131 == 4.2 Improve the Antenna == 132 132 133 133 ... ... @@ -153,25 +153,4 @@ 153 153 154 154 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]] 155 155 156 - 157 -== 5.2 Chirpstack Default settings to 64 channels which cause Signal Poor. == 158 - 159 - 160 -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. 161 - 162 - 163 -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. 164 - 165 - 166 -Above issue was confirmed and solved after set the ChirpStack support channels to sub-band2. See below for photos during debug. 167 - 168 -[[image:image-20221031233628-2.png]] 169 - 170 - 171 -[[image:image-20221031233759-3.png]] 172 - 173 - 174 - 175 - 176 - 177 177
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