Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -4,8 +4,6 @@ 4 4 5 5 6 6 7 - 8 - 9 9 = 1. OverView = 10 10 11 11 ... ... @@ -12,6 +12,7 @@ 12 12 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. 13 13 14 14 13 + 15 15 = 2. Analyze at the software side = 16 16 17 17 == 2.1 LoRa parameters that effect distance == ... ... @@ -45,12 +45,10 @@ 45 45 |(% 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 46 46 |(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 47 47 48 - 49 - 50 50 == 2.2 Adaptive Data Rate (ADR) and set max distance == 51 51 52 52 53 - (% style="color:#037691" %)**ADR**(%%)is the feature that Server will ask End Node to adjust the TXP and DR according to some rules in the server. This is for the purpose of Network Management and Optimize End Node battery life-time.50 +**ADR** is the feature that Server will ask End Node to adjust the TXP and DR according to some rules in the server. This is for the purpose of Network Management and Optimize End Node battery life-time. 54 54 55 55 56 56 By default, ADR is turn on((% style="color:#037691" %)**AT+ADR=1**) (%%)so End node ADR feature is enable. ... ... @@ -68,6 +68,7 @@ 68 68 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. 69 69 70 70 68 + 71 71 == 2.3 Check for short distance problem == 72 72 73 73 ... ... @@ -80,6 +80,7 @@ 80 80 [[image:image-20221006185826-3.png]] 81 81 82 82 81 + 83 83 == 2.4 Best software settings for the longest distance == 84 84 85 85 ... ... @@ -87,10 +87,8 @@ 87 87 88 88 * (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR 89 89 * (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR 90 -* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power 89 +* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power. 91 91 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 == ... ... @@ -104,6 +104,7 @@ 104 104 [[image:image-20221016081725-1.png||height="426" width="706"]] 105 105 106 106 104 + 107 107 = 4. Installation Guidelines = 108 108 109 109 == 4.1 Check the use environment == ... ... @@ -125,8 +125,6 @@ 125 125 * High ISM band usage by other technologies. 126 126 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 127 127 128 - 129 - 130 130 == 4.2 Improve the Antenna == 131 131 132 132 ... ... @@ -133,6 +133,7 @@ 133 133 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. 134 134 135 135 132 + 136 136 = 5. Some real-world case = 137 137 138 138 == 5.1 Server reason cause end node has problem on Join. == ... ... @@ -172,11 +172,6 @@ 172 172 [[image:image-20221101000006-1.png||height="353" width="931"]] 173 173 174 174 175 -= 6. Use a repeater = 176 176 177 177 178 -In some cases, user can consider use a repeater for limitation transmition. 179 - 180 -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]] 181 - 182 182