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 == ... ... @@ -46,11 +46,10 @@ 46 46 |(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 47 47 48 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.51 +**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 69 + 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 82 + 83 83 == 2.4 Best software settings for the longest distance == 84 84 85 85 ... ... @@ -87,7 +87,7 @@ 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 90 +* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power. 91 91 92 92 93 93 ... ... @@ -104,12 +104,13 @@ 104 104 [[image:image-20221016081725-1.png||height="426" width="706"]] 105 105 106 106 107 + 107 107 = 4. Installation Guidelines = 108 108 109 109 == 4.1 Check the use environment == 110 110 111 111 112 -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.113 +First , User should notice: Radio link quality and performances are highly dependent of the environment. 113 113 114 114 (% style="color:blue" %)**Better performances can be reached with:** 115 115 ... ... @@ -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. 134 134 135 135 137 + 136 136 = 5. Some real-world case = 137 137 138 138 == 5.1 Server reason cause end node has problem on Join. == ... ... @@ -169,14 +169,7 @@ 169 169 [[image:image-20221031233759-3.png]] 170 170 171 171 172 -[[image:image-20221101000006-1.png||height="353" width="931"]] 173 173 174 174 175 -= 6. Use a repeater = 176 176 177 - 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
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