Changes for page How to improve LoRaWAN distance
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... ... @@ -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 == ... ... @@ -43,7 +43,6 @@ 43 43 |(% 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 44 44 |(% style="width:134px" %)**AS923**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 45 45 46 - 47 47 == 2.2 Adaptive Data Rate (ADR) and set max distance == 48 48 49 49 ... ... @@ -65,6 +65,7 @@ 65 65 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. 66 66 67 67 68 + 68 68 == 2.3 Check for short distance problem == 69 69 70 70 ... ... @@ -77,6 +77,7 @@ 77 77 [[image:image-20221006185826-3.png]] 78 78 79 79 81 + 80 80 == 2.4 Best software settings for the longest distance == 81 81 82 82 ... ... @@ -86,7 +86,6 @@ 86 86 * (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR 87 87 * (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power. 88 88 89 - 90 90 = 3. Analyze at the hardware side = 91 91 92 92 == 3.1 Check if the antenna path is good ~-~- For LSn50v2 series end node == ... ... @@ -100,6 +100,7 @@ 100 100 [[image:image-20221016081725-1.png||height="426" width="706"]] 101 101 102 102 104 + 103 103 = 4. Installation Guidelines = 104 104 105 105 == 4.1 Check the use environment == ... ... @@ -121,7 +121,6 @@ 121 121 * High ISM band usage by other technologies. 122 122 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 123 123 124 - 125 125 == 4.2 Improve the Antenna == 126 126 127 127 ... ... @@ -128,6 +128,7 @@ 128 128 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. 129 129 130 130 132 + 131 131 = 5. Some real-world case = 132 132 133 133 == 5.1 Server reason cause end node has problem on Join. == ... ... @@ -167,10 +167,6 @@ 167 167 [[image:image-20221101000006-1.png||height="353" width="931"]] 168 168 169 169 170 -= 6. Use a repeater = 171 171 172 -In some cases, user can consider use a repeater for limitation transmition. 173 173 174 -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]] 175 - 176 176