Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -4,6 +4,8 @@ 4 4 5 5 6 6 7 + 8 + 7 7 = 1. OverView = 8 8 9 9 ... ... @@ -35,20 +35,18 @@ 35 35 36 36 **End node actually value when TXP=0 and DR=0** 37 37 38 -(% border="1.5" cellspacing="4" style="background-color:# ffffcc;color:black;width:1002px" %)39 -|(% style="width:134px" %)**Frequency band**|(% style="width:400px" %)**Output Power in LoRa Module (consider 2dB antenna)**|(% style="width:362px" %)((( 40 +(% border="1.5" cellspacing="4" style="background-color:#F2F2F2; width:1002px" %) 41 +|(% style="width:134px;background-color:#D9E2F3" %)**Frequency band**|(% style="width:400px;background-color:#D9E2F3" %)**Output Power in LoRa Module (consider 2dB antenna)**|(% style="width:362px;background-color:#D9E2F3" %)((( 40 40 **Spreading Factor(Higher SF can transmit further)** 41 -)))|(% style="width:102px" %)**Band Width** 43 +)))|(% style="width:102px;background-color:#D9E2F3" %)**Band Width** 42 42 |(% style="width:134px" %)**EU868**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 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 - 48 48 == 2.2 Adaptive Data Rate (ADR) and set max distance == 49 49 50 50 51 -**ADR** 51 +(% 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. 52 52 53 53 54 54 By default, ADR is turn on((% style="color:#037691" %)**AT+ADR=1**) (%%)so End node ADR feature is enable. ... ... @@ -58,9 +58,9 @@ 58 58 59 59 (% style="color:#037691" %)**AT+ADR=0** 60 60 61 -(% style="color:#037691" %)**AT+DR=0** 61 +(% style="color:#037691" %)**AT+DR=0 **~/~/(%%) Use longest distance modulation 62 62 63 -(% style="color:#037691" %)**AT+TXP=0** 63 +(% style="color:#037691" %)**AT+TXP=0 **(%%)~/~/Use max power For EU868, max power can be is AT+TXP=50 64 64 65 65 66 66 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. ... ... @@ -84,11 +84,9 @@ 84 84 Below are the settings for longest distance transmission. ( will reduce battery life) 85 85 86 86 * (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR 87 -* (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR 88 -* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power .87 +* (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR,the longest distance modulation 88 +* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power For EU868, max power can be is AT+TXP=50 89 89 90 - 91 - 92 92 = 3. Analyze at the hardware side = 93 93 94 94 == 3.1 Check if the antenna path is good ~-~- For LSn50v2 series end node == ... ... @@ -123,8 +123,6 @@ 123 123 * High ISM band usage by other technologies. 124 124 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 125 125 126 - 127 - 128 128 == 4.2 Improve the Antenna == 129 129 130 130 ... ... @@ -170,6 +170,11 @@ 170 170 [[image:image-20221101000006-1.png||height="353" width="931"]] 171 171 172 172 169 += 6. Use a repeater = 173 173 174 174 172 +In some cases, user can consider use a repeater for limitation transmition. 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 + 175 175