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 ... ... @@ -35,19 +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 47 == 2.2 Adaptive Data Rate (ADR) and set max distance == 48 48 49 49 50 -**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. 51 51 52 52 53 53 By default, ADR is turn on((% style="color:#037691" %)**AT+ADR=1**) (%%)so End node ADR feature is enable. ... ... @@ -57,9 +57,9 @@ 57 57 58 58 (% style="color:#037691" %)**AT+ADR=0** 59 59 60 -(% style="color:#037691" %)**AT+DR=0** 61 +(% style="color:#037691" %)**AT+DR=0 **~/~/(%%) Use longest distance modulation 61 61 62 -(% 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 63 63 64 64 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. ... ... @@ -83,10 +83,9 @@ 83 83 Below are the settings for longest distance transmission. ( will reduce battery life) 84 84 85 85 * (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR 86 -* (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR 87 -* (% 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 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 == ... ... @@ -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 ... ... @@ -169,6 +169,7 @@ 169 169 170 170 = 6. Use a repeater = 171 171 171 + 172 172 In some cases, user can consider use a repeater for limitation transmition. 173 173 174 174 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]]