Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -1,1 +1,1 @@ 1 -XWiki. ting1 +XWiki.Edwin - Content
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... ... @@ -37,14 +37,15 @@ 37 37 38 38 **End node actually value when TXP=0 and DR=0** 39 39 40 -(% border="1.5" cellspacing="4" style="background-color:#f 2f2f2; width:1002px" %)41 -|(% style=" background-color:#d9e2f3;width:134px" %)**Frequency band**|(% style="background-color:#d9e2f3;width:400px" %)**Output Power in LoRa Module (consider 2dB antenna)**|(% style="background-color:#d9e2f3;width:362px" %)(((40 +(% border="1.5" cellspacing="4" style="background-color:#ffffcc; color:black; width:1002px" %) 41 +|(% style="width:134px" %)**Frequency band**|(% style="width:400px" %)**Output Power in LoRa Module (consider 2dB antenna)**|(% style="width:362px" %)((( 42 42 **Spreading Factor(Higher SF can transmit further)** 43 -)))|(% style=" background-color:#d9e2f3;width:102px" %)**Band Width**43 +)))|(% style="width:102px" %)**Band Width** 44 44 |(% style="width:134px" %)**EU868**|(% style="width:400px" %)14dBm|(% style="width:362px" %)SF=12|(% style="width:102px" %)125Khz 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 + 48 48 == 2.2 Adaptive Data Rate (ADR) and set max distance == 49 49 50 50 ... ... @@ -58,9 +58,9 @@ 58 58 59 59 (% style="color:#037691" %)**AT+ADR=0** 60 60 61 -(% style="color:#037691" %)**AT+DR=0 62 +(% style="color:#037691" %)**AT+DR=0 **~/~/(%%) Use longest distance modulation 62 62 63 -(% style="color:#037691" %)**AT+TXP=0 **(%%)~/~/ 64 +(% 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. ... ... @@ -83,21 +83,14 @@ 83 83 84 84 Below are the settings for longest distance transmission. ( will reduce battery life) 85 85 86 -* (% style="color:#037691" %)**AT+ADR=0** (% style="color:#037691" %)**(downlinkpayload: 2200FFFF)**87 -* (% style="color:#037691" %)**AT+DR=0** (% style="color:#037691" %)**(downlinkpayload: 220000FF)**88 -* (% style="color:#037691" %)**AT+TXP=0** (% style="color:#037691" %)** (downlinkpayload: 22000000)**87 +* (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR 88 +* (% style="color:#037691" %)**AT+DR= 0** (%%)~/~/ Use the smallest DR,the longest distance modulation 89 +* (% style="color:#037691" %)**AT+TXP=0** (%%) ~/~/ Use max power For EU868, max power can be is AT+TXP=50 89 89 90 -== 2.5 Debug in Software == 91 91 92 -Dragino can help client to debug the software for the distance issue. In the case , please send us below info: 93 - 94 -* Detail packets include for Join Request, Join Accept, Uplink & Downlink, These packets should include: 95 -** RSSI, DataRate, FCNT, Frequency. 96 -** MIC command detail & Payload detail. 97 - 98 98 = 3. Analyze at the hardware side = 99 99 100 -== 3.1 Check if the antenna path is good ~-~- For LS N50v2 series end node ==94 +== 3.1 Check if the antenna path is good ~-~- For LSn50v2 series end node == 101 101 102 102 103 103 a) Open Enclosure and Check if the antenna connection to module is good. ... ... @@ -129,6 +129,7 @@ 129 129 * High ISM band usage by other technologies. 130 130 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 131 131 126 + 132 132 == 4.2 Improve the Antenna == 133 133 134 134