Changes for page How to improve LoRaWAN distance
Last modified by Xiaoling on 2024/08/16 11:25
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... ... @@ -37,16 +37,14 @@ 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:#fff fcc;color:black;width:1002px" %)41 -|(% 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="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" %)((( 42 42 **Spreading Factor(Higher SF can transmit further)** 43 -)))|(% style="width:102px" %)**Band Width** 43 +)))|(% style="background-color:#d9e2f3; 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 - 49 - 50 50 == 2.2 Adaptive Data Rate (ADR) and set max distance == 51 51 52 52 ... ... @@ -60,9 +60,9 @@ 60 60 61 61 (% style="color:#037691" %)**AT+ADR=0** 62 62 63 -(% style="color:#037691" %)**AT+DR=0** 61 +(% style="color:#037691" %)**AT+DR=0 **~/~/(%%) Use longest distance modulation 64 64 65 -(% 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 66 66 67 67 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. ... ... @@ -85,15 +85,21 @@ 85 85 86 86 Below are the settings for longest distance transmission. ( will reduce battery life) 87 87 88 -* (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR 89 -* (% style="color:#037691" %)**AT+DR= 90 -* (% style="color:#037691" %)**AT+TXP=0** (%%) 86 +* (% style="color:#037691" %)**AT+ADR=0** (%%)~/~/ Disable ADR (% style="color:#037691" %)**(downlinkpayload: 2200FFFF)** 87 +* (% style="color:#037691" %)**AT+DR=0** (%%)~/~/ Use the smallest DR,the longest distance modulation (% style="color:#037691" %)**(downlinkpayload: 220000FF)** 88 +* (% style="color:#037691" %)**AT+TXP=0** (%%)~/~/ Use max power For EU868, max power can be is AT+TXP=50 (% style="color:#037691" %)** (downlinkpayload: 22000000)** 91 91 90 +== 2.5 Debug in Software == 92 92 92 +Dragino can help client to debug the software for the distance issue. In the case , please send us below info: 93 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 + 94 94 = 3. Analyze at the hardware side = 95 95 96 -== 3.1 Check if the antenna path is good ~-~- For LS n50v2 series end node ==100 +== 3.1 Check if the antenna path is good ~-~- For LSN50v2 series end node == 97 97 98 98 99 99 a) Open Enclosure and Check if the antenna connection to module is good. ... ... @@ -125,8 +125,6 @@ 125 125 * High ISM band usage by other technologies. 126 126 * Radio communication are usually killed with bad topographic conditions. It is usually not possible to communicate through a hill, even very small. 127 127 128 - 129 - 130 130 == 4.2 Improve the Antenna == 131 131 132 132