Changes for page LoRaWAN Communication Debug

Last modified by Edwin Chen on 2025/01/29 20:30

From version < 32.7 >

edited by Xiaoling
on 2022/07/13 15:10

To version < 29.4 >

edited by Xiaoling
on 2022/05/26 17:12

Change comment: There is no comment for this version

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@@ -1,12 +1,14 @@
--**~     Table of Contents:**
++**~     Contents:**
++(((
++
++)))
++
  {{toc/}}
--
  = 1. OTAA Join Process Debug =
--
  These pages are useful to check what is wrong on the Join process. Below shows the four steps that we can check the Join Process.
  \\**If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the sceenshots for each step to check. They include:**
@@ -62,7 +62,6 @@
  = 2. Notice of US915/CN470/AU915 Frequency band =
--
  (((
  If user has problem to work with lorawan server in band US915/AU915/CN470, he can check:
  )))
@@ -105,13 +105,10 @@
  AU915 Channels
--
  [[image:image-20220526163941-8.png]]
  (((
  CN470 Channels
--
--
  )))
  (((
@@ -122,8 +122,6 @@
  (((
  TTN FREQUENCY PLAN
--
--
  )))
  (((
@@ -133,7 +133,6 @@
  = 3. Why i see data lost/unperiocially uplink data? Even the signal strength is good =
--
  In this case, we can check if the frequency band matches in End Node, Gateway and LoRaWAN server. A typical case is using US915 in ChirpStack server as below:
  * **End node** ~-~-> Use Sub-band2 (Channel 8,9,10,11,12,13,14,15) for Dragino Sensor. ADR is also enable, this is the default settings for dragino sensors.
@@ -155,7 +155,6 @@
  = 4. Transmision on ABP Mode =
--
  (((
  In ABP mode, there is a Frame Counter Checks. With this check enabled, the server will only accept the frame with a higher counter. If you reboot the device in ABP mode, the device will start from count 0, so you won't be able to see the frame update in server.
  )))
@@ -185,7 +185,6 @@
  == 5.1 How it work ==
--
  LoRaWAN End node will open two receive windows to receive the downstream data. If the downstream packets arrive the end node at these receive windows, the end node will be able to get this packet and process it.
  (((
@@ -192,11 +192,10 @@
  Depends on Class A or Class C, the receive windows will be a little difference,
  )))
--[[image:image-20220531161828-1.png]]
++[[image:image-20220526164547-11.png]]
  receive windows for Class A and Class C
--
  Below are the requirement for the End Device to receive the packets.
  * The End Device must open the receive windows: RX1 or RX2
@@ -203,13 +203,12 @@
  * The LoRaWAN server must send a downstream packet, and the gateway forward this downstream packet for this end node.
  * This downstream packet must arrive to the end node while RX1 or RX2 is open.
  * This packet must match the frequency of the RX1 or RX2 window.
--* This packet must match the DataRate of RX1(RX1DR) or RX2 (RX2DR). (% style="color:red" %)**This is the common fail point, because different lorawan server might use different RX2DR and they don't info End Node via ADR message so cause the mismatch. If this happen, user need to change the RX2DR to the right value in end node. In OTAA, LoRaWAN Server will send the RX2DR setting in Join Accept message so the end node will auto adjust. but ABP uplink doesn't support this auto change.**
++* This packet must match the DataRate of RX1(RX1DR) or RX2 (RX2DR). **This is the common fail point, because different lorawan server might use different RX2DR and they don't info End Node via ADR message so cause the mismatch. If this happen, user need to change the RX2DR to the right value in end node. In OTAA, LoRaWAN Server will send the RX2DR setting in Join Accept message so the end node will auto adjust. but ABP uplink doesn't support this auto change.**
  == 5.2 See Debug Info ==
--
  (((
--(% style="color:blue" %)**For LoRaWAN Server**
++**For LoRaWAN Server**
  )))
  (((
@@ -239,7 +239,7 @@
  (((
--(% style="color:blue" %)**For LoRaWAN Gateway**
++**For LoRaWAN Gateway**
  )))
  (((
@@ -254,7 +254,7 @@
  (((
--(% style="color:blue" %)**For End Node**
++**For End Node**
  )))
  (((
@@ -262,18 +262,23 @@
  )))
  (((
--(% style="color:#037691" %)**AT+RX2FQ=869525000**  (%%)   **~-~-->**   The RX2 Window frequency
--(% style="color:#037691" %)**AT+RX2DR=3**          (%%)           **~-~-->**   The RX2 DataRate
--(% style="color:#037691" %)**AT+RX1DL=1000**       (%%)       ** ~-~-->**    Receive Delay 1
--(% style="color:#037691" %)**AT+RX2DL=2000**       (%%)        **~-~--> **   Receive Delay 2
--
  )))
  (((
--(% style="color:blue" %)**when the device running, we can see below info:**
++(% class="box infomessage" %)
++(((
++AT+RX2FQ=869525000     ~-~--> The RX2 Window frequency
++AT+RX2DR=3      ~-~--> The RX2 DataRate
++AT+RX1DL=1000   ~-~--> Receive Delay 1
++AT+RX2DL=2000   ~-~--> Receive Delay 2
  )))
++)))
++(((
++**when the device running, we can see below info:**
++)))
++
  {{{ [12502]***** UpLinkCounter= 0 *****
   [12503]TX on freq 868500000 Hz at DR 0
   [13992]txDone
@@ -287,7 +287,7 @@
  )))
  (((
--(% style="color:blue" %)**Another message:**
++**Another message:**
  )))
  {{{ [12502]***** UpLinkCounter= 0 *****
@@ -302,9 +302,8 @@
 :0012345678}}}
--== 5.3 If problem doesn't solve ==
++== 5.3 If problem doesn’t solve ==
--
  (% style="color:red" %)**If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the sceenshots for each step to check. They include:**
  * End node console to show the transmit freuqency and DR.
@@ -312,11 +312,8 @@
  * Gateway traffic (from server UI) to shows the data exchange between gateway and server.
  * End Node traffic (from server UI) to shows end node activity in server.
--
--
  = 6. Downlink Issue ~-~- Packet REJECTED, unsupported frequency =
--
  (((
  In LoRaWAN, the gatewat will use the frequency specify by the server to transmit a packet as downlink purpose. Each Frequency band has different downlink frequency. and the gateway has a frequency range limited to transmit downlink.
  )))
@@ -342,17 +342,27 @@
  = 7. Decrypt a LoRaWAN Packet =
++~1. LHT65 End device configure:
--(% style="color:blue" %)**1. LHT65 End device configure:**
++(% class="box infomessage" %)
++(((
++**Change to ABP Mode: AT+NJM=0**
++)))
--**Change to ABP Mode:       AT+NJM=0**
--**Change to fix frequency:  AT+CHS=904900000**
--**Change to fix DR:              AT+DR=0**
++(% class="box infomessage" %)
++(((
++**Change to fix frequency: AT+CHS=904900000**
++)))
++(% class="box infomessage" %)
++(((
++**Change to fix DR: AT+DR=0**
++)))
++
  [[image:image-20220526165525-16.png]]
--(% style="color:blue" %)**2. In LG02 , configure to receive above message**
++2. In LG02 , configure to receive above message
  [[image:image-20220526165612-17.png]]
@@ -362,7 +362,7 @@
  [[image:image-20220526171112-21.png]]
--(% style="color:blue" %)**3. Decode the info in web**
++3. Decode the info in web
  [[https:~~/~~/lorawan-packet-decoder-0ta6puiniaut.runkit.sh>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]]
@@ -434,6 +434,7 @@
  * (((
  Some node decoders may not have filtering function, or you need decoders of other servers and formats. Please send an email to [[david.huang@dragino.cc>>mailto:david.huang@dragino.cc]]
++
  )))
@@ -493,15 +493,8 @@
  (((
  (Any combination of 16 bit codes can be used）
--
--
--= 12. I set my device is LoRaWAN Class C mode, why i still see Class A after boot? =
  )))
--Class C only refers to status after OTAA Join successfully. The OTAA Join Process will use Class A mode.
--
--
--
  (% class="wikigeneratedid" %)

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1		-XWiki.Xiaoling

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