Wiki source code of Switch LoRaWAN server by rejoin feature

Last modified by Xiaoling on 2024/05/20 09:36

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1.3	1	Table of Contents:
1.2	2
1.1	3	{{toc/}}
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30.1	7	= 1. Introduction =
1.1	8
30.2	9
27.2	10	This chapter describes how to switch LoRaWAN server by rejoin feature.
3.2	11
	12
	13	= 2. What is the rejoin feature? =
	14
30.2	15
28.2	16	Rejoin feature is that if the ACK packet sent by the platform to the node is not received within the set time range, the offline detection will be started.
3.2	17
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30.2	19	== 2.1 Offline Rejoining(LWS007) ==
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	21
3.2	22	(% style="color:blue" %)AT Command: AT+DDETECT
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	24	AT+DDETECT=<Flag>,<ACK_Timout_1>,<ACK_Timout_2> (Default Value: AT+DDETECT=1,1440,2880)
	25
	26	* ACK_Timout_1: Unit: min
	27
	28	* ACK_Timout_2: Unit: min
	29
	30	(% border="1" style="background-color:#f2f2f2; width:562px" %)
	31	\|(% style="background-color:#4f81bd; color:white; width:160px" %)Command Example\|(% style="background-color:#4f81bd; color:white; width:272px" %)Function\|(% style="background-color:#4f81bd; color:white; width:89px" %)Response
	32	\|(% style="width:160px" %)(((
	33	AT+DDETECT=1,1440,2880
	34
	35	value1
	36	)))\|(% style="width:272px" %)Enable online detect\|(% style="width:89px" %)(((
	37	1
	38
	39	OK
	40	)))
	41	\|(% style="width:160px" %)(((
	42	AT+DDETECT=1,?,2880
	43
	44	value2
	45	)))\|(% style="width:272px" %)Online detection packet sending time\|(% style="width:89px" %)(((
	46
	47
	48	OK
	49	)))
	50	\|(% style="width:160px" %)(((
	51	AT+DDETECT=1,1440,？
	52
	53	value3
	54	)))\|(% style="width:272px" %)Process rejoin\|(% style="width:89px" %)(((
	55
	56
	57	OK
	58	)))
	59
	60	(% style="color:blue" %)Downlink Command: 0x32
	61
	62	Format: Command Code (0x32) followed by 2 bytes mode value.
	63
	64	If the downlink payload=320105A00B40, it means set end node to use confirm mode, while type code is 32.
	65
	66	* Example 1: Downlink Payload: 320105A00B40 ~/~/ Set AT+DDETECT=1,1440,2880
30.2	67	0x01 : **Flag
	68	0x05A0 **: ACK_Timout_1 : 1440minutes (24 hours)
	69	0x0B40 **: ACK_Timout_2 : 2880minutes (48 hours)
	70	* Explain: Enable Online Detect, if end node doesn't receive any downlink within ACK_Timout_1( 1440 minutes or 24 hours). End node will use confirmed uplink to send packets during ACK_Timout_1 (the 24th hour) to ACK_Timout_2 ( the 48th hour). If from the 24th to 48th hour, end node got an downlink from server, it will switch back to unconfirmed uplink. end node will restart ACK_Timout_1. If from the 24th to 48th hour, end node still not got any downlink, means device doesn't get ACK from server within last 48 hours. Device will process rejoin, rejoin request interval is AT+RJTDC period. For AU915/ US915, device will use the sub-band used for last join.
3.2	71
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	73
30.2	74	== 2.2 Change Uplink Interval ==
3.2	75
	76
5.1	77	Feature: Change LoRaWAN End Node Transmit Interval.
	78
	79	(% style="color:blue" %)AT Command: AT+TDC
	80
	81	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:727.222px" %)
	82	\|(% style="background-color:#4f81bd; color:white; width:165px" %)Command Example\|(% style="background-color:#4f81bd; color:white; width:227px" %)Function\|(% style="background-color:#4f81bd; color:white; width:329px" %)Response
	83	\|(% style="width:165px" %)AT+TDC=?\|(% style="width:227px" %)Show current transmit Interval\|(% style="width:329px" %)30000(((
	84	OK
	85
	86	the interval is 30000ms = 30s
	87	)))
	88	\|(% style="width:165px" %)AT+TDC=60000\|(% style="width:227px" %)Set Transmit Interval\|(% style="width:329px" %)OK(((
	89	Set transmit interval to 60000ms = 60 seconds
	90	)))
	91
	92	(((
	93	(% style="color:blue" %)Downlink Command: 0x01
	94
	95	Format: Command Code (0x01) followed by 3 bytes time value.
	96	)))
	97
	98	(((
	99	If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
	100	)))
	101
	102	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	103
	104	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	105
3.2	106	(% style="display:none" %) (%%)
	107
5.1	108
3.6	109	= 3. Examples and Explanations =
3.2	110
30.2	111
3.6	112	(% style="color:blue" %)Switching platforms by rejoin function: Use device LHT65N to switch from TTN to ChirpStack as an example.
3.2	113
3.6	114	The following example shows the parameters of the LHT65N. Users need to check the Wiki instructions to confirm the parameters of the equipment they have purchased.
	115	([[User Manual for LoRaWAN End Nodes)>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes]])
3.2	116
5.1	117
3.6	118	== 3.1 Configure appropriate operation times ==
3.2	119
30.2	120
5.1	121	(% style="color:blue" %)Firstly, the user sent downlink commands through the original registration platform (TTN) to modify the required TDC time and offline detection time.(%%)
3.2	122
5.1	123	(% style="color:red" %)Note: Users need to set the TDC time shorter than the offline detection ACK_Timeout_1, the best offline detection time is more than twice the TDC time.
3.2	124
	125
10.2	126	* Configuration via TTN downlink：
3.2	127
11.1	128	[[image:image-20231123170814-4.png\|\|height="631" width="696"]]
3.2	129
30.2	130
11.1	131	(% style="color:red" %)Note: When configuring the device using downlink commands, you need to wait for the original TDC time, and the platform plans downlink after the end node complete uplink.
3.2	132
13.2	133	TDC changed successfully:
	134
	135	[[image:image-20231124102601-1.png\|\|height="543" width="617"]]
	136
	137
11.1	138	Confirm that the TDC configuration is successful, and then configure the offline detection time:
	139
	140
	141	[[image:image-20231123170339-2.png\|\|height="566" width="715"]]
	142
	143
10.2	144	* Configure using the AT commands by Serial Port Utility:
3.2	145
13.2	146	[[image:image-20231124103318-2.png\|\|height="538" width="738"]]
3.2	147
3.4	148
13.2	149	== 3.2 Delete the device and add the device to the new platform ==
3.6	150
	151
22.2	152	Delete device：
3.6	153
22.2	154	[[image:image-20231124104002-3.png\|\|height="302" width="653"]]
3.6	155
22.2	156	[[image:image-20231124104014-4.png\|\|height="210" width="654"]]
3.6	157
	158
22.2	159	Register the device on the new platform and wait for the offline detection time for the device to automatically request to join the network.
3.6	160
22.2	161	[[image:image-20231124112845-8.png\|\|height="449" width="935"]]
3.6	162
22.2	163	[[image:image-20231124113011-9.png\|\|height="450" width="935"]]
3.6	164
22.2	165	[[image:image-20231124111630-6.png\|\|height="537" width="813"]]
3.6	166
	167
	168
22.2	169	== 3.3 Restore the default TDC time and the default offline detection time ==
3.6	170
30.2	171
22.2	172	* (% style="color:blue" %)It is recommended to restore the factory reset directly:
3.6	173
30.1	174	(% style="color:red" %) Downlink payload: 0x04FE
3.6	175
22.2	176	[[image:image-20231124114451-10.png\|\|height="377" width="826"]]
3.6	177
22.2	178	[[image:image-20231124115256-11.png\|\|height="409" width="767"]]
3.6	179
30.1	180
27.2	181	After the delivery is successful, the node is connected to the network again and factory Settings are restored.
3.6	182
27.2	183	[[image:image-20231124141041-1.png\|\|height="395" width="801"]]
	184
	185	[[image:image-20231124141141-2.png\|\|height="460" width="802"]]
	186
	187
22.2	188	* (% style="color:blue" %)If the device has other configurations to keep, users can also choose to configure the default TDC and default offline detection time separately.
3.6	189
27.2	190	[[image:image-20231124142829-4.png\|\|height="451" width="626"]]
3.6	191
	192
27.2	193	[[image:image-20231124142645-3.png\|\|height="452" width="622"]]
3.6	194
	195
27.2	196	(% style="color:red" %)Note: To set these two commands separately, users must restore the default offline detection time before configuring the default TDC time.
3.6	197
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10.2	199
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27.2	204
3.2	205

Wiki source code of Switch LoRaWAN server by rejoin feature

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