Wiki source code of Switch LoRaWAN server by rejoin feature

Version 28.2 by Mengting Qiu on 2023/11/24 14:37

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1.3	1	Table of Contents:
1.2	2
1.1	3	{{toc/}}
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2.2	10	= 1. introduction =
3.2	11
27.2	12	This chapter describes how to switch LoRaWAN server by rejoin feature.
3.2	13
	14
	15	= 2. What is the rejoin feature? =
	16
28.2	17	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	18
5.1	19	== 2.1offline rejoining （LWS007) ==
3.2	20
	21	(% style="color:blue" %)AT Command: AT+DDETECT
	22
	23	AT+DDETECT=<Flag>,<ACK_Timout_1>,<ACK_Timout_2> (Default Value: AT+DDETECT=1,1440,2880)
	24
	25	* ACK_Timout_1: Unit: min
	26
	27	* ACK_Timout_2: Unit: min
	28
	29	(% border="1" style="background-color:#f2f2f2; width:562px" %)
	30	\|(% 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
	31	\|(% style="width:160px" %)(((
	32	AT+DDETECT=1,1440,2880
	33
	34	value1
	35	)))\|(% style="width:272px" %)Enable online detect\|(% style="width:89px" %)(((
	36	1
	37
	38	OK
	39	)))
	40	\|(% style="width:160px" %)(((
	41	AT+DDETECT=1,?,2880
	42
	43	value2
	44	)))\|(% style="width:272px" %)Online detection packet sending time\|(% style="width:89px" %)(((
	45
	46
	47	OK
	48	)))
	49	\|(% style="width:160px" %)(((
	50	AT+DDETECT=1,1440,？
	51
	52	value3
	53	)))\|(% style="width:272px" %)Process rejoin\|(% style="width:89px" %)(((
	54
	55
	56	OK
	57	)))
	58
	59	(% style="color:blue" %)Downlink Command: 0x32
	60
	61	Format: Command Code (0x32) followed by 2 bytes mode value.
	62
	63	If the downlink payload=320105A00B40, it means set end node to use confirm mode, while type code is 32.
	64
	65	* Example 1: Downlink Payload: 320105A00B40 ~/~/ Set AT+DDETECT=1,1440,2880
	66
28.2	67	*
3.2	68	0x01 : Flag**
	69
	70	0x05A0 : ACK_Timout_1 : 1440minutes (24 hours)
	71
	72	0x0B40 : ACK_Timout_2 : 2880minutes (48 hours)
	73
	74	* 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.
	75
5.1	76	== 2.2 Change Uplink Interval ==
	77
	78	Feature: Change LoRaWAN End Node Transmit Interval.
	79
	80	(% style="color:blue" %)AT Command: AT+TDC
	81
	82	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:727.222px" %)
	83	\|(% 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
	84	\|(% style="width:165px" %)AT+TDC=?\|(% style="width:227px" %)Show current transmit Interval\|(% style="width:329px" %)30000(((
	85	OK
	86
	87	the interval is 30000ms = 30s
	88	)))
	89	\|(% style="width:165px" %)AT+TDC=60000\|(% style="width:227px" %)Set Transmit Interval\|(% style="width:329px" %)OK(((
	90	Set transmit interval to 60000ms = 60 seconds
	91	)))
	92
	93	(((
	94	(% style="color:blue" %)Downlink Command: 0x01
	95
	96	Format: Command Code (0x01) followed by 3 bytes time value.
	97	)))
	98
	99	(((
	100	If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
	101	)))
	102
	103	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	104
	105	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	106
3.2	107	(% style="display:none" %) (%%)
	108
5.1	109
3.6	110	= 3. Examples and Explanations =
3.2	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
5.1	120	(% 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	121
5.1	122	(% 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	123
	124
10.2	125	* Configuration via TTN downlink：
3.2	126
11.1	127	[[image:image-20231123170814-4.png\|\|height="631" width="696"]]
3.2	128
11.1	129	(% 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	130
13.2	131	TDC changed successfully:
	132
	133	[[image:image-20231124102601-1.png\|\|height="543" width="617"]]
	134
	135
11.1	136	Confirm that the TDC configuration is successful, and then configure the offline detection time:
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	138
	139	[[image:image-20231123170339-2.png\|\|height="566" width="715"]]
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	141
10.2	142	* Configure using the AT commands by Serial Port Utility:
3.2	143
13.2	144	[[image:image-20231124103318-2.png\|\|height="538" width="738"]]
3.2	145
3.4	146
13.2	147	== 3.2 Delete the device and add the device to the new platform ==
3.6	148
	149
22.2	150	Delete device：
3.6	151
22.2	152	[[image:image-20231124104002-3.png\|\|height="302" width="653"]]
3.6	153
22.2	154	[[image:image-20231124104014-4.png\|\|height="210" width="654"]]
3.6	155
	156
22.2	157	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	158
22.2	159	[[image:image-20231124112845-8.png\|\|height="449" width="935"]]
3.6	160
22.2	161	[[image:image-20231124113011-9.png\|\|height="450" width="935"]]
3.6	162
22.2	163	[[image:image-20231124111630-6.png\|\|height="537" width="813"]]
3.6	164
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	166
22.2	167	== 3.3 Restore the default TDC time and the default offline detection time ==
3.6	168
22.2	169	* (% style="color:blue" %)It is recommended to restore the factory reset directly:
3.6	170
22.2	171	(% style="color:red" %) downlink payload: 0x04FE
3.6	172
22.2	173	[[image:image-20231124114451-10.png\|\|height="377" width="826"]]
3.6	174
22.2	175	[[image:image-20231124115256-11.png\|\|height="409" width="767"]]
3.6	176
27.2	177	After the delivery is successful, the node is connected to the network again and factory Settings are restored.
3.6	178
27.2	179	[[image:image-20231124141041-1.png\|\|height="395" width="801"]]
	180
	181	[[image:image-20231124141141-2.png\|\|height="460" width="802"]]
	182
	183
22.2	184	* (% 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	185
27.2	186	[[image:image-20231124142829-4.png\|\|height="451" width="626"]]
3.6	187
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27.2	189	[[image:image-20231124142645-3.png\|\|height="452" width="622"]]
3.6	190
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27.2	192	(% 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	193
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10.2	195
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27.2	200
3.2	201

Wiki source code of Switch LoRaWAN server by rejoin feature

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