Wiki source code of Switch LoRaWAN server by rejoin feature

Version 22.1 by Mengting Qiu on 2023/11/24 11:52

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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
3.3	12	This chapter describes switch LoRaWAN server by rejoin feature.
3.2	13
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	15	= 2. What is the rejoin feature? =
	16
3.3	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
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	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
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	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
	67
13.2	68	*
3.2	69	0x01 : Flag**
	70
	71	0x05A0 : ACK_Timout_1 : 1440minutes (24 hours)
	72
	73	0x0B40 : ACK_Timout_2 : 2880minutes (48 hours)
	74
	75	* 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.
	76
5.1	77	== 2.2 Change Uplink Interval ==
	78
	79	Feature: Change LoRaWAN End Node Transmit Interval.
	80
	81
	82	(% style="color:blue" %)AT Command: AT+TDC
	83
	84	(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:727.222px" %)
	85	\|(% 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
	86	\|(% style="width:165px" %)AT+TDC=?\|(% style="width:227px" %)Show current transmit Interval\|(% style="width:329px" %)30000(((
	87	OK
	88
	89	the interval is 30000ms = 30s
	90	)))
	91	\|(% style="width:165px" %)AT+TDC=60000\|(% style="width:227px" %)Set Transmit Interval\|(% style="width:329px" %)OK(((
	92	Set transmit interval to 60000ms = 60 seconds
	93	)))
	94
	95	(((
	96	(% style="color:blue" %)Downlink Command: 0x01
	97
	98	Format: Command Code (0x01) followed by 3 bytes time value.
	99	)))
	100
	101	(((
	102	If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.
	103	)))
	104
	105	* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
	106
	107	* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
	108
3.2	109	(% style="display:none" %) (%%)
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5.1	111
3.6	112	= 3. Examples and Explanations =
3.2	113
3.6	114	(% style="color:blue" %)Switching platforms by rejoin function: Use device LHT65N to switch from TTN to ChirpStack as an example.
3.2	115
3.6	116	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.
	117	([[User Manual for LoRaWAN End Nodes)>>http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes]])
3.2	118
5.1	119
3.6	120	== 3.1 Configure appropriate operation times ==
3.2	121
5.1	122	(% 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	123
5.1	124	(% 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	125
	126
10.2	127	* Configuration via TTN downlink：
3.2	128
11.1	129	[[image:image-20231123170814-4.png\|\|height="631" width="696"]]
3.2	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"]]
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11.1	138	Confirm that the TDC configuration is successful, and then configure the offline detection time:
	139
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	141	[[image:image-20231123170339-2.png\|\|height="566" width="715"]]
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	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 ==
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10.2	175
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3.2	180

Wiki source code of Switch LoRaWAN server by rejoin feature

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