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1		-
	1	+**Table of Contents:**
2	2
3		-= Introduction =
	3	+{{toc/}}
4	4
	5	+
	6	+
	7	+= 1. Introduction =
	8	+
	9	+
5	5	The Dragino LoRaWAN gateway can commuicate with LoRaWAN ABP End Node without the need of LoRaWAN server. It can be used in some cases such as:
6	6
7	7	* No internet connection.
8		-* User wants to get data forward in gateway and forward to their server base on MQTT/HTTP, etc. (Combine ABP communication method and [[MQTT forward together>>url:https://wiki.dragino.com/index.php/MQTT_Forward_Instruction]]).
9	9
	14	+* User wants to get data forward in gateway and forward to their server base on MQTT/HTTP, etc. (Combine ABP communication method and [[MQTT forward together>>MQTT Forward Instruction]]).
10	10
11		-The basic of this feature is the decoding of LoRaWAN ABP End Node. Requirements:
	16	+(((
	17	+The basic of this feature is the decoding of (% style="color:red" %)**LoRaWAN ABP End Node**(%%). Requirements:
	18	+)))
12	12
13		-1. LoRaWAN End Node in ABP mode. Make sure your end node works in this mode. End node most are default set to OTAA mode
14		-1. LoRaWAN Gateway model: [[LPS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/148-lps8.html]], [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]], [[DLOS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/160-dlos8.html]] ,[[LIG16>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/171-lig16.html]]
15		-1. Firmware version for below instruction:[[Since LG02_LG08~~-~~-build-v5.4.1593400722-20200629-1120>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]
	20	+* LoRaWAN End Node in ABP mode. Make sure your end node works in this mode. End node most are default set to OTAA mode
16	16
	22	+* LoRaWAN Gateway model: [[LPS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/148-lps8.html]], [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]], [[DLOS8>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/160-dlos8.html]] ,[[LIG16>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/171-lig16.html]]
17	17
18		-= How it works =
	24	+* Firmware version for below instruction:  **[[(% style="color:purple" %)Since LG02_LG08~~-~~-build-v5.4.1593400722-20200629-1120>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]](%%)**
19	19
20	20
21		-\\Video Instruction: [[https:~~/~~/youtu.be/ZBjXwmp7rwM>>url:https://youtu.be/ZBjXwmp7rwM]]
	27	+= 2. How it works =
22	22
23	23
24		-\\
	30	+(% style="color:#037691" %)**Video Instruction**(%%): **[[https:~~/~~/youtu.be/ZBjXwmp7rwM>>url:https://youtu.be/ZBjXwmp7rwM]]**
25	25
	32	+
26	26	Assume we have the LoRaWAN tracker LGT92 which works in ABP mode and US915 band. It has below keys:
27	27
28		-{{{AT+NWKSKEY=72 32 63 95 dd 8f e2 b2 13 66 e4 35 93 8f 55 df
	35	+(% class="box infomessage" %)
	36	+(((
	37	+**AT+NWKSKEY=72 32 63 95 dd 8f e2 b2 13 66 e4 35 93 8f 55 df
29	29	AT+APPSKEY=b3 17 f8 14 7a 43 27 8a 6a 31 c4 47 3d 55 5d 33
30		-AT+DADDR=2602111D
31		-}}}
	39	+AT+DADDR=2602111D**
	40	+)))
32	32
	42	+(((
33	33	and we have the LG308 works and US915 band and support ABP decryption. User can input these keys in LG308 so the LG308 can communicate with LGT92.
34	34
	45	+
	46	+)))
	47	+
35	35	We need to input above keys in LG308 and enable ABP decryption.
36	36
37		-[[~[~[image:https://wiki.dragino.com/images/thumb/5/55/LG308_MQTT_1.png/600px-LG308_MQTT_1.png~|~|height="329" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LG308_MQTT_1.png]]
38	38
	51	+[[image:image-20220527161119-1.png]]
	52	+
	53	+
39	39	Input the ABP keys in LG308
40	40
41	41
42		-== Upstream ==
	57	+== 2.1 Upstream ==
43	43
	59	+
44	44	Now when this End Node (Dev Addr=2602111D) send a uplink packet. When this packet arrive LG308, LG308 will decode it and put the decode data on the file /var/iot/channels/2602111D . So we have this data for further process with other applications in LG308.
45	45
46		-We can see the log of LG308 to know this packet arrive
	62	+(((
	63	+We can see the log of LG308 to know this packet arrive.
47	47
48		-[[~[~[image:https://wiki.dragino.com/images/thumb/1/16/ABP_DECODE_2.png/600px-ABP_DECODE_2.png~|~|height="205" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:ABP_DECODE_2.png]]
	65	+
	66	+)))
49	49
50		-LG308 log by "logread -f" command
	68	+[[image:image-20220527161149-2.png]]
51	51
52	52
	71	+LG308 log by "(% style="color:red" %)**logread -f**" (%%)command
	72	+
	73	+
	74	+
53	53	The data of End Node is stored in the file /var/iot/channels/2602111D. We can use hexdump command to check it.
54	54
55		-{{{root@dragino-1d25dc:~# hexdump /var/iot/channels/2602111D
56		-0000000 4646 4646 4646 3946 3030 3030 3030 3546 --> Got RSSI and SNR
57		-0000010 cc0c 0b63 0266 017f ff7f ff00 --> Payload
	77	+(% class="box" %)
	78	+(((
	79	+root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
	80	+0000000 (% style="color:#037691" %)**4646 4646 4646 3946 3030 3030 3030 3546**(%%)      ~-~-> Got RSSI and SNR
	81	+0000010 (% style="color:#037691" %)**cc0c 0b63 0266 017f ff7f ff00 **(%%) ~-~-> Payload
58	58	000001c
59		-}}}
	83	+)))
60	60
61		-* RSSI: 4646 4646 4646 3946 = 0xFFFF FF9F : So RSSI = (0xFFFF FF9F - 0x100000000) = -97
62		-* SNR: 3030 3030 3030 3546 = 0x0000 005F = 95, need to divide 10 so SNR is 9.5
63		-* Payload: 0xcc0c 0b63 0266 017f ff7f ff00
	85	+* **RSSI**: 4646 4646 4646 3946 = 0xFFFF FF9F : So RSSI = (0xFFFF FF9F - 0x100000000) = -97
64	64
	87	+* **SNR**: 3030 3030 3030 3546 = 0x0000 005F = 95, need to divide 10 so SNR is 9.5
65	65
66		-{{{Notice 1: The data file stored in LG308 for the end node is bin file. If the end node sends ASCII string to gateway, the output will as below:
67		-in LGT92, use AT+SEND=12:hello world to send ASCII string
68		-root@dragino-1d25dc:~# hexdump /var/iot/channels/2602111D
	89	+* **Payload**: 0xcc0c 0b63 0266 017f ff7f ff00
	90	+
	91	+(% class="box" %)
	92	+(((
	93	+(% style="color:red" %)**Notice 1**(%%): The data file stored in LG308 for the end node is bin file. If the end node sends ASCII string to gateway, the output will as below:
	94	+in LGT92, use (% style="color:#037691" %)**AT+SEND=12:hello world** (%%)to send ASCII string
	95	+root@dragino-1d25dc:~~# hexdump /var/iot/channels/2602111D
69	69	0000000 4646 4646 4646 3946 3030 3030 3030 3546
70		-0000010 6865 6c6c 6f20 776f 726c 6400 --> Got ASCII code "hello world"
	97	+0000010 6865 6c6c 6f20 776f 726c 6400      ~-~-> Got ASCII code "hello world"
71	71	000001c
72		-}}}
	99	+)))
73	73
74		-{{{Notice 2: The upstream payload length should match the LoRaWAN length requirement (max length depends on Frequency and DR), otherwise the gateway can't decode the payload.
75		-}}}
76	76
77		-=== Decode Method ===
	102	+(% class="box" %)
	103	+(((
	104	+(% style="color:red" %)**Notice 2**(%%): The upstream payload length should match the LoRaWAN length requirement (max length depends on Frequency and DR), otherwise the gateway can't decode the payload.
	105	+)))
78	78
79		-The decode methods: ASCII String, Decode_LHT65 doesn't affect how the sensor data is stored, they are to define how should the sensor data to be sent.
80	80
	108	+=== 2.2.1 Decode Method ===
	109	+
	110	+
	111	+The decode methods: (% style="color:#037691" %)**ASCII String, Decode_LHT65**(%%) doesn't affect how the sensor data is stored, they are to define how should the sensor data to be sent.
	112	+
81	81	For example we have a LHT65 , works in ABP mode and gateway successful get the data, which are:
82	82
83		-{{{root@dragino-1baf44:~# hexdump /var/iot/channels/01826108
	115	+(% class="box" %)
	116	+(((
	117	+root@dragino-1baf44:~~# hexdump /var/iot/channels/01826108
84	84	0000000 4646 4646 4646 4537 3030 3030 3030 3438
85		-0000010 ccd1 7fff 7fff 017f ff7f ff00
	119	+0000010 ccd1 7fff 7fff 017f ff7f ff00
86	86	000001c
87		-}}}
	121	+)))
88	88
	123	+
89	89	If we choose ASCII decoder, the MQTT process will send out with mqtt-data:
90	90
91		-{{{Sun Sep 27 04:33:16 2020 user.notice root: [IoT.MQTT]:pub_topic[-t]: dragino-1baf44/01826108/data
	126	+(% class="box" %)
	127	+(((
	128	+Sun Sep 27 04:33:16 2020 user.notice root: [IoT.MQTT]:pub_topic[-t]: dragino-1baf44/01826108/data
92	92	Sun Sep 27 04:33:16 2020 user.notice root: [IoT.MQTT]:decoder: ASCII
93		-Sun Sep 27 04:33:16 2020 user.notice root: [IoT.MQTT]:mqtt_data[-m]: ffffffe700000048ccd17fff7fff017fff7fff00
94		-}}}
	130	+Sun Sep 27 04:33:16 2020 user.notice root: [IoT.MQTT]:mqtt_data[-m]: (% style="color:#037691" %)**ffffffe700000048ccd17fff7fff017fff7fff00**
	131	+)))
95	95
	133	+
96	96	If we choose Decode_LHT65, the MQTT process will send out with mqtt-data
97	97
98		-{{{Sun Sep 27 04:36:45 2020 user.notice root: [IoT.MQTT]:pub_topic[-t]: dragino-1baf44/01826108/data
	136	+(% class="box" %)
	137	+(((
	138	+Sun Sep 27 04:36:45 2020 user.notice root: [IoT.MQTT]:pub_topic[-t]: dragino-1baf44/01826108/data
99	99	Sun Sep 27 04:36:45 2020 user.notice root: [IoT.MQTT]:decoder: Dragino_LHT65
100		-Sun Sep 27 04:36:45 2020 user.notice root: [IoT.MQTT]:mqtt_data[-m]: {"Hum_SHT":32.7,"BatV":3.281,"TempC_DS":32.9,
101		-"EXT":"Temperature Sensor","RSSI":-24,"TempC_SHT":85.0,"SNR":8.2,"ext_sensor":0}
102		-}}}
	140	+Sun Sep 27 04:36:45 2020 user.notice root: [IoT.MQTT]:mqtt_data[-m]:** (% style="color:#037691" %){"Hum_SHT":32.7,"BatV":3.281,"TempC_DS":32.9,
	141	+"EXT":"Temperature Sensor","RSSI":-24,"TempC_SHT":85.0,"SNR":8.2,"ext_sensor":0}(%%)**
	142	+)))
103	103
104	104	Above scripts are store in /etc/lora/decoder/. User can put their scripts here and select it in the UI.
105	105
106	106
107		-=== How to Decode My End Node ===
	147	+=== 2.2.2 How to Decode My End Node ===
108	108
109		-1/ Configure the ABP keys for your end node in the gateway. enable ABP decode in Web UI
110	110
111		-2/ Don't choose MQTT service, use LoRaWAN.
	150	+**1.** Configure the ABP keys for your end node in the gateway. enable ABP decode in Web UI
112	112
113		-3/ When your end node send a message to the gateway, there will be a file store in /var/iot/channels. full path should be /var/iot/channels/END_NODE_DEV_ADDR
	152	+**2. **Don't choose MQTT service, use LoRaWAN.
114	114
115		-4/ Use the /etc/lora/decoder/Dragino_LHT65 as template to decode your payload. This script is written in Lua language. User can manually call this script when you see the data file in /var/iot/channels by running:
	154	+**3.** When your end node send a message to the gateway, there will be a file store in /var/iot/channels. full path should be /var/iot/channels/END_NODE_DEV_ADDR
116	116
	156	+**4.** Use the /etc/lora/decoder/Dragino_LHT65 as template to decode your payload. This script is written in Lua language. User can manually call this script when you see the data file in /var/iot/channels by running:
	157	+
117	117	{{{/etc/lora/decoder/Dragino_LHT65 END_NODE_DEV_ADDR
118	118	}}}
119	119
120		-5/ What you see as output is the MQTT data device will upload, user's end node has different payload compare with LHT65, most properly this file will report with error. User need to modify to match the actual payload. Some notice:
	161	+**5.** What you see as output is the MQTT data device will upload, user's end node has different payload compare with LHT65, most properly this file will report with error. User need to modify to match the actual payload.
121	121
	163	+
	164	+(% style="color:red" %)
	165	+**Some notice:**
	166	+
122	122	* RSSI and SNR are added when gateway receive the packet, so there is always this field.
	168	+
123	123	* If you rename the file, please make it executable.
	170	+
124	124	* See this link for lua.bit module: [[http:~~/~~/luaforge.net/projects/bit/>>url:http://luaforge.net/projects/bit/]]
	172	+
125	125	* Lua json module: [[http:~~/~~/json.luaforge.net/>>url:http://json.luaforge.net/]]
	174	+
126	126	* the last line return is what will be used for MQTT
	176	+
127	127	* User can use other language ,not limited to Lua, just make sure the return is what you want to send.
128	128
	179	+== 2.2 Downstream ==
129	129
130		-== Downstream ==
131	131
132	132	In LG308, we can create a file in the directory /var/iot/push for downstream purpose. We recommend using each command to generate this file. This file will be used for transmission and auto-deleted after used
133	133
134	134	The file should use below format:
135	135
	186	+(% style="color:#037691" %)**dev_addr,imme/time,txt/hex,payload**
136	136
137		-dev_addr,imme/time,txt/hex,payload
138	138
139		-Since fimware > Dragino-v2 lgw-5.4.1608518541 . Support more option
	189	+Since fimware > [[Dragino lgw~~-~~-build-v5.4.1668567157>>https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LG308-LG301/Firmware/Release/]] . Support more option
140	140
141		-dev_addr,imme/time,txt/hex,payload,txpw,txbw,SF,frequency,rxwindow
	191	+(% style="color:#037691" %)**dev_addr,imme/time,txt/hex,payload,txpw,txbw,SF,frequency,rxwindow,Fport**
142	142
143		-* dev_addr: Inptu the device address
144		-* imme/time:
	193	+* **dev_addr:** Inptu the device address
	194	+
	195	+* **imme/time:**
145	145	** imme: send downstream immediately,For Class C end node.
146	146	** time: send downstream after receive device's uplink. For Class A end node
147		-* txt/hex:
	198	+
	199	+* **txt/hex:**
148	148	** txt: send payload in ASCII
149	149	** hex: send payload in HEX
150		-* payload: payload to be sent, payload lenght should match the LoRaWAN protocol requirement.
151		-* txpw: Transmit Power. example: 20
152		-* txbw: bandwidth:
	202	+
	203	+* **payload: **payload to be sent, payload lenght should match the LoRaWAN protocol requirement.
	204	+
	205	+* **txpw:** Transmit Power. example: 20
	206	+
	207	+* **txbw:** bandwidth:
153	153	** 1: 500 kHz
154	154	** 2: 250 kHz
155	155	** 3: 125 kHz
156	156	** 4: 62.5 kHz
157		-* SF: Spreading Factor : SF7/SF8/SF9/SF10/SF11/SF12
158		-* Frequency: Transmit Frequency: example: 923300000
159		-* rxwindow: transmit on Rx1Window or Rx2Window.
	212	+* **SF:** Spreading Factor : SF7/SF8/SF9/SF10/SF11/SF12
160	160
	214	+* **Frequency:** Transmit Frequency: example: 923300000
161	161
162		-Completely exmaple:
	216	+* **rxwindow:** transmit on Rx1Window or Rx2Window.
163	163
164		-* Old version: echo 018193F4,imme,hex,0101 > /var/iot/push/test
165		-* New version: echo 018193F4,imme,hex,0101,20,1,SF12,923300000,2 > /var/iot/push/test
	218	+* **Fport: **Transmit port,example:8
166	166
167	167
168		-Downstream Frequency
169	169
	222	+(% style="color:blue" %)**Completely exmaple:**
	223	+
	224	+* **Old version:** echo 018193F4,imme,hex,0101 > /var/iot/push/test
	225	+
	226	+* **New version:** echo 018193F4,imme,hex,0101,20,1,SF12,923300000,2,8 > /var/iot/push/test
	227	+
	228	+
	229	+
	230	+Downstream(% style="color:#037691" %)** Frequency:**
	231	+
170	170	The LG308 will use the RX2 window info to send the downstream payload, use the default LoRaWAN settings, as below:
171	171
172	172	* EU868: 869.525Mhz, DR0(SF12BW125)
	235	+
173	173	* US915: 923.3Mhz, SF12 BW500
	237	+
174	174	* CN470: 505.3Mhz, SF12 BW125
	239	+
175	175	* AU915: 923.3Mhz, SF12 BW500
	241	+
176	176	* AS923: 923.2Mhz, SF10 BW125
	243	+
177	177	* KR920: 921.9Mhz, SF12 BW125
	245	+
178	178	* IN865: 866.55Mhz, SF10 BW125
	247	+
179	179	* RU864: 869.1Mhz, SF12 BW125
180	180
	250	+(% style="color:#037691" %)**Examples:**
181	181
182		-Examples:
	252	+(% class="box" %)
	253	+(((
	254	+we can use echo command to create files in LG308 for downstream.
	255	+root@dragino-1d25dc:~~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
183	183
184		-{{{we can use echo command to create files in LG308 for downstream.
185		-root@dragino-1d25dc:~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
186	186
187		-1) From logread -f of gateway, we can see it has been added as pedning.
188		-lora_pkt_fwd[4286]: INFO~ [DNLK]Looking file : test
189		-lora_pkt_fwd[4286]: INFO~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
190		-lora_pkt_fwd[4286]: INFO~ [DNLK] DNLINK PENDING!(1 elems).
	258	+**1)** From logread -f of gateway, we can see it has been added as pedning.
	259	+lora_pkt_fwd[4286]: INFO~~ [DNLK]Looking file : test
	260	+lora_pkt_fwd[4286]: INFO~~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
	261	+lora_pkt_fwd[4286]: INFO~~ [DNLK] DNLINK PENDING!(1 elems).
191	191
192		-2) When there is an upstrea from end node, this downstream will be sent and shows:
	263	+
	264	+**2)** When there is an upstrea from end node, this downstream will be sent and shows:
193	193	lora_pkt_fwd[4286]: INFO: tx_start_delay=1497 (1497.000000) - (1497, bw_delay=0.000000, notch_delay=0.000000)
194	194	lora_pkt_fwd[4286]: [LGWSEND]lgw_send done: count_us=3537314420, freq=923300000, size=17
195	195
196		-3) and the end node will got:
197		-[5764825]***** UpLinkCounter= 98 *****
	268	+
	269	+**3)** and the end node will got:
	270	+[5764825]~*~*~*~** UpLinkCounter= 98 ~*~*~*~**
198	198	[5764827]TX on freq 905300000 Hz at DR 0
199	199	Update Interval: 60000 ms
200	200	[5765202]txDone
...	...	@@ -204,11 +204,11 @@
204	204	[5767501]rxDone
205	205	Rssi= -41
206	206	Receive data
207		-2:12345678 --> Hex
208		-}}}
	280	+(% style="color:#037691" %)**2:12345678**  (%%) ~-~-> Hex
209	209
210		-{{{4) If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
211		-[5955877]***** UpLinkCounter= 102 *****
	282	+
	283	+**4) **If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
	284	+[5955877]~*~*~*~** UpLinkCounter= 102 ~*~*~*~**
212	212	[5955879]TX on freq 904100000 Hz at DR 0
213	213	Update Interval: 60000 ms
214	214	[5956254]txDone
...	...	@@ -218,114 +218,142 @@
218	218	[5958595]rxDone
219	219	Rssi= -37
220	220	Receive data
221		-2:3132333435363738 --> ASCII string "12345678"
222		-}}}
	294	+(% style="color:#037691" %)**2:3132333435363738**(%%) ~-~-> ASCII string "12345678"
	295	+)))
223	223
224		-= Example 1: Communicate with LT-22222-L =
225	225
	298	+= 3. Example 1: Communicate with LT-22222-L =
	299	+
	300	+
226	226	Script can be download from: [[Example Script 1>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/customized_script/&file=talk_to_lt-22222-l_v0.1.sh]]
227	227
228		-{{{#!/bin/sh
	303	+(% class="box" %)
	304	+(((
	305	+//#!/bin/sh
229	229	# This scripts shows how to use LPS8/LG308/DLOS8 to communicate with two LoRaWAN End Nodes, without the use of internet or LoRaWAN server
230	230	#
231		-# Hardware Prepare:
232		-# 1. LT-22222-L x 2, both are configured to work in
233		-# a) Class C ;
234		-# b) ABP Mode ;
	308	+# Hardware Prepare:
	309	+# 1. LT-22222-L x 2, both are configured to work in
	310	+#   a) Class C ;
	311	+# b) ABP Mode ;
235	235	# c) AT+Mod=1
236		-# 2. LPS8,
237		-# a) Firmware version >
238		-# b) Input the LT-22222-L keys in LPS so LPS8 can talk with them.
239		-# c) Lorawan server choose built-in
240		-# d) in Custom page, select custom script to point to this script. (put this script in /etc/iot/scripts directory)
241		-#
242		-# How it works?
243		-# a) Devices 1 sends a uplink payload to LPS8. LPS8 will get the DI1 and DI2 info from the payload
244		-# b) LPS8 will send a message to Device 2 to set the Device2 DO1 = Device1 DI1, and Device DO2 = Device DI2.
245		-# c) Device2 will change DO1 and DO2 to according to the message from LPS8, and send back a message to LPS8 with the its DO1
246		-# and DO2 value. LPS8 will ask Device1 to change its DO1 to same as Device 2, and change the DO2 to the same as Device 2.
247		-# ( The purpose of this step is to show that the Device2 has already do the change there).
248		-#
249		-# For example: If current status of Device1 and Device2 leds shows:
250		-# Device1: DI1: ON, DI2: ON , DO1: OFF, DO2: OFF
251		-# Device2: DI1: OFF, DI2: OFF , DO1: OFF, DO2: OFF
	313	+# 2. LPS8,
	314	+#   a) Firmware version >
	315	+#   b) Input the LT-22222-L keys in LPS so LPS8 can talk with them.
	316	+#   c) Lorawan server choose built-in
	317	+#   d) in Custom page, select custom script to point to this script. (put this script in /etc/iot/scripts directory)
252	252	#
253		-# Step2 will cause below change:
254		-# Device1: DI1: ON, DI2: ON , DO1: OFF, DO2: OFF
255		-# Device2: DI1: OFF, DI2: OFF , DO1: ON, DO2: ON
256		-#
257		-# Step3 will cause below change:
258		-# Device1: DI1: ON, DI2: ON , DO1: ON, DO2: ON
259		-# Device2: DI1: OFF, DI2: OFF , DO1: ON, DO2: ON
260		-# So if a person is in the Device 1 location, he can check if the DO LED match DI LEDs on Device 1 to confirm
261		-# whether the Device 2 has been changed.}}}
	319	+# How it works?
	320	+#   a) Devices 1 sends a uplink payload to LPS8. LPS8 will get the DI1 and DI2 info from the payload
	321	+#   b) LPS8 will send a message to Device 2 to set the Device2 DO1 = Device1 DI1, and Device DO2 = Device DI2.
	322	+#   c) Device2 will change DO1 and DO2 to according to the message from LPS8, and send back a message to LPS8 with the its DO1
	323	+#   and DO2 value. LPS8 will ask Device1 to change its DO1 to same as Device 2, and change the DO2 to the same as Device 2.
	324	+#   ( The purpose of this step is to show that the Device2 has already do the change there).
	325	+#
	326	+#  For example: If current status of Device1 and Device2 leds shows:
	327	+#  Device1: DI1: ON, DI2: ON , DO1: OFF,  DO2: OFF
	328	+#  Device2: DI1: OFF, DI2: OFF , DO1: OFF,  DO2: OFF
	329	+#
	330	+#  Step2  will cause below change:
	331	+#  Device1: DI1: ON, DI2: ON , DO1: OFF,  DO2: OFF
	332	+#  Device2: DI1: OFF, DI2: OFF , DO1: ON,  DO2: ON
	333	+#
	334	+#  Step3 will cause below change:
	335	+#  Device1: DI1: ON, DI2: ON , DO1: ON,  DO2: ON
	336	+#  Device2: DI1: OFF, DI2: OFF , DO1: ON,  DO2: ON
	337	+#  So if a person is in the Device 1 location, he can check if the DO LED match DI LEDs on Device 1 to confirm
	338	+#  whether the Device 2 has been changed.//
	339	+)))
262	262
263		-~1. Input keys
264	264
265		-[[~[~[image:https://wiki.dragino.com/images/thumb/b/bf/LPS8_LT-22222_1.png/600px-LPS8_LT-22222_1.png~|~|height="335" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_LT-22222_1.png]]
	342	+(% style="color:blue" %)**1. Input keys**
266	266
	344	+
	345	+[[image:image-20220527162450-3.png]]
	346	+
267	267	Input Keys in LPS8
268	268
269		-2. Make sure the LPS8 and LT use the same frequency bands, choose EU868 in this test.
270	270
271		-3. Choose Built-in server
272	272
273		-[[~[~[image:https://wiki.dragino.com/images/thumb/d/d7/LPS8_LT-22222_2.png/600px-LPS8_LT-22222_2.png~|~|height="264" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_LT-22222_2.png]]
	351	+(% style="color:blue" %)**2. Make sure the LPS8 and LT use the same frequency bands, choose EU868 in this test.**
274	274
	353	+
	354	+(% style="color:blue" %)**3. Choose Built-in server**
	355	+
	356	+
	357	+[[image:image-20220527162518-4.png]]
	358	+
275	275	Choose Built-in server
276	276
277		-4. Run the script.
278	278
279		-[[~[~[image:https://wiki.dragino.com/images/thumb/3/39/LPS8_LT-22222_3.png/600px-LPS8_LT-22222_3.png~|~|height="389" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_LT-22222_3.png]]
280	280
	363	+(% style="color:blue" %)**4. Run the script.**
	364	+
	365	+
	366	+[[image:image-20220722115213-2.png]]
	367	+
281	281	Run the script
282	282
283		-5. Output:
284	284
285		-[[~[~[image:https://wiki.dragino.com/images/thumb/f/fe/LPS8_LT-22222_4.png/600px-LPS8_LT-22222_4.png~|~|height="433" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_LT-22222_4.png]]
286	286
	372	+(% style="color:blue" %)**5. Output:**
	373	+
	374	+
	375	+[[image:image-20220722115133-1.png]]
	376	+
287	287	Output from LPS8
288	288
289	289
290		-= Example 2: Communicate to TCP Server =
	380	+= 4. Example 2: Communicate to TCP Server =
291	291
292		-[[~[~[image:https://wiki.dragino.com/images/thumb/7/75/LPS8_TCP_0.png/600px-LPS8_TCP_0.png~|~|height="370" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_TCP_0.png]]
293	293
	383	+[[image:image-20220527162648-7.png]]
	384	+
294	294	Network Structure
295	295
296	296
297	297	Full instruction video inlcude how to write scripts to fit server needed is here:
298	298
	390	+(% style="color:#037691" %)**Video Instruction**(%%): **[[https:~~/~~/youtu.be/-nevW6U2TsE>>url:https://youtu.be/-nevW6U2TsE]]**
299	299
300		-Video Instruction: [[https:~~/~~/youtu.be/-nevW6U2TsE>>url:https://youtu.be/-nevW6U2TsE]]
	392	+(% style="display:none" %) (%%)
301	301
	394	+(% style="color:red" %)**Note: Firmware version must be higher than lgw-5.4.1607519907**
302	302
303		-Note: Firmware version must be higher than lgw-5.4.1607519907
304	304
305	305	Assume we already set up ABP keys in the gateway:
306	306
307		-[[~[~[image:https://wiki.dragino.com/images/thumb/b/bf/LPS8_LT-22222_1.png/600px-LPS8_LT-22222_1.png~|~|height="335" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_LT-22222_1.png]]
	399	+[[image:image-20220527162852-8.png]]
308	308
309	309	Input Keys in LPS8
310	310
311		-run socket tool in PC
312	312
313		-[[~[~[image:https://wiki.dragino.com/images/thumb/4/4b/LPS8_TCP_2.png/600px-LPS8_TCP_2.png~|~|height="212" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_TCP_2.png]]
314	314
	405	+(% style="color:blue" %)**run socket tool in PC**
	406	+
	407	+
	408	+[[image:image-20220527163028-9.png]]
	409	+
	410	+
315	315	Socket tool
316	316
317	317
318		-Input Server address and port
319	319
320		-[[~[~[image:https://wiki.dragino.com/images/thumb/c/c6/LPS8_TCP_3.png/600px-LPS8_TCP_3.png~|~|height="306" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_TCP_3.png]]
	415	+(% style="color:blue" %)**Input Server address and port**
321	321
	417	+
	418	+[[image:image-20220527163106-10.png]]
	419	+
322	322	Input Server address and port
323	323
324	324
325		-See value receive in socket tool. :
326	326
327		-[[~[~[image:https://wiki.dragino.com/images/thumb/2/20/LPS8_TCP_4.png/600px-LPS8_TCP_4.png~|~|height="219" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:LPS8_TCP_4.png]]
	424	+(% style="color:blue" %)**See value receive in socket tool:**
328	328
	426	+
	427	+[[image:image-20220527163144-11.png||height="502" width="1371"]]
	428	+
329	329	value receive in socket tool
330	330
	431	+
331	331	If user want to modify the TCP connection method. He can refer: [[https:~~/~~/github.com/dragino/dragino-packages/blob/lg02/haserl-ui/root/usr/bin/tcp_process.sh>>url:https://github.com/dragino/dragino-packages/blob/lg02/haserl-ui/root/usr/bin/tcp_process.sh]]. Same script is on /usr/bin of gateway.

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