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21	21	1. 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/]](%%)**
22	22
23	23
24		-
25	25	= 2. How it works =
26	26
27	27
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78	78	* **SNR**: 3030 3030 3030 3546 = 0x0000 005F = 95, need to divide 10 so SNR is 9.5
79	79	* **Payload**: 0xcc0c 0b63 0266 017f ff7f ff00
80	80
81		-
82		-
83	83	(% class="box" %)
84	84	(((
85	85	(% 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:
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165	165
166	166
167	167
168		-
169	169	== 2.2 Downstream ==
170	170
171	171
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230	230	(((
231	231	we can use echo command to create files in LG308 for downstream.
232	232	root@dragino-1d25dc:~~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
	229	+)))
233	233
234		-
	231	+(% class="box" %)
	232	+(((
235	235	**1)** From logread -f of gateway, we can see it has been added as pedning.
236	236	lora_pkt_fwd[4286]: INFO~~ [DNLK]Looking file : test
237	237	lora_pkt_fwd[4286]: INFO~~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
238	238	lora_pkt_fwd[4286]: INFO~~ [DNLK] DNLINK PENDING!(1 elems).
	237	+)))
239	239
240		-
	239	+(% class="box" %)
	240	+(((
241	241	**2)** When there is an upstrea from end node, this downstream will be sent and shows:
242	242	lora_pkt_fwd[4286]: INFO: tx_start_delay=1497 (1497.000000) - (1497, bw_delay=0.000000, notch_delay=0.000000)
243	243	lora_pkt_fwd[4286]: [LGWSEND]lgw_send done: count_us=3537314420, freq=923300000, size=17
	244	+)))
244	244
245		-
	246	+(% class="box" %)
	247	+(((
246	246	**3)** and the end node will got:
247	247	[5764825]~*~*~*~** UpLinkCounter= 98 ~*~*~*~**
248	248	[5764827]TX on freq 905300000 Hz at DR 0
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255	255	Rssi= -41
256	256	Receive data
257	257	(% style="color:#037691" %)**2:12345678**  (%%) ~-~-> Hex
	260	+)))
258	258
259		-
	262	+(% class="box" %)
	263	+(((
260	260	**4) **If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
261	261	[5955877]~*~*~*~** UpLinkCounter= 102 ~*~*~*~**
262	262	[5955879]TX on freq 904100000 Hz at DR 0
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315	315	#  whether the Device 2 has been changed.//
316	316	)))
317	317
318		-
319	319	**~1. Input keys**
320	320
321	321	[[image:image-20220527162450-3.png]]
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325	325
326	326	**2. Make sure the LPS8 and LT use the same frequency bands, choose EU868 in this test.**
327	327
328		-
329	329	**3. Choose Built-in server**
330	330
331	331	[[image:image-20220527162518-4.png]]

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