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20	20	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]]
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		-
24	24	= 2. How it works =
25	25
26	26
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161	161	* User can use other language ,not limited to Lua, just make sure the return is what you want to send.
162	162
163	163
164		-
165	165	== 2.2 Downstream ==
166	166
167	167
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195	195
196	196
197	197
198		-
199	199	(% style="color:blue" %)**Completely exmaple:**
200	200
201	201	* **Old version:** echo 018193F4,imme,hex,0101 > /var/iot/push/test
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203	203
204	204
205	205
206		-
207	207	(% style="color:#037691" %)**Downstream Frequency**
208	208
209	209	The LG308 will use the RX2 window info to send the downstream payload, use the default LoRaWAN settings, as below:
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219	219
220	220
221	221
222		-
223	223	(% style="color:#037691" %)**Examples:**
224	224
225	225	(% class="box" %)
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226	226	(((
227	227	we can use echo command to create files in LG308 for downstream.
228	228	root@dragino-1d25dc:~~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
229		-)))
230	230
231		-(% class="box" %)
232		-(((
	225	+
233	233	**1)** From logread -f of gateway, we can see it has been added as pedning.
234	234	lora_pkt_fwd[4286]: INFO~~ [DNLK]Looking file : test
235	235	lora_pkt_fwd[4286]: INFO~~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
236	236	lora_pkt_fwd[4286]: INFO~~ [DNLK] DNLINK PENDING!(1 elems).
237		-)))
238	238
239		-(% class="box" %)
240		-(((
	231	+
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		-)))
245	245
246		-(% class="box" %)
247		-(((
	236	+
248	248	**3)** and the end node will got:
249	249	[5764825]~*~*~*~** UpLinkCounter= 98 ~*~*~*~**
250	250	[5764827]TX on freq 905300000 Hz at DR 0
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257	257	Rssi= -41
258	258	Receive data
259	259	(% style="color:#037691" %)**2:12345678**  (%%) ~-~-> Hex
260		-)))
261	261
262		-(% class="box" %)
263		-(((
	250	+
264	264	**4) **If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
265	265	[5955877]~*~*~*~** UpLinkCounter= 102 ~*~*~*~**
266	266	[5955879]TX on freq 904100000 Hz at DR 0