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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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193	193	* **Frequency:** Transmit Frequency: example: 923300000
194	194	* **rxwindow:** transmit on Rx1Window or Rx2Window.
195	195
	194	+
	195	+
196	196	(% style="color:blue" %)**Completely exmaple:**
197	197
198	198	* **Old version:** echo 018193F4,imme,hex,0101 > /var/iot/push/test
199	199	* **New version:** echo 018193F4,imme,hex,0101,20,1,SF12,923300000,2 > /var/iot/push/test
200	200
	201	+
	202	+
201	201	(% style="color:#037691" %)**Downstream Frequency**
202	202
203	203	The LG308 will use the RX2 window info to send the downstream payload, use the default LoRaWAN settings, as below:
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211	211	* IN865: 866.55Mhz, SF10 BW125
212	212	* RU864: 869.1Mhz, SF12 BW125
213	213
	216	+
	217	+
214	214	(% style="color:#037691" %)**Examples:**
215	215
216	216	(% class="box" %)
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217	217	(((
218	218	we can use echo command to create files in LG308 for downstream.
219	219	root@dragino-1d25dc:~~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
220		-)))
221	221
222		-(% class="box" %)
223		-(((
	225	+
224	224	**1)** From logread -f of gateway, we can see it has been added as pedning.
225	225	lora_pkt_fwd[4286]: INFO~~ [DNLK]Looking file : test
226	226	lora_pkt_fwd[4286]: INFO~~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
227	227	lora_pkt_fwd[4286]: INFO~~ [DNLK] DNLINK PENDING!(1 elems).
228		-)))
229	229
230		-(% class="box" %)
231		-(((
	231	+
232	232	**2)** When there is an upstrea from end node, this downstream will be sent and shows:
233	233	lora_pkt_fwd[4286]: INFO: tx_start_delay=1497 (1497.000000) - (1497, bw_delay=0.000000, notch_delay=0.000000)
234	234	lora_pkt_fwd[4286]: [LGWSEND]lgw_send done: count_us=3537314420, freq=923300000, size=17
235		-)))
236	236
237		-(% class="box" %)
238		-(((
	236	+
239	239	**3)** and the end node will got:
240	240	[5764825]~*~*~*~** UpLinkCounter= 98 ~*~*~*~**
241	241	[5764827]TX on freq 905300000 Hz at DR 0
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248	248	Rssi= -41
249	249	Receive data
250	250	(% style="color:#037691" %)**2:12345678**  (%%) ~-~-> Hex
251		-)))
252	252
253		-(% class="box" %)
254		-(((
	250	+
255	255	**4) **If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
256	256	[5955877]~*~*~*~** UpLinkCounter= 102 ~*~*~*~**
257	257	[5955879]TX on freq 904100000 Hz at DR 0
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264	264	Rssi= -37
265	265	Receive data
266	266	(% style="color:#037691" %)**2:3132333435363738**(%%) ~-~-> ASCII string "12345678"
	263	+
	264	+
267	267	)))
268	268
269	269