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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	+
23	23	= 2. How it works =
24	24
25	25
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160	160	* User can use other language ,not limited to Lua, just make sure the return is what you want to send.
161	161
162	162
	164	+
163	163	== 2.2 Downstream ==
164	164
165	165
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191	191	* **Frequency:** Transmit Frequency: example: 923300000
192	192	* **rxwindow:** transmit on Rx1Window or Rx2Window.
193	193
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		-
203	203	(% style="color:#037691" %)**Downstream Frequency**
204	204
205	205	The LG308 will use the RX2 window info to send the downstream payload, use the default LoRaWAN settings, as below:
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213	213	* IN865: 866.55Mhz, SF10 BW125
214	214	* RU864: 869.1Mhz, SF12 BW125
215	215
216		-
217		-
218	218	(% style="color:#037691" %)**Examples:**
219	219
220	220	(% class="box" %)
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221	221	(((
222	222	we can use echo command to create files in LG308 for downstream.
223	223	root@dragino-1d25dc:~~# echo 2602111D,time,hex,12345678 > /var/iot/push/test
	220	+)))
224	224
225		-
	222	+(% class="box" %)
	223	+(((
226	226	**1)** From logread -f of gateway, we can see it has been added as pedning.
227	227	lora_pkt_fwd[4286]: INFO~~ [DNLK]Looking file : test
228	228	lora_pkt_fwd[4286]: INFO~~ [DNLK]devaddr:2602111D, txmode:time, pdfm:hex, size:4, payload1:4Vx,payload_hex:77C1BB90
229	229	lora_pkt_fwd[4286]: INFO~~ [DNLK] DNLINK PENDING!(1 elems).
	228	+)))
230	230
231		-
	230	+(% class="box" %)
	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	+)))
235	235
236		-
	237	+(% class="box" %)
	238	+(((
237	237	**3)** and the end node will got:
238	238	[5764825]~*~*~*~** UpLinkCounter= 98 ~*~*~*~**
239	239	[5764827]TX on freq 905300000 Hz at DR 0
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246	246	Rssi= -41
247	247	Receive data
248	248	(% style="color:#037691" %)**2:12345678**  (%%) ~-~-> Hex
	251	+)))
249	249
250		-
	253	+(% class="box" %)
	254	+(((
251	251	**4) **If we use the command "echo 2602111D,time,txt,12345678 > /var/iot/push/test" for downstream, the end node will got:
252	252	[5955877]~*~*~*~** UpLinkCounter= 102 ~*~*~*~**
253	253	[5955879]TX on freq 904100000 Hz at DR 0