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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
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8	8
9	9
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164	164
165	165	(((
166	166	Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LG308>>url:http://www.dragino.com/products/lora/item/140-lg308.html]] as a LoRaWAN gateway in this example.
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167	167	)))
168	168
169	169	[[image:1654913911773-521.png]]
170	170
	172	+
171	171	(((
172	172
173	173	)))
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177	177	)))
178	178
179	179	(((
180		-(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
	182	+(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS45.
181	181	)))
182	182
183	183	(((
184		-Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
	186	+Each LDDS45 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
185	185	)))
186	186
187	187	[[image:image-20220607170145-1.jpeg]]
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208	208
209	209	[[image:image-20220610161353-7.png]]
210	210
	213	+**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
211	211
	215	+
	216	+
212	212	You can also choose to create the device manually.
213	213
214	214	[[image:image-20220610161538-8.png]]
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221	221
222	222
223	223
224		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
	229	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
225	225
226	226
227	227	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
228	228
229		-[[image:image-20220610161724-10.png]]
	234	+[[image:image-20220611102908-2.png]]
230	230
231	231
232	232	(((
233		-(% style="color:blue" %)**Step 3**(%%)**:** The LDDS75 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
	238	+(% style="color:blue" %)**Step 3**(%%)**:** The LDDS45 will auto join to the TTN network. After join success, it will start to upload messages to TTN and you can see the messages in the panel.
234	234	)))
235	235
236	236	[[image:1654849068701-275.png]]
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241	241
242	242	(((
243	243	(((
244		-LDDS75 will uplink payload via LoRaWAN with below payload format:
245		-)))
	249	+LDDS45 will uplink payload via LoRaWAN with below payload format:
246	246
247		-(((
248		-Uplink payload includes in total 4 bytes.
249		-Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
	251	+Uplink payload includes in total 8 bytes.
250	250	)))
251	251	)))
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273	273	=== 2.3.1  Battery Info ===
274	274
275	275
276		-Check the battery voltage for LDDS75.
	278	+Check the battery voltage for LDDS45.
277	277
278	278	Ex1: 0x0B45 = 2885mV
279	279
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284	284	=== 2.3.2  Distance ===
285	285
286	286	(((
287		-Get the distance. Flat object range 280mm - 7500mm.
	289	+Get the distance. Flat object range 30mm - 4500mm.
288	288	)))
289	289
290	290	(((
291		-For example, if the data you get from the register is 0x0B 0x05, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
	293	+For example, if the data you get from the register is __0x0B 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0B05(H) = 2821 (D) = 2821 mm.**
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