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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	167	)))
168	168
	170	+[[image:1654913911773-521.png]]
	171	+
	172	+
169	169	(((
170		-[[image:1654848616367-242.png]]
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171	171	)))
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173	173	(((
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175	175	)))
176	176
177	177	(((
178		-(% 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.
179	179	)))
180	180
181	181	(((
182		-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.
183	183	)))
184	184
185	185	[[image:image-20220607170145-1.jpeg]]
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206	206
207	207	[[image:image-20220610161353-7.png]]
208	208
	213	+**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
209	209
	215	+
	216	+
210	210	You can also choose to create the device manually.
211	211
212	212	[[image:image-20220610161538-8.png]]
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219	219
220	220
221	221
222		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
	229	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
223	223
224	224
225	225	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
226	226
227		-[[image:image-20220610161724-10.png]]
	234	+[[image:image-20220611102908-2.png]]
228	228
229	229
230	230	(((
231		-(% 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.
232	232	)))
233	233
234	234	[[image:1654849068701-275.png]]
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239	239
240	240	(((
241	241	(((
242		-LDDS75 will uplink payload via LoRaWAN with below payload format:
243		-)))
	249	+LDDS45 will uplink payload via LoRaWAN with below payload format:
244	244
245		-(((
246		-Uplink payload includes in total 4 bytes.
247		-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.
248	248	)))
249	249	)))
250	250
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271	271	=== 2.3.1  Battery Info ===
272	272
273	273
274		-Check the battery voltage for LDDS75.
	278	+Check the battery voltage for LDDS45.
275	275
276	276	Ex1: 0x0B45 = 2885mV
277	277
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282	282	=== 2.3.2  Distance ===
283	283
284	284	(((
285		-Get the distance. Flat object range 280mm - 7500mm.
	289	+Get the distance. Flat object range 30mm - 4500mm.
286	286	)))
287	287
288	288	(((
289		-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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