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3	3
4	4	**Contents:**
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	6	+{{toc/}}
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148		-= 2.  Configure LDDS45 to connect to LoRaWAN network =
	149	+= 2.  Configure LDDS75 to connect to LoRaWAN network =
149	149
150	150	== 2.1  How it works ==
151	151
152	152	(((
153		-The LDDS45 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS45. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
	154	+The LDDS75 is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and power on the LDDS75. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value
154	154	)))
155	155
156	156	(((
157		-In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS45.
	158	+In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands >>||anchor="H3.A0ConfigureLDDS75viaATCommandorLoRaWANDownlink"]]to set the keys in the LDDS75.
158	158	)))
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163	163
164	164	(((
165	165	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.
166		-
167		-
168	168	)))
169	169
170		-[[image:1654913911773-521.png]]
171		-
172		-
173	173	(((
174		-
	170	+[[image:1654848616367-242.png]]
175	175	)))
176	176
177	177	(((
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179	179	)))
180	180
181	181	(((
182		-(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS45.
	178	+(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
183	183	)))
184	184
185	185	(((
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.
	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.
187	187	)))
188	188
189	189	[[image:image-20220607170145-1.jpeg]]
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210	210
211	211	[[image:image-20220610161353-7.png]]
212	212
213		-**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
214	214
215		-
216		-
217	217	You can also choose to create the device manually.
218	218
219	219	[[image:image-20220610161538-8.png]]
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226	226
227	227
228	228
229		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
	222	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
230	230
231	231
232	232	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
233	233
234		-[[image:image-20220611102908-2.png]]
	227	+[[image:image-20220610161724-10.png]]
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236	236
237	237	(((
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.
	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.
239	239	)))
240	240
241	241	[[image:1654849068701-275.png]]
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246	246
247	247	(((
248	248	(((
249		-LDDS45 will uplink payload via LoRaWAN with below payload format:
	242	+LDDS75 will uplink payload via LoRaWAN with below payload format:
	243	+)))
250	250
251		-Uplink payload includes in total 8 bytes.
	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
252	252	)))
253	253	)))
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275	275	=== 2.3.1  Battery Info ===
276	276
277	277
278		-Check the battery voltage for LDDS45.
	274	+Check the battery voltage for LDDS75.
279	279
280	280	Ex1: 0x0B45 = 2885mV
281	281
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286	286	=== 2.3.2  Distance ===
287	287
288	288	(((
289		-Get the distance. Flat object range 30mm - 4500mm.
	285	+Get the distance. Flat object range 280mm - 7500mm.
290	290	)))
291	291
292	292	(((
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.**
	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.**
294	294	)))
295	295
296	296
297	297	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
298		-* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
	294	+* If the sensor value lower than 0x0118 (280mm), the sensor value will be invalid. Since v1.1.4, all value lower than 280mm will be set to 0x0014(20mm) which means the value is invalid.
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300	300
301	301
302	302	=== 2.3.3  Interrupt Pin ===
303	303
304		-This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.3A0SetInterruptMode"]] for the hardware and software set up.
	300	+This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.3A0SetInterruptMode"]] for the hardware and software set up.
305	305
306	306	**Example:**
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