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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
7	7
8	8
9	9
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97	97
98	98	[[image:image-20220610154839-1.png]]
99	99
	99	+
100	100	(((
101		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
	101	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  **
	102	+
	103	+**~ b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
102	102	)))
103	103
104	104
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143	143
144	144
145	145
146		-= 2.  Configure LDDS75 to connect to LoRaWAN network =
	148	+= 2.  Configure LDDS45 to connect to LoRaWAN network =
147	147
148	148	== 2.1  How it works ==
149	149
150	150	(((
151		-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
	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
152	152	)))
153	153
154	154	(((
155		-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.
	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.
156	156	)))
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161	161
162	162	(((
163	163	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	+
164	164	)))
165	165
	170	+[[image:1654913911773-521.png]]
	171	+
	172	+
166	166	(((
167		-[[image:1654848616367-242.png]]
	174	+
168	168	)))
169	169
170	170	(((
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172	172	)))
173	173
174	174	(((
175		-(% 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.
176	176	)))
177	177
178	178	(((
179		-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.
180	180	)))
181	181
182	182	[[image:image-20220607170145-1.jpeg]]
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203	203
204	204	[[image:image-20220610161353-7.png]]
205	205
	213	+**Choose LDDS75 instead of LDDS45 is ok. They are of the same payload**
206	206
	215	+
	216	+
207	207	You can also choose to create the device manually.
208	208
209	209	[[image:image-20220610161538-8.png]]
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216	216
217	217
218	218
219		-(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
	229	+(% style="color:blue" %)**Step 2**(%%): Power on LDDS45
220	220
221	221
222	222	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
223	223
224		-[[image:image-20220610161724-10.png]]
	234	+[[image:image-20220611102908-2.png]]
225	225
226	226
227	227	(((
228		-(% 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.
229	229	)))
230	230
231	231	[[image:1654849068701-275.png]]
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236	236
237	237	(((
238	238	(((
239		-LDDS75 will uplink payload via LoRaWAN with below payload format:
240		-)))
	249	+LDDS45 will uplink payload via LoRaWAN with below payload format:
241	241
242		-(((
243		-Uplink payload includes in total 4 bytes.
244		-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.
245	245	)))
246	246	)))
247	247
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268	268	=== 2.3.1  Battery Info ===
269	269
270	270
271		-Check the battery voltage for LDDS75.
	278	+Check the battery voltage for LDDS45.
272	272
273	273	Ex1: 0x0B45 = 2885mV
274	274
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279	279	=== 2.3.2  Distance ===
280	280
281	281	(((
282		-Get the distance. Flat object range 280mm - 7500mm.
	289	+Get the distance. Flat object range 30mm - 4500mm.
283	283	)))
284	284
285	285	(((
286		-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.**
287	287	)))
288	288
289	289
290	290	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
291		-* 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.
	298	+* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
292	292
293	293
294	294
295	295	=== 2.3.3  Interrupt Pin ===
296	296
297		-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.
	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.
298	298
299	299	**Example:**
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