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3	3
4	4	**Contents:**
5	5
6		-{{toc/}}
7	7
8	8
9	9
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90	90	* 8500mAh Battery for long term use
91	91
92	92
93		-
94	94	== 1.3  Specification ==
95	95
96	96	=== 1.3.1  Rated environmental conditions ===
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99	99
100	100
101	101	(((
102		-**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);  **
	100	+**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
103	103
104	104	**~ 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)**
105	105	)))
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138	138	* Bottom water level monitoring
139	139
140	140
141		-
142	142	== 1.6  Pin mapping and power on ==
143	143
144	144
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168	168
169	169	)))
170	170
171		-[[image:1654913911773-521.png]]
	168	+[[image:1654913911773-521.png]]
172	172
173	173
174	174	(((
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232	232
233	233	Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
234	234
235		-[[image:image-20220610161724-10.png]]
	232	+[[image:image-20220611102908-2.png]]
236	236
237	237
238	238	(((
239		-(% 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.
	236	+(% 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.
240	240	)))
241	241
242	242	[[image:1654849068701-275.png]]
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247	247
248	248	(((
249	249	(((
250		-LDDS75 will uplink payload via LoRaWAN with below payload format:
251		-)))
	247	+LDDS45 will uplink payload via LoRaWAN with below payload format:
252	252
253		-(((
254		-Uplink payload includes in total 4 bytes.
255		-Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
	249	+Uplink payload includes in total 8 bytes.
256	256	)))
257	257	)))
258	258
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279	279	=== 2.3.1  Battery Info ===
280	280
281	281
282		-Check the battery voltage for LDDS75.
	276	+Check the battery voltage for LDDS45.
283	283
284	284	Ex1: 0x0B45 = 2885mV
285	285
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290	290	=== 2.3.2  Distance ===
291	291
292	292	(((
293		-Get the distance. Flat object range 280mm - 7500mm.
	287	+Get the distance. Flat object range 30mm - 4500mm.
294	294	)))
295	295
296	296	(((
297		-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.**
	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.**
298	298	)))
299	299
300	300
301	301	* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
302		-* 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.
	296	+* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
303	303
304	304
305		-
306	306	=== 2.3.3  Interrupt Pin ===
307	307
308		-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.
	301	+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.
309	309
310	310	**Example:**
311	311
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325	325
326	326	If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
327	327
328		-(% style="color:red" %)Note: DS18B20 feature is supported in the hardware version > v1.3 which made since early of 2021.
329	329
330	330
331		-
332	332	=== 2.3.5  Sensor Flag ===
333	333
334	334	(((
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879	879	* Blink once when device transmit a packet.
880	880
881	881
882		-
883	883	== 2.8  ​Firmware Change Log ==
884	884
885	885
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1097	1097	* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1098	1098
1099	1099
1100		-
1101	1101	= 4.  FAQ =
1102	1102
1103	1103	== 4.1  What is the frequency plan for LDDS75? ==
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1158	1158	* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1159	1159
1160	1160
1161		-
1162	1162	= 7. ​ Packing Info =
1163	1163
1164	1164
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1174	1174	* Weight / pcs : g
1175	1175
1176	1176
1177		-
1178	1178	= 8.  ​Support =
1179	1179
1180	1180	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.

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