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Last modified by Xiaoling on 2025/04/27 16:45
From version 170.5
edited by Xiaoling
on 2022/06/15 09:46
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To version 147.5
edited by Xiaoling
on 2022/06/10 17:41
Change comment: There is no comment for this version

Summary

Details

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Title
... ... @@ -1,1 +1,1 @@
1 -LDDS20 - LoRaWAN Ultrasonic Liquid Level Sensor User Manual
1 +LDDS75 - LoRaWAN Distance Detection Sensor User Manual
Content
... ... @@ -1,97 +1,54 @@
1 1  (% style="text-align:center" %)
2 -[[image:1655254599445-662.png]]
2 +[[image:1654846127817-788.png]]
3 3  
4 +**Contents:**
4 4  
5 5  
6 6  
7 -**Table of Contents:**
8 8  
9 9  
10 10  
11 11  
12 12  
13 -
14 -
15 -
16 16  = 1.  Introduction =
17 17  
18 -== 1.1 ​ What is LoRaWAN Ultrasonic liquid level Sensor ==
15 +== 1.1 ​ What is LoRaWAN Distance Detection Sensor ==
19 19  
20 20  (((
21 21  
22 22  
23 23  (((
24 -(((
25 -(((
26 -The Dragino LDDS20 is a (% style="color:#4472c4" %)**LoRaWAN Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:#4472c4" %)**none-contact method **(%%)to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server
27 -)))
21 +The Dragino LDDS75 is a (% style="color:#4472c4" %)** LoRaWAN Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:#4472c4" %)** ultrasonic sensing** (%%)technology for distance measurement, and (% style="color:#4472c4" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
28 28  
29 -(((
30 -
31 -)))
32 32  
33 -(((
34 -The LDDS20 sensor is installed directly below the container to detect the height of the liquid level. User doesn’t need to open a hole on the container to be tested. The (% style="color:#4472c4" %)**none-contact measurement makes the measurement safety, easier and possible for some strict situation**. 
35 -)))
24 +It detects the distance** (% style="color:#4472c4" %) between the measured object and the sensor(%%)**, and uploads the value via wireless to LoRaWAN IoT Server.
36 36  
37 -(((
38 -
39 -)))
40 40  
41 -(((
42 -LDDS20 uses ultrasonic sensing technology for distance measurement. LDDS20 is of high accuracy to measure various liquid such as: (% style="color:#4472c4" %)**toxic substances**(%%), (% style="color:#4472c4" %)**strong acids**(%%), (% style="color:#4472c4" %)**strong alkalis**(%%) and (% style="color:#4472c4" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
43 -)))
27 +The LoRa wireless technology used in LDDS75 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
44 44  
45 -(((
46 -
47 -)))
48 48  
49 -(((
50 -The LoRa wireless technology used in LDDS20 allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.
51 -)))
30 +LDDS75 is powered by (% style="color:#4472c4" %)** 4000mA or 8500mAh Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
52 52  
53 -(((
54 -
55 -)))
56 56  
57 -(((
58 -LDDS20 is powered by (% style="color:#4472c4" %)**8500mA Li-SOCI2 battery**(%%); It is designed for long term use up to 10 years*.
59 -)))
33 +Each LDDS75 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
60 60  
61 -(((
62 -
63 -)))
64 64  
65 -(((
66 -Each LDDS20 pre-loads with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect if there is network coverage, after power on.
36 +(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors
67 67  )))
68 -
69 -(((
70 -
71 71  )))
72 -)))
73 73  
74 -(((
75 -(((
76 -(% style="color:#4472c4" %) * (%%)Actually lifetime depends on network coverage and uplink interval and other factors.
77 -)))
78 -)))
79 -)))
80 -)))
81 81  
41 +[[image:1654847051249-359.png]]
82 82  
83 -[[image:1655255122126-327.png]]
84 84  
85 85  
86 -
87 87  == ​1.2  Features ==
88 88  
89 89  * LoRaWAN 1.0.3 Class A
90 90  * Ultra low power consumption
91 -* Liquid Level Measurement by Ultrasonic technology
92 -* Measure through container, No need to contact Liquid.
93 -* Valid level range 20mm - 2000mm
94 -* Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
49 +* Distance Detection by Ultrasonic technology
50 +* Flat object range 280mm - 7500mm
51 +* Accuracy: ±(1cm+S*0.3%) (S: Distance)
95 95  * Cable Length : 25cm
96 96  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
97 97  * AT Commands to change parameters
... ... @@ -98,136 +98,65 @@
98 98  * Uplink on periodically
99 99  * Downlink to change configure
100 100  * IP66 Waterproof Enclosure
101 -* 8500mAh Battery for long term use
58 +* 4000mAh or 8500mAh Battery for long term use
102 102  
60 +== 1.3  Specification ==
103 103  
62 +=== 1.3.1  Rated environmental conditions ===
104 104  
64 +[[image:image-20220610154839-1.png]]
105 105  
106 -== 1.3  Suitable Container & Liquid ==
66 +**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);**
107 107  
108 -* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
109 -* Container shape is regular, and surface is smooth.
110 -* Container Thickness:
111 -** Pure metal material.  2~~8mm, best is 3~~5mm
112 -** Pure non metal material: <10 mm
113 -* Pure liquid without irregular deposition.
68 +**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)**
114 114  
115 115  
116 116  
117 -== 1.4  Mechanical ==
72 +=== 1.3.2  Effective measurement range Reference beam pattern ===
118 118  
119 -[[image:image-20220615090910-1.png]]
74 +**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
120 120  
121 121  
122 -[[image:image-20220615090910-2.png]]
123 123  
78 +[[image:1654852253176-749.png]]
124 124  
125 125  
126 -== 1.5  Install LDDS20 ==
81 +**(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
127 127  
128 128  
129 -(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
84 +[[image:1654852175653-550.png]](% style="display:none" %) ** **
130 130  
131 -LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
132 132  
133 -[[image:image-20220615091045-3.png]]
134 134  
88 +== 1.5 ​ Applications ==
135 135  
90 +* Horizontal distance measurement
91 +* Liquid level measurement
92 +* Parking management system
93 +* Object proximity and presence detection
94 +* Intelligent trash can management system
95 +* Robot obstacle avoidance
96 +* Automatic control
97 +* Sewer
98 +* Bottom water level monitoring
136 136  
137 -(% style="color:blue" %)**Step 2**(%%):  Polish the installation point.
100 +== 1.6  Pin mapping and power on ==
138 138  
139 -For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
140 140  
141 -[[image:image-20220615092010-11.png]]
103 +[[image:1654847583902-256.png]]
142 142  
143 143  
144 -No polish needed if the container is shine metal surface without paint or non-metal container.
145 145  
146 -[[image:image-20220615092044-12.png]]
107 += 2.  Configure LDDS75 to connect to LoRaWAN network =
147 147  
148 -
149 -(% style="color:blue" %)**Step3:   **(%%)Test the installation point.
150 -
151 -Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
152 -
153 -
154 -It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
155 -
156 -[[image:1655256160324-178.png]][[image:image-20220615092327-13.png]]
157 -
158 -
159 -After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
160 -
161 -
162 -(% style="color:red" %)**LED Status:**
163 -
164 -* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
165 -
166 -* (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
167 -* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
168 -
169 -LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
170 -
171 -
172 -(% style="color:red" %)**Note 2:**
173 -
174 -(% style="color:red" %)Ultrasonic coupling paste (%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
175 -
176 -
177 -(% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
178 -
179 -
180 -Prepare Eproxy AB glue.
181 -
182 -Put Eproxy AB glue in the sensor and press it hard on the container installation point.
183 -
184 -Reset LDDS20 and see if the BLUE LED is slowly blinking.
185 -
186 -[[image:image-20220615091045-8.png||height="226" width="380"]] [[image:image-20220615091045-9.png||height="239" width="339"]]
187 -
188 -
189 -(% style="color:red" %)**Note 1:**
190 -
191 -Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
192 -
193 -
194 -(% style="color:red" %)**Note 2:**
195 -
196 -(% style="color:red" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
197 -
198 -
199 -
200 -== 1.6 ​ Applications ==
201 -
202 -* Smart liquid control solution.
203 -* Smart liquefied gas solution.
204 -
205 -
206 -== 1.7  Precautions ==
207 -
208 -* At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
209 -* For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
210 -* When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
211 -
212 -
213 -== 1.8  Pin mapping and power on ==
214 -
215 -
216 -[[image:1655257026882-201.png]]
217 -
218 -
219 -
220 -= 2.  Configure LDDS20 to connect to LoRaWAN network =
221 -
222 -
223 223  == 2.1  How it works ==
224 224  
225 225  (((
226 -The LDDS20 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.
112 +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
227 227  )))
228 228  
229 229  (((
230 -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.A0UsingtheATCommands"]]to set the keys in the LDDS20.
116 +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.
231 231  )))
232 232  
233 233  
... ... @@ -247,8 +247,6 @@
247 247  )))
248 248  
249 249  (((
250 -
251 -
252 252  (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
253 253  )))
254 254  
... ... @@ -259,19 +259,11 @@
259 259  [[image:image-20220607170145-1.jpeg]]
260 260  
261 261  
262 -(((
263 263  For OTAA registration, we need to set **APP EUI/ APP KEY/ DEV EUI**. Some server might no need to set APP EUI.
264 -)))
265 265  
266 -(((
267 267  Enter these keys in the LoRaWAN Server portal. Below is TTN V3 screen shot:
268 -)))
269 269  
270 -(((
271 -
272 -
273 273  **Add APP EUI in the application**
274 -)))
275 275  
276 276  [[image:image-20220610161353-4.png]]
277 277  
... ... @@ -314,15 +314,11 @@
314 314  == 2.3  ​Uplink Payload ==
315 315  
316 316  (((
317 -(((
318 318  LDDS75 will uplink payload via LoRaWAN with below payload format: 
319 -)))
320 320  
321 -(((
322 322  Uplink payload includes in total 4 bytes.
323 323  Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
324 324  )))
325 -)))
326 326  
327 327  (((
328 328  
... ... @@ -333,12 +333,12 @@
333 333  **Size (bytes)**
334 334  )))|=(% style="width: 62.5px;" %)**2**|=**2**|=1|=2|=**1**
335 335  |(% style="width:62.5px" %)**Value**|(% style="width:62.5px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
336 -[[Distance>>||anchor="H2.3.2A0Distance"]]
208 +[[Distance>>||anchor="H2.3.3A0Distance"]]
337 337  
338 338  (unit: mm)
339 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
340 -[[Temperature (Optional )>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
341 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
211 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.4A0Distancesignalstrength"]]|(((
212 +[[Temperature (Optional )>>||anchor="H2.3.5A0InterruptPin"]]
213 +)))|[[Sensor Flag>>path:#Sensor_Flag]]
342 342  
343 343  [[image:1654850511545-399.png]]
344 344  
... ... @@ -357,13 +357,9 @@
357 357  
358 358  === 2.3.2  Distance ===
359 359  
360 -(((
361 361  Get the distance. Flat object range 280mm - 7500mm.
362 -)))
363 363  
364 -(((
365 365  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.**
366 -)))
367 367  
368 368  
369 369  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
... ... @@ -371,7 +371,7 @@
371 371  
372 372  === 2.3.3  Interrupt Pin ===
373 373  
374 -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.
242 +This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H4.2A0SetInterruptMode"]] for the hardware and software set up.
375 375  
376 376  **Example:**
377 377  
... ... @@ -397,18 +397,14 @@
397 397  
398 398  === 2.3.5  Sensor Flag ===
399 399  
400 -(((
401 401  0x01: Detect Ultrasonic Sensor
402 -)))
403 403  
404 -(((
405 405  0x00: No Ultrasonic Sensor
406 -)))
407 407  
408 408  
273 +===
274 +(% style="color:inherit; font-family:inherit" %)2.3.6  Decode payload in The Things Network(%%) ===
409 409  
410 -=== 2.3.6  Decode payload in The Things Network ===
411 -
412 412  While using TTN network, you can add the payload format to decode the payload.
413 413  
414 414  
... ... @@ -416,9 +416,7 @@
416 416  
417 417  The payload decoder function for TTN V3 is here:
418 418  
419 -(((
420 420  LDDS75 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS75/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
421 -)))
422 422  
423 423  
424 424  
... ... @@ -947,17 +947,10 @@
947 947  == 2.8  ​Firmware Change Log ==
948 948  
949 949  
950 -(((
951 951  **Firmware download link: **[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
952 -)))
953 953  
954 -(((
955 -
956 -)))
957 957  
958 -(((
959 959  **Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
960 -)))
961 961  
962 962  
963 963  
... ... @@ -966,11 +966,9 @@
966 966  
967 967  [[image:image-20220610172003-1.png]]
968 968  
969 -
970 970  [[image:image-20220610172003-2.png]]
971 971  
972 972  
973 -
974 974  == 2.10  Battery Analysis ==
975 975  
976 976  === 2.10.1  Battery Type ===
... ... @@ -981,7 +981,7 @@
981 981  The battery related documents as below:
982 982  
983 983  * (((
984 -[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
837 +[[ Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
985 985  )))
986 986  * (((
987 987  [[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
... ... @@ -997,7 +997,7 @@
997 997  === 2.10.2  Replace the battery ===
998 998  
999 999  (((
1000 -You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
853 +You can change the battery in the LDDS75.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
1001 1001  )))
1002 1002  
1003 1003  (((
... ... @@ -1005,12 +1005,12 @@
1005 1005  )))
1006 1006  
1007 1007  (((
1008 -The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
861 +The default battery pack of LDDS75 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
1009 1009  )))
1010 1010  
1011 1011  
1012 1012  
1013 -= 3.  Configure LDDS75 via AT Command or LoRaWAN Downlink =
866 += 3.  Configure LLDS12 via AT Command or LoRaWAN Downlink =
1014 1014  
1015 1015  (((
1016 1016  (((
... ... @@ -1020,7 +1020,7 @@
1020 1020  
1021 1021  * (((
1022 1022  (((
1023 -AT Command Connection: See [[FAQ>>||anchor="H4.A0FAQ"]].
876 +AT Command Connection: See [[FAQ>>||anchor="H7.A0FAQ"]].
1024 1024  )))
1025 1025  )))
1026 1026  * (((
... ... @@ -1101,9 +1101,7 @@
1101 1101  [[image:image-20220610172924-5.png]]
1102 1102  
1103 1103  
1104 -(((
1105 1105  In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LDDS75. LDDS75 will output system info once power on as below:
1106 -)))
1107 1107  
1108 1108  
1109 1109   [[image:image-20220610172924-6.png||height="601" width="860"]]
... ... @@ -1119,6 +1119,8 @@
1119 1119  [[image:image-20220610173409-7.png]]
1120 1120  
1121 1121  
973 +
974 +
1122 1122  (((
1123 1123  (% style="color:#037691" %)**Downlink Command: 0x01**
1124 1124  )))
... ... @@ -1127,26 +1127,24 @@
1127 1127  (((
1128 1128  Format: Command Code (0x01) followed by 3 bytes time value.
1129 1129  
1130 -(((
1131 1131  If the downlink payload=0100003C, it means set the END Node’s Transmit Interval to 0x00003C=60(S), while type code is 01.
1132 -)))
1133 1133  
1134 1134  * Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds
1135 1135  * Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds
1136 1136  )))
1137 -)))
1138 1138  
1139 1139  
990 +
991 +)))
1140 1140  
1141 -
1142 -
1143 1143  == 3.3  Set Interrupt Mode ==
1144 1144  
1145 1145  Feature, Set Interrupt mode for GPIO_EXIT.
1146 1146  
997 +
1147 1147  (% style="color:#037691" %)**Downlink Command: AT+INTMOD**
1148 1148  
1149 -[[image:image-20220610174917-9.png]]
1000 +[[image:image-20220610105907-1.png]]
1150 1150  
1151 1151  
1152 1152  (% style="color:#037691" %)**Downlink Command: 0x06**
... ... @@ -1153,78 +1153,207 @@
1153 1153  
1154 1154  Format: Command Code (0x06) followed by 3 bytes.
1155 1155  
1156 -(((
1157 1157  This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.
1158 -)))
1159 1159  
1160 1160  * Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode
1161 1161  * Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger
1162 1162  
1163 -= 4.  FAQ =
1164 1164  
1165 -== 4.1  What is the frequency plan for LDDS75? ==
1013 += 5.  Battery & How to replace =
1166 1166  
1167 -LDDS75 use the same frequency as other Dragino products. User can see the detail from this link:  [[Introduction>>doc:Main.End Device Frequency Band.WebHome||anchor="H1.Introduction"]]
1015 +== 5.1  Battery Type ==
1168 1168  
1017 +(((
1018 +LLDS12 is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.
1019 +)))
1169 1169  
1021 +(((
1022 +The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.
1023 +)))
1170 1170  
1171 -== 4.2  How to change the LoRa Frequency Bands/Region ==
1025 +[[image:1654593587246-335.png]]
1172 1172  
1173 -You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1174 -When downloading the images, choose the required image file for download. ​
1175 1175  
1028 +Minimum Working Voltage for the LLDS12:
1176 1176  
1030 +LLDS12:  2.45v ~~ 3.6v
1177 1177  
1178 -== 4.3  Can I use LDDS75 in condensation environment? ==
1179 1179  
1180 -LDDS75 is not suitable to be used in condensation environment. Condensation on the LDDS75 probe will affect the reading and always got 0.
1181 1181  
1034 +== 5.2  Replace Battery ==
1182 1182  
1036 +(((
1037 +Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.
1038 +)))
1183 1183  
1184 -= 5.  Trouble Shooting =
1040 +(((
1041 +And make sure the positive and negative pins match.
1042 +)))
1185 1185  
1186 -== 5.1  Why I can’t join TTN V3 in US915 / AU915 bands? ==
1187 1187  
1188 -It is due to channel mapping. Please see below link:  [[Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1189 1189  
1046 +== 5.3  Power Consumption Analyze ==
1190 1190  
1191 -== 5.2  AT Command input doesn't work ==
1048 +(((
1049 +Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
1050 +)))
1192 1192  
1052 +(((
1053 +Instruction to use as below:
1054 +)))
1055 +
1056 +
1057 +**Step 1**: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:
1058 +
1059 +[[https:~~/~~/www.dragino.com/downloads/index.pHp?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
1060 +
1061 +
1062 +**Step 2**: Open it and choose
1063 +
1064 +* Product Model
1065 +* Uplink Interval
1066 +* Working Mode
1067 +
1068 +And the Life expectation in difference case will be shown on the right.
1069 +
1070 +[[image:1654593605679-189.png]]
1071 +
1072 +
1073 +The battery related documents as below:
1074 +
1075 +* (((
1076 +[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
1077 +)))
1078 +* (((
1079 +[[Lithium-Thionyl Chloride Battery  datasheet>>url:https://www.dragino.com/downloads/downloads/datasheet/Battery/ER26500/ER26500_Datasheet-EN.pdf]],
1080 +)))
1081 +* (((
1082 +[[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]
1083 +)))
1084 +
1085 +[[image:image-20220607172042-11.png]]
1086 +
1087 +
1088 +
1089 +=== 5.3.1  ​Battery Note ===
1090 +
1091 +(((
1092 +The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
1093 +)))
1094 +
1095 +
1096 +
1097 +=== ​5.3.2  Replace the battery ===
1098 +
1099 +(((
1100 +You can change the battery in the LLDS12.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.
1101 +)))
1102 +
1103 +(((
1104 +The default battery pack of LLDS12 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)
1105 +)))
1106 +
1107 +
1108 +
1109 += 6.  Use AT Command =
1110 +
1111 +== 6.1  Access AT Commands ==
1112 +
1113 +LLDS12 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LLDS12 for using AT command, as below.
1114 +
1115 +[[image:1654593668970-604.png]]
1116 +
1117 +**Connection:**
1118 +
1119 +(% style="background-color:yellow" %)** USB TTL GND <~-~-~-~-> GND**
1120 +
1121 +(% style="background-color:yellow" %)** USB TTL TXD  <~-~-~-~-> UART_RXD**
1122 +
1123 +(% style="background-color:yellow" %)** USB TTL RXD  <~-~-~-~-> UART_TXD**
1124 +
1125 +
1126 +(((
1127 +(((
1128 +In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LLDS12.
1129 +)))
1130 +
1131 +(((
1132 +LLDS12 will output system info once power on as below:
1133 +)))
1134 +)))
1135 +
1136 +
1137 + [[image:1654593712276-618.png]]
1138 +
1139 +Valid AT Command please check [[Configure Device>>||anchor="H4.A0ConfigureLLDS12viaATCommandorLoRaWANDownlink"]].
1140 +
1141 +
1142 += 7.  FAQ =
1143 +
1144 +== 7.1  How to change the LoRa Frequency Bands/Region ==
1145 +
1146 +You can follow the instructions for [[how to upgrade image>>||anchor="H2.8A0200BFirmwareChangeLog"]].
1147 +When downloading the images, choose the required image file for download. ​
1148 +
1149 +
1150 += 8.  Trouble Shooting =
1151 +
1152 +== 8.1  AT Commands input doesn’t work ==
1153 +
1154 +
1155 +(((
1193 1193  In the case if user can see the console output but can’t type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn’t send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
1157 +)))
1194 1194  
1159 +
1160 +== 8.2  Significant error between the output distant value of LiDAR and actual distance ==
1161 +
1162 +
1195 1195  (((
1164 +(% style="color:blue" %)**Cause ①**(%%)**：**Due to the physical principles of The LiDAR probe, the above phenomenon is likely to occur if the detection object is the material with high reflectivity (such as mirror, smooth floor tile, etc.) or transparent substance (such as glass and water, etc.)
1165 +)))
1166 +
1167 +(((
1168 +Troubleshooting: Please avoid use of this product under such circumstance in practice.
1169 +)))
1170 +
1171 +(((
1196 1196  
1197 1197  )))
1198 1198  
1175 +(((
1176 +(% style="color:blue" %)**Cause ②**(%%)**: **The IR-pass filters are blocked.
1177 +)))
1199 1199  
1200 -= 6.  Order Info =
1179 +(((
1180 +Troubleshooting: please use dry dust-free cloth to gently remove the foreign matter.
1181 +)))
1201 1201  
1202 1202  
1203 -Part Number **:** (% style="color:blue" %)**LDDS75-XX-YY**
1204 1204  
1185 += 9.  Order Info =
1205 1205  
1206 -(% style="color:blue" %)**XX**(%%)**: **The default frequency band
1207 1207  
1208 -* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band
1209 -* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band
1210 -* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band
1211 -* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band
1212 -* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band
1213 -* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band
1214 -* (% style="color:red" %)**IN865 **(%%)**:**  LoRaWAN IN865 band
1215 -* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band
1188 +Part Number: (% style="color:blue" %)**LLDS12-XX**
1216 1216  
1217 -(% style="color:blue" %)**YY**(%%): Battery Option
1218 1218  
1219 -* (% style="color:red" %)**4 **(%%)**: **4000mAh battery
1220 -* (% style="color:red" %)**8 **(%%)**:** 8500mAh battery
1191 +(% style="color:blue" %)**XX**(%%): The default frequency band
1221 1221  
1222 -= 7. ​ Packing Info =
1193 +* (% style="color:red" %)**AS923**(%%):  LoRaWAN AS923 band
1194 +* (% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band
1195 +* (% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band
1196 +* (% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band
1197 +* (% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band
1198 +* (% style="color:red" %)**US915**(%%): LoRaWAN US915 band
1199 +* (% style="color:red" %)**IN865**(%%):  LoRaWAN IN865 band
1200 +* (% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band
1223 1223  
1202 += 10. ​ Packing Info =
1224 1224  
1204 +
1225 1225  **Package Includes**:
1226 1226  
1227 -* LDDS75 LoRaWAN Distance Detection Sensor x 1
1207 +* LLDS12 LoRaWAN LiDAR Distance Sensor x 1
1228 1228  
1229 1229  **Dimension and weight**:
1230 1230  
... ... @@ -1233,7 +1233,7 @@
1233 1233  * Package Size / pcs : cm
1234 1234  * Weight / pcs : g
1235 1235  
1236 -= 8.  ​Support =
1216 += 11.  ​Support =
1237 1237  
1238 1238  * 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.
1239 1239  * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].
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