Skip to Content
Last modified by Mengting Qiu on 2025/08/06 17:02
From version 170.2
edited by Xiaoling
on 2022/06/15 09:37
Change comment: There is no comment for this version
To version 173.4
edited by Xiaoling
on 2022/06/15 10:13
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -100,7 +100,6 @@
100 100  * IP66 Waterproof Enclosure
101 101  * 8500mAh Battery for long term use
102 102  
103 -
104 104  == 1.3  Suitable Container & Liquid ==
105 105  
106 106  * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
... ... @@ -110,7 +110,6 @@
110 110  ** Pure non metal material: <10 mm
111 111  * Pure liquid without irregular deposition.
112 112  
113 -
114 114  == 1.4  Mechanical ==
115 115  
116 116  [[image:image-20220615090910-1.png]]
... ... @@ -143,6 +143,7 @@
143 143  [[image:image-20220615092044-12.png]]
144 144  
145 145  
144 +
146 146  (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
147 147  
148 148  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.
... ... @@ -171,9 +171,9 @@
171 171  (% 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.
172 172  
173 173  
173 +
174 174  (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
175 175  
176 -
177 177  Prepare Eproxy AB glue.
178 178  
179 179  Put Eproxy AB glue in the sensor and press it hard on the container installation point.
... ... @@ -199,8 +199,6 @@
199 199  * Smart liquid control solution.
200 200  * Smart liquefied gas solution.
201 201  
202 -
203 -
204 204  == 1.7  Precautions ==
205 205  
206 206  * 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.
... ... @@ -207,25 +207,24 @@
207 207  * 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.
208 208  * 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.
209 209  
207 +== 1.8  Pin mapping and power on ==
210 210  
211 211  
212 -== 1.7  Pin mapping and power on ==
213 -
214 -
215 215  [[image:1655257026882-201.png]]
216 216  
217 217  
218 218  
219 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
214 += 2.  Configure LDDS20 to connect to LoRaWAN network =
220 220  
216 +
221 221  == 2.1  How it works ==
222 222  
223 223  (((
224 -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
220 +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 LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
225 225  )))
226 226  
227 227  (((
228 -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.
224 +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.
229 229  )))
230 230  
231 231  
... ... @@ -237,7 +237,7 @@
237 237  )))
238 238  
239 239  (((
240 -[[image:1654848616367-242.png]]
236 +[[image:1655257698953-697.png]]
241 241  )))
242 242  
243 243  (((
... ... @@ -247,11 +247,11 @@
247 247  (((
248 248  
249 249  
250 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
246 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
251 251  )))
252 252  
253 253  (((
254 -Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
250 +Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
255 255  )))
256 256  
257 257  [[image:image-20220607170145-1.jpeg]]
... ... @@ -281,6 +281,7 @@
281 281  [[image:image-20220610161353-7.png]]
282 282  
283 283  
280 +
284 284  You can also choose to create the device manually.
285 285  
286 286   [[image:image-20220610161538-8.png]]
... ... @@ -293,16 +293,17 @@
293 293  
294 294  
295 295  
296 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
293 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
297 297  
298 298  
299 299  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
300 300  
301 -[[image:image-20220610161724-10.png]]
298 +[[image:image-20220615095102-14.png]]
302 302  
303 303  
301 +
304 304  (((
305 -(% 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.
303 +(% style="color:blue" %)**Step 3**(%%)**:**  The LDDS20 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.
306 306  )))
307 307  
308 308  [[image:1654849068701-275.png]]
... ... @@ -313,12 +313,10 @@
313 313  
314 314  (((
315 315  (((
316 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
317 -)))
314 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
318 318  
319 -(((
320 -Uplink payload includes in total 4 bytes.
321 -Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
316 +Uplink payload includes in total 8 bytes.
317 +Payload for firmware version v1.1.4. . Before v1.1.3, there is only 5 bytes: BAT and Distance(Please check manual v1.2.0 if you have 5 bytes payload).
322 322  )))
323 323  )))
324 324  
... ... @@ -345,7 +345,7 @@
345 345  === 2.3.1  Battery Info ===
346 346  
347 347  
348 -Check the battery voltage for LDDS75.
344 +Check the battery voltage for LDDS20.
349 349  
350 350  Ex1: 0x0B45 = 2885mV
351 351  
... ... @@ -356,20 +356,19 @@
356 356  === 2.3.2  Distance ===
357 357  
358 358  (((
359 -Get the distance. Flat object range 280mm - 7500mm.
355 +Get the distance. Flat object range 20mm - 2000mm.
360 360  )))
361 361  
362 362  (((
363 -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.**
359 +For example, if the data you get from the register is __0x06 0x05__, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** 0605(H) = 1541 (D) = 1541 mm.**
364 364  )))
365 365  
362 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
363 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
366 366  
367 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
368 -* 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.
369 -
370 370  === 2.3.3  Interrupt Pin ===
371 371  
372 -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.
367 +This data field shows if this packet is generated by interrupt or not. [[Click here>>||anchor="H3.2A0SetInterruptMode"]] for the hardware and software set up.
373 373  
374 374  **Example:**
375 375  
... ... @@ -415,17 +415,41 @@
415 415  The payload decoder function for TTN V3 is here:
416 416  
417 417  (((
418 -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/]]
413 +LDDS20 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LDDS20/Payload_Decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Payload_Decoder/]]
419 419  )))
420 420  
421 421  
422 422  
423 -== 2.4  Uplink Interval ==
418 +== 2.4  Downlink Payload ==
424 424  
425 -The LDDS75 by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link: [[Change Uplink Interval>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H4.1ChangeUplinkInterval"]]
420 +By default, LDDS20 prints the downlink payload to console port.
426 426  
422 +[[image:image-20220615100930-15.png]]
427 427  
428 428  
425 +**Examples:**
426 +
427 +
428 +* (% style="color:blue" %)**Set TDC**
429 +
430 +If the payload=0100003C, it means set the END Node's TDC to 0x00003C=60(S), while type code is 01.
431 +
432 +Payload:    01 00 00 1E    TDC=30S
433 +
434 +Payload:    01 00 00 3C    TDC=60S
435 +
436 +
437 +* (% style="color:blue" %)**Reset**
438 +
439 +If payload = 0x04FF, it will reset the LDDS20
440 +
441 +
442 +* (% style="color:blue" %)**CFM**
443 +
444 +Downlink Payload: 05000001, Set AT+CFM=1 or 05000000 , set AT+CFM=0
445 +
446 +
447 +
429 429  == 2.5  ​Show Data in DataCake IoT Server ==
430 430  
431 431  (((
... ... @@ -453,7 +453,7 @@
453 453  
454 454  (% style="color:blue" %)**Step 3**(%%)**: Create an account or log in Datacake.**
455 455  
456 -(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.**
475 +(% style="color:blue" %)**Step 4**(%%)**: Search the LDDS75 and add DevEUI.(% style="color:red" %)(Note: LDDS20 use same payload as LDDS75)(%%)**
457 457  
458 458  [[image:1654851029373-510.png]]
459 459  
1655257698953-697.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.Xiaoling
Size
... ... @@ -1,0 +1,1 @@
1 +101.7 KB
Content
image-20220615095102-14.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.Xiaoling
Size
... ... @@ -1,0 +1,1 @@
1 +179.0 KB
Content
image-20220615100930-15.png
Author
... ... @@ -1,0 +1,1 @@
1 +XWiki.Xiaoling
Size
... ... @@ -1,0 +1,1 @@
1 +10.5 KB
Content