Skip to Content
Last modified by Mengting Qiu on 2025/08/06 17:02
From version 170.1
edited by Xiaoling
on 2022/06/15 09:37
Change comment: Uploaded new attachment "1655257026882-201.png", version {1}
To version 173.1
edited by Xiaoling
on 2022/06/15 10:09
Change comment: Uploaded new attachment "image-20220615100930-15.png", version {1}

Summary

Details

Page properties
Content
... ... @@ -143,6 +143,7 @@
143 143  [[image:image-20220615092044-12.png]]
144 144  
145 145  
146 +
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  
175 +
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.
... ... @@ -201,23 +201,32 @@
201 201  
202 202  
203 203  
204 -== 1.6  Pin mapping and power on ==
205 +== 1.7  Precautions ==
205 205  
207 +* 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.
208 +* 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.
209 +* 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.
206 206  
207 -[[image:1654847583902-256.png]]
208 208  
209 209  
213 +== 1.8  Pin mapping and power on ==
210 210  
211 -= 2.  Configure LDDS75 to connect to LoRaWAN network =
212 212  
216 +[[image:1655257026882-201.png]]
217 +
218 +
219 +
220 += 2.  Configure LDDS20 to connect to LoRaWAN network =
221 +
222 +
213 213  == 2.1  How it works ==
214 214  
215 215  (((
216 -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
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 LDDS20. If there is coverage of the LoRaWAN network, it will automatically join the network via OTAA and start to send the sensor value.
217 217  )))
218 218  
219 219  (((
220 -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.
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.
221 221  )))
222 222  
223 223  
... ... @@ -229,7 +229,7 @@
229 229  )))
230 230  
231 231  (((
232 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
233 233  )))
234 234  
235 235  (((
... ... @@ -239,11 +239,11 @@
239 239  (((
240 240  
241 241  
242 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
252 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
243 243  )))
244 244  
245 245  (((
246 -Each LDDS75 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
256 +Each LDDS20 is shipped with a sticker with the default device keys, user can find this sticker in the box. it looks like below.
247 247  )))
248 248  
249 249  [[image:image-20220607170145-1.jpeg]]
... ... @@ -273,6 +273,7 @@
273 273  [[image:image-20220610161353-7.png]]
274 274  
275 275  
286 +
276 276  You can also choose to create the device manually.
277 277  
278 278   [[image:image-20220610161538-8.png]]
... ... @@ -285,16 +285,17 @@
285 285  
286 286  
287 287  
288 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
289 289  
290 290  
291 291  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
292 292  
293 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
294 294  
295 295  
307 +
296 296  (((
297 -(% 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.
309 +(% 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.
298 298  )))
299 299  
300 300  [[image:1654849068701-275.png]]
... ... @@ -305,12 +305,10 @@
305 305  
306 306  (((
307 307  (((
308 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
309 -)))
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
310 310  
311 -(((
312 -Uplink payload includes in total 4 bytes.
313 -Payload for firmware version v1.1.4. . Before v1.1.3, there is on two fields: BAT and Distance
322 +Uplink payload includes in total 8 bytes.
323 +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).
314 314  )))
315 315  )))
316 316  
... ... @@ -337,7 +337,7 @@
337 337  === 2.3.1  Battery Info ===
338 338  
339 339  
340 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
341 341  
342 342  Ex1: 0x0B45 = 2885mV
343 343  
... ... @@ -348,20 +348,21 @@
348 348  === 2.3.2  Distance ===
349 349  
350 350  (((
351 -Get the distance. Flat object range 280mm - 7500mm.
361 +Get the distance. Flat object range 20mm - 2000mm.
352 352  )))
353 353  
354 354  (((
355 -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.**
365 +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.**
356 356  )))
357 357  
368 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
369 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
358 358  
359 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
360 -* 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.
361 361  
372 +
362 362  === 2.3.3  Interrupt Pin ===
363 363  
364 -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.
375 +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.
365 365  
366 366  **Example:**
367 367  
... ... @@ -407,7 +407,7 @@
407 407  The payload decoder function for TTN V3 is here:
408 408  
409 409  (((
410 -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 +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/]]
411 411  )))
412 412  
413 413  
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