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Last modified by Mengting Qiu on 2025/08/06 17:02
From version 170.5
edited by Xiaoling
on 2022/06/15 09:46
Change comment: There is no comment for this version
To version 172.8
edited by Xiaoling
on 2022/06/15 10:04
Change comment: There is no comment for this version

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101 101  * 8500mAh Battery for long term use
102 102  
103 103  
104 -
105 -
106 106  == 1.3  Suitable Container & Liquid ==
107 107  
108 108  * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
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113 113  * Pure liquid without irregular deposition.
114 114  
115 115  
116 -
117 117  == 1.4  Mechanical ==
118 118  
119 119  [[image:image-20220615090910-1.png]]
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146 146  [[image:image-20220615092044-12.png]]
147 147  
148 148  
146 +
149 149  (% style="color:blue" %)**Step3:   **(%%)Test the installation point.
150 150  
151 151  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.
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174 174  (% 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.
175 175  
176 176  
175 +
177 177  (% style="color:blue" %)**Step4:   **(%%)Install use Epoxy ab glue.
178 178  
179 -
180 180  Prepare Eproxy AB glue.
181 181  
182 182  Put Eproxy AB glue in the sensor and press it hard on the container installation point.
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203 203  * Smart liquefied gas solution.
204 204  
205 205  
204 +
206 206  == 1.7  Precautions ==
207 207  
208 208  * 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.
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210 210  * 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.
211 211  
212 212  
212 +
213 213  == 1.8  Pin mapping and power on ==
214 214  
215 215  
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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.
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.
227 227  )))
228 228  
229 229  (((
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239 239  )))
240 240  
241 241  (((
242 -[[image:1654848616367-242.png]]
242 +[[image:1655257698953-697.png]]
243 243  )))
244 244  
245 245  (((
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249 249  (((
250 250  
251 251  
252 -(% 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.
253 253  )))
254 254  
255 255  (((
256 -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.
257 257  )))
258 258  
259 259  [[image:image-20220607170145-1.jpeg]]
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283 283  [[image:image-20220610161353-7.png]]
284 284  
285 285  
286 +
286 286  You can also choose to create the device manually.
287 287  
288 288   [[image:image-20220610161538-8.png]]
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295 295  
296 296  
297 297  
298 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
299 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
299 299  
300 300  
301 301  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
302 302  
303 -[[image:image-20220610161724-10.png]]
304 +[[image:image-20220615095102-14.png]]
304 304  
305 305  
307 +
306 306  (((
307 -(% 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.
308 308  )))
309 309  
310 310  [[image:1654849068701-275.png]]
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315 315  
316 316  (((
317 317  (((
318 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
319 -)))
320 +LDDS20 will uplink payload via LoRaWAN with below payload format: 
320 320  
321 -(((
322 -Uplink payload includes in total 4 bytes.
323 -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).
324 324  )))
325 325  )))
326 326  
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347 347  === 2.3.1  Battery Info ===
348 348  
349 349  
350 -Check the battery voltage for LDDS75.
350 +Check the battery voltage for LDDS20.
351 351  
352 352  Ex1: 0x0B45 = 2885mV
353 353  
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358 358  === 2.3.2  Distance ===
359 359  
360 360  (((
361 -Get the distance. Flat object range 280mm - 7500mm.
361 +Get the distance. Flat object range 20mm - 2000mm.
362 362  )))
363 363  
364 364  (((
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.**
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.**
366 366  )))
367 367  
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.
368 368  
369 -* If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
370 -* 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.
371 371  
372 +
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.
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.
375 375  
376 376  **Example:**
377 377  
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417 417  The payload decoder function for TTN V3 is here:
418 418  
419 419  (((
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 +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/]]
421 421  )))
422 422  
423 423  
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