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Last modified by Xiaoling on 2025/04/27 16:45
From version 170.6
edited by Xiaoling
on 2022/06/15 09:46
Change comment: There is no comment for this version
To version 172.6
edited by Xiaoling
on 2022/06/15 09:58
Change comment: There is no comment for this version

Summary

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203 203  * Smart liquefied gas solution.
204 204  
205 205  
206 +
207 +
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  
215 +
216 +
213 213  == 1.8  Pin mapping and power on ==
214 214  
215 215  
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239 239  )))
240 240  
241 241  (((
242 -[[image:1654848616367-242.png]]
246 +[[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.
256 +(% 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.
260 +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  
290 +
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
303 +(% 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]]
308 +[[image:image-20220615095102-14.png]]
304 304  
305 305  
311 +
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.
313 +(% 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 -)))
324 +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
326 +Uplink payload includes in total 8 bytes.
327 +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.
354 +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.
365 +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.**
369 +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  
368 368  
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369 369  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
370 370  * 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  
376 +
377 +
378 +
372 372  === 2.3.3  Interrupt Pin ===
373 373  
374 374  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.
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