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Last modified by Xiaoling on 2025/04/27 16:45
From version 172.6
edited by Xiaoling
on 2022/06/15 09:58
Change comment: There is no comment for this version
To version 170.6
edited by Xiaoling
on 2022/06/15 09:46
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 -
208 208  == 1.7  Precautions ==
209 209  
210 210  * 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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212 212  * 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.
213 213  
214 214  
215 -
216 -
217 217  == 1.8  Pin mapping and power on ==
218 218  
219 219  
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243 243  )))
244 244  
245 245  (((
246 -[[image:1655257698953-697.png]]
242 +[[image:1654848616367-242.png]]
247 247  )))
248 248  
249 249  (((
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253 253  (((
254 254  
255 255  
256 -(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS20.
252 +(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LDDS75.
257 257  )))
258 258  
259 259  (((
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.
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.
261 261  )))
262 262  
263 263  [[image:image-20220607170145-1.jpeg]]
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287 287  [[image:image-20220610161353-7.png]]
288 288  
289 289  
290 -
291 291  You can also choose to create the device manually.
292 292  
293 293   [[image:image-20220610161538-8.png]]
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300 300  
301 301  
302 302  
303 -(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
298 +(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
304 304  
305 305  
306 306  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
307 307  
308 -[[image:image-20220615095102-14.png]]
303 +[[image:image-20220610161724-10.png]]
309 309  
310 310  
311 -
312 312  (((
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.
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.
314 314  )))
315 315  
316 316  [[image:1654849068701-275.png]]
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321 321  
322 322  (((
323 323  (((
324 -LDDS20 will uplink payload via LoRaWAN with below payload format:
318 +LDDS75 will uplink payload via LoRaWAN with below payload format: 
319 +)))
325 325  
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).
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
328 328  )))
329 329  )))
330 330  
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351 351  === 2.3.1  Battery Info ===
352 352  
353 353  
354 -Check the battery voltage for LDDS20.
350 +Check the battery voltage for LDDS75.
355 355  
356 356  Ex1: 0x0B45 = 2885mV
357 357  
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362 362  === 2.3.2  Distance ===
363 363  
364 364  (((
365 -Get the distance. Flat object range 20mm - 2000mm.
361 +Get the distance. Flat object range 280mm - 7500mm.
366 366  )))
367 367  
368 368  (((
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.**
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.**
370 370  )))
371 371  
372 372  
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373 373  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
374 374  * 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.
375 375  
376 -
377 -
378 -
379 379  === 2.3.3  Interrupt Pin ===
380 380  
381 381  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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