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Last modified by Xiaoling on 2025/04/27 16:45
From version 170.7
edited by Xiaoling
on 2022/06/15 09:47
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

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204 204  
205 205  
206 206  
207 +
207 207  == 1.7  Precautions ==
208 208  
209 209  * 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  
213 213  
214 214  
216 +
215 215  == 1.8  Pin mapping and power on ==
216 216  
217 217  
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241 241  )))
242 242  
243 243  (((
244 -[[image:1654848616367-242.png]]
246 +[[image:1655257698953-697.png]]
245 245  )))
246 246  
247 247  (((
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251 251  (((
252 252  
253 253  
254 -(% 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.
255 255  )))
256 256  
257 257  (((
258 -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.
259 259  )))
260 260  
261 261  [[image:image-20220607170145-1.jpeg]]
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285 285  [[image:image-20220610161353-7.png]]
286 286  
287 287  
290 +
288 288  You can also choose to create the device manually.
289 289  
290 290   [[image:image-20220610161538-8.png]]
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297 297  
298 298  
299 299  
300 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
303 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
301 301  
302 302  
303 303  Put a Jumper on JP2 to power on the device. ( The Switch must be in FLASH position).
304 304  
305 -[[image:image-20220610161724-10.png]]
308 +[[image:image-20220615095102-14.png]]
306 306  
307 307  
311 +
308 308  (((
309 -(% 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.
310 310  )))
311 311  
312 312  [[image:1654849068701-275.png]]
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317 317  
318 318  (((
319 319  (((
320 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
321 -)))
324 +LDDS20 will uplink payload via LoRaWAN with below payload format:
322 322  
323 -(((
324 -Uplink payload includes in total 4 bytes.
325 -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).
326 326  )))
327 327  )))
328 328  
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349 349  === 2.3.1  Battery Info ===
350 350  
351 351  
352 -Check the battery voltage for LDDS75.
354 +Check the battery voltage for LDDS20.
353 353  
354 354  Ex1: 0x0B45 = 2885mV
355 355  
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360 360  === 2.3.2  Distance ===
361 361  
362 362  (((
363 -Get the distance. Flat object range 280mm - 7500mm.
365 +Get the distance. Flat object range 20mm - 2000mm.
364 364  )))
365 365  
366 366  (((
367 -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.**
368 368  )))
369 369  
370 370  
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371 371  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
372 372  * 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.
373 373  
376 +
377 +
378 +
374 374  === 2.3.3  Interrupt Pin ===
375 375  
376 376  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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