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Last modified by Xiaoling on 2025/04/27 16:45
From version 172.1
edited by Xiaoling
on 2022/06/15 09:51
Change comment: Uploaded new attachment "image-20220615095102-14.png", version {1}
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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300 300  
301 301  
302 302  
303 -(% style="color:blue" %)**Step 2**(%%): Power on LDDS75
303 +(% style="color:blue" %)**Step 2**(%%):  Power on LDDS20
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-20220610161724-10.png]]
308 +[[image:image-20220615095102-14.png]]
309 309  
310 310  
311 +
311 311  (((
312 -(% 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.
313 313  )))
314 314  
315 315  [[image:1654849068701-275.png]]
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320 320  
321 321  (((
322 322  (((
323 -LDDS75 will uplink payload via LoRaWAN with below payload format: 
324 -)))
324 +LDDS20 will uplink payload via LoRaWAN with below payload format:
325 325  
326 -(((
327 -Uplink payload includes in total 4 bytes.
328 -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).
329 329  )))
330 330  )))
331 331  
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352 352  === 2.3.1  Battery Info ===
353 353  
354 354  
355 -Check the battery voltage for LDDS75.
354 +Check the battery voltage for LDDS20.
356 356  
357 357  Ex1: 0x0B45 = 2885mV
358 358  
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363 363  === 2.3.2  Distance ===
364 364  
365 365  (((
366 -Get the distance. Flat object range 280mm - 7500mm.
365 +Get the distance. Flat object range 20mm - 2000mm.
367 367  )))
368 368  
369 369  (((
370 -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.**
371 371  )))
372 372  
373 373  
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374 374  * If the sensor value is 0x0000, it means system doesn’t detect ultrasonic sensor.
375 375  * 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.
376 376  
376 +
377 +
378 +
377 377  === 2.3.3  Interrupt Pin ===
378 378  
379 379  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.