Last modified by Bei Jinggeng on 2025/01/10 15:51
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From version < 43.42 >
edited by Xiaoling
on 2023/05/16 15:05
To version < 43.49 >
edited by Xiaoling
on 2023/05/16 15:49
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Summary

Details

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Content
... ... @@ -30,6 +30,7 @@
30 30  
31 31  == 1.2 ​Features ==
32 32  
33 +
33 33  * LoRaWAN 1.0.3 Class A
34 34  * Ultra-low power consumption
35 35  * Open-Source hardware/software
... ... @@ -295,7 +295,7 @@
295 295  In this mode, uplink payload includes in total 11 bytes. Uplink packets use FPORT=2.
296 296  
297 297  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
298 -|(% style="width:50px;background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="width:20px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:100px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:40px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:90px;background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="width:130px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:90px;background-color:#D9E2F3;color:#0070C0" %)**2**
299 +|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:130px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:90px" %)**2**
299 299  |**Value**|Bat|(% style="width:191px" %)(((
300 300  Temperature(DS18B20)(PC13)
301 301  )))|(% style="width:78px" %)(((
... ... @@ -311,12 +311,14 @@
311 311  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220627150949-6.png?rev=1.1||alt="image-20220627150949-6.png"]]
312 312  
313 313  
315 +
314 314  ==== 2.3.2.2  MOD~=2 (Distance Mode) ====
315 315  
318 +
316 316  This mode is target to measure the distance. The payload of this mode is totally 11 bytes. The 8^^th^^ and 9^^th^^ bytes is for the distance.
317 317  
318 318  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
319 -|(% style="width:40px;background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="width:40px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:110px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:40px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:110px;background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="width:140px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:40px;background-color:#D9E2F3;color:#0070C0" %)**2**
322 +|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:110px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:110px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:140px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:40px" %)**2**
320 320  |**Value**|BAT|(% style="width:196px" %)(((
321 321  Temperature(DS18B20)(PC13)
322 322  )))|(% style="width:87px" %)(((
... ... @@ -330,10 +330,12 @@
330 330  
331 331  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656324539647-568.png?rev=1.1||alt="1656324539647-568.png"]]
332 332  
336 +
333 333  (% style="color:blue" %)**Connection of LIDAR-Lite V3HP:**
334 334  
335 335  [[image:image-20230512173758-5.png||height="563" width="712"]]
336 336  
341 +
337 337  (% style="color:blue" %)**Connection to Ultrasonic Sensor:**
338 338  
339 339  Need to remove R1 and R2 resistors to get low power,otherwise there will be 240uA standby current.
... ... @@ -340,10 +340,11 @@
340 340  
341 341  [[image:image-20230512173903-6.png||height="596" width="715"]]
342 342  
348 +
343 343  For the connection to TF-Mini or TF-Luna , MOD2 payload is as below:
344 344  
345 345  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
346 -|(% style="width:50px;background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="width:20px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:100px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:100px;background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="width:50px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:120px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width:80px;background-color:#D9E2F3;color:#0070C0" %)**2**
352 +|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:120px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:80px" %)**2**
347 347  |**Value**|BAT|(% style="width:183px" %)(((
348 348  Temperature(DS18B20)(PC13)
349 349  )))|(% style="width:173px" %)(((
... ... @@ -358,6 +358,7 @@
358 358  
359 359  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656376779088-686.png?rev=1.1||alt="1656376779088-686.png"]]
360 360  
367 +
361 361  **Connection to [[TF-Mini plus>>url:http://en.benewake.com/product/detail/5c345cd0e5b3a844c472329b.html]] LiDAR(UART version):**
362 362  
363 363  Need to remove R3 and R4 resistors to get low power,otherwise there will be 400uA standby current.
... ... @@ -364,6 +364,7 @@
364 364  
365 365  [[image:image-20230512180609-7.png||height="555" width="802"]]
366 366  
374 +
367 367  **Connection to [[TF-Luna>>url:http://en.benewake.com/product/detail/5e1c1fd04d839408076b6255.html]] LiDAR (UART version):**
368 368  
369 369  Need to remove R3 and R4 resistors to get low power,otherwise there will be 400uA standby current.
... ... @@ -373,6 +373,7 @@
373 373  
374 374  ==== 2.3.2.3  MOD~=3 (3 ADC + I2C) ====
375 375  
384 +
376 376  This mode has total 12 bytes. Include 3 x ADC + 1x I2C
377 377  
378 378  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
... ... @@ -402,7 +402,7 @@
402 402  This mode has total 11 bytes. As shown below:
403 403  
404 404  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
405 -|(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|(% style="width: 20px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**2**|(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**2**
414 +|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**Size(bytes)**|(% style="background-color:#d9e2f3; color:#0070c0; width:20px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:50px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**1**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**2**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**2**
406 406  |**Value**|BAT|(% style="width:186px" %)(((
407 407  Temperature1(DS18B20)(PC13)
408 408  )))|(% style="width:82px" %)(((
... ... @@ -417,8 +417,10 @@
417 417  [[image:image-20230513134006-1.png||height="559" width="736"]]
418 418  
419 419  
429 +
420 420  ==== 2.3.2.5  MOD~=5(Weight Measurement by HX711) ====
421 421  
432 +
422 422  [[image:image-20230512164658-2.png||height="532" width="729"]]
423 423  
424 424  Each HX711 need to be calibrated before used. User need to do below two steps:
... ... @@ -454,8 +454,10 @@
454 454  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220820120036-2.png?width=1003&height=469&rev=1.1||alt="image-20220820120036-2.png" height="469" width="1003"]]
455 455  
456 456  
468 +
457 457  ==== 2.3.2.6  MOD~=6 (Counting Mode) ====
458 458  
471 +
459 459  In this mode, the device will work in counting mode. It counts the interrupt on the interrupt pins and sends the count on TDC time.
460 460  
461 461  Connection is as below. The PIR sensor is a count sensor, it will generate interrupt when people come close or go away. User can replace the PIR sensor with other counting sensors.
... ... @@ -462,7 +462,7 @@
462 462  
463 463  [[image:image-20230512181814-9.png||height="543" width="697"]]
464 464  
465 -(% style="color:red" %)**Note:** LoRaWAN wireless transmission will infect the PIR sensor. Which cause the counting value increase +1 for every uplink. User can change PIR sensor or put sensor away of the SN50_v3 to avoid this happen.
478 +(% style="color:red" %)**Note:** **LoRaWAN wireless transmission will infect the PIR sensor. Which cause the counting value increase +1 for every uplink. User can change PIR sensor or put sensor away of the SN50_v3 to avoid this happen.**
466 466  
467 467  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
468 468  |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**Size(bytes)**|=(% style="width: 20px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 220px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)**2**|=(% style="width: 100px;background-color:#D9E2F3;color:#0070C0" %)**1**|=(% style="width: 80px;background-color:#D9E2F3;color:#0070C0" %)**4**
... ... @@ -479,8 +479,10 @@
479 479  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656378441509-171.png?rev=1.1||alt="1656378441509-171.png"]]
480 480  
481 481  
495 +
482 482  ==== 2.3.2.7  MOD~=7 (Three interrupt contact modes) ====
483 483  
498 +
484 484  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
485 485  |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
486 486  **Size(bytes)**
... ... @@ -496,8 +496,10 @@
496 496  
497 497  [[image:image-20230513111203-7.png||height="324" width="975"]]
498 498  
514 +
499 499  ==== 2.3.2.8  MOD~=8 （3ADC+1DS18B20） ====
500 500  
517 +
501 501  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
502 502  |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
503 503  **Size(bytes)**
... ... @@ -520,6 +520,7 @@
520 520  
521 521  ==== 2.3.2.9  MOD~=9 (3DS18B20+ two Interrupt count mode) ====
522 522  
540 +
523 523  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:520px" %)
524 524  |=(% style="width: 50px;background-color:#D9E2F3;color:#0070C0" %)(((
525 525  **Size(bytes)**
... ... @@ -546,11 +546,11 @@
546 546  
547 547  (% style="color:blue" %)**The newly added AT command is issued correspondingly:**
548 548  
549 -(% style="color:#037691" %)**~ AT+INTMOD1 PA8**(%%)  pin：  Corresponding downlink:  (% style="color:#037691" %)**06 00 00 xx**
567 +(% style="color:#037691" %)** AT+INTMOD1 PA8**(%%)  pin：  Corresponding downlink:  (% style="color:#037691" %)**06 00 00 xx**
550 550  
551 -(% style="color:#037691" %)**~ AT+INTMOD2 PA4**(%%)  pin：  Corresponding downlink: (% style="color:#037691" %)**06 00 01 xx**
569 +(% style="color:#037691" %)** AT+INTMOD2 PA4**(%%)  pin：  Corresponding downlink: (% style="color:#037691" %)**06 00 01 xx**
552 552  
553 -(% style="color:#037691" %)**~ AT+INTMOD3 PB15**(%%)  pin：  Corresponding downlink:  (% style="color:#037691" %)** 06 00 02 xx**
571 +(% style="color:#037691" %)** AT+INTMOD3 PB15**(%%)  pin：  Corresponding downlink:  (% style="color:#037691" %)** 06 00 02 xx**
554 554  
555 555  
556 556  (% style="color:blue" %)**AT+SETCNT=aa,bb** 
... ... @@ -560,9 +560,9 @@
560 560  When AA is 2, set the count of PA4 pin to BB Corresponding downlink：09 02 bb bb bb bb
561 561  
562 562  
563 -
564 564  === 2.3.3  ​Decode payload ===
565 565  
583 +
566 566  While using TTN V3 network, you can add the payload format to decode the payload.
567 567  
568 568  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656378466788-734.png?rev=1.1||alt="1656378466788-734.png"]]
... ... @@ -574,6 +574,7 @@
574 574  
575 575  ==== 2.3.3.1 Battery Info ====
576 576  
595 +
577 577  Check the battery voltage for SN50v3.
578 578  
579 579  Ex1: 0x0B45 = 2885mV
... ... @@ -583,14 +583,16 @@
583 583  
584 584  ==== 2.3.3.2  Temperature (DS18B20) ====
585 585  
605 +
586 586  If there is a DS18B20 connected to PC13 pin. The temperature will be uploaded in the payload.
587 587  
588 -More DS18B20 can check the [[3 DS18B20 mode>>url:http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/#2.3.4MOD3D4283xDS18B2029]]
608 +More DS18B20 can check the [[3 DS18B20 mode>>||anchor="H2.3.2.4MOD3D4283xDS18B2029"]]
589 589  
590 590  (% style="color:blue" %)**Connection:**
591 591  
592 592  [[image:image-20230512180718-8.png||height="538" width="647"]]
593 593  
614 +
594 594  (% style="color:blue" %)**Example**:
595 595  
596 596  If payload is: 0105H:  (0105 & 8000 == 0), temp = 0105H /10 = 26.1 degree
... ... @@ -602,6 +602,7 @@
602 602  
603 603  ==== 2.3.3.3 Digital Input ====
604 604  
626 +
605 605  The digital input for pin PB15,
606 606  
607 607  * When PB15 is high, the bit 1 of payload byte 6 is 1.
... ... @@ -611,11 +611,14 @@
611 611  (((
612 612  When the digital interrupt pin is set to AT+INTMODx=0, this pin is used as a digital input pin.
613 613  
614 -(% style="color:red" %)**Note:**The maximum voltage input supports 3.6V.
636 +(% style="color:red" %)**Note: The maximum voltage input supports 3.6V.**
637 +
638 +
615 615  )))
616 616  
617 617  ==== 2.3.3.4  Analogue Digital Converter (ADC) ====
618 618  
643 +
619 619  The measuring range of the ADC is only about 0V to 1.1V The voltage resolution is about 0.24mv.
620 620  
621 621  When the measured output voltage of the sensor is not within the range of 0V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
... ... @@ -622,17 +622,19 @@
622 622  
623 623  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/WebHome/image-20220628150112-1.png?width=285&height=241&rev=1.1||alt="image-20220628150112-1.png" height="241" width="285"]]
624 624  
625 -(% style="color:red" %)**Note:**If the ADC type sensor needs to be powered by SN50_v3, it is recommended to use +5V to control its switch.Only sensors with low power consumption can be powered with VDD.
650 +(% style="color:red" %)**Note: If the ADC type sensor needs to be powered by SN50_v3, it is recommended to use +5V to control its switch.Only sensors with low power consumption can be powered with VDD.**
626 626  
627 627  
628 628  ==== 2.3.3.5 Digital Interrupt ====
629 629  
655 +
630 630  Digital Interrupt refers to pin PA8, and there are different trigger methods. When there is a trigger, the SN50v3 will send a packet to the server.
631 631  
632 -(% style="color:blue" %)**~ Interrupt connection method:**
658 +(% style="color:blue" %)** Interrupt connection method:**
633 633  
634 634  [[image:image-20230513105351-5.png||height="147" width="485"]]
635 635  
662 +
636 636  (% style="color:blue" %)**Example to use with door sensor :**
637 637  
638 638  The door sensor is shown at right. It is a two wire magnetic contact switch used for detecting the open/close status of doors or windows.
... ... @@ -641,8 +641,9 @@
641 641  
642 642  When the two pieces are close to each other, the 2 wire output will be short or open (depending on the type), while if the two pieces are away from each other, the 2 wire output will be the opposite status. So we can use SN50_v3 interrupt interface to detect the status for the door or window.
643 643  
644 -(% style="color:blue" %)**~ Below is the installation example:**
645 645  
672 +(% style="color:blue" %)**Below is the installation example:**
673 +
646 646  Fix one piece of the magnetic sensor to the door and connect the two pins to SN50_v3 as follows:
647 647  
648 648  * (((
... ... @@ -654,7 +654,7 @@
654 654  
655 655  Install the other piece to the door. Find a place where the two pieces will be close to each other when the door is closed. For this particular magnetic sensor, when the door is closed, the output will be short, and PA8 will be at the VCC voltage.
656 656  
657 -Door sensors have two types: ** NC (Normal close)** and **NO (normal open)**. The connection for both type sensors are the same. But the decoding for payload are reverse, user need to modify this in the IoT Server decoder.
685 +Door sensors have two types: (% style="color:blue" %)** NC (Normal close)**(%%) and (% style="color:blue" %)**NO (normal open)**(%%). The connection for both type sensors are the same. But the decoding for payload are reverse, user need to modify this in the IoT Server decoder.
658 658  
659 659  When door sensor is shorted, there will extra power consumption in the circuit, the extra current is 3v3/R14 = 3v3/1Mohm = 3uA which can be ignored.
660 660  
... ... @@ -666,12 +666,13 @@
666 666  
667 667  The command is:
668 668  
669 -(% style="color:blue" %)**AT+INTMOD1=1   ** (%%) ~/~/(more info about INMOD please refer** **[[**AT Command Manual**>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/&file=DRAGINO_LSN50_AT_Commands_v1.5.1.pdf]]**. **)
697 +(% style="color:blue" %)**AT+INTMOD1=1   ** (%%) ~/~/(more info about INMOD please refer** **[[**AT Command Manual**>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/&file=DRAGINO_LSN50_AT_Commands_v1.5.1.pdf]]**. **)
670 670  
671 671  Below shows some screen captures in TTN V3:
672 672  
673 673  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/1656379339508-835.png?rev=1.1||alt="1656379339508-835.png"]]
674 674  
703 +
675 675  In MOD=1, user can use byte 6 to see the status for door open or close. TTN V3 decoder is as below:
676 676  
677 677  door= (bytes[6] & 0x80)? "CLOSE":"OPEN";
... ... @@ -679,6 +679,7 @@
679 679  
680 680  ==== 2.3.3.6 I2C Interface (SHT20 & SHT31) ====
681 681  
711 +
682 682  The SDA and SCK are I2C interface lines. You can use these to connect to an I2C device and get the sensor data.
683 683  
684 684  We have made an example to show how to use the I2C interface to connect to the SHT20/ SHT31 Temperature and Humidity Sensor.
... ... @@ -707,22 +707,24 @@
707 707  
708 708  ==== 2.3.3.7  ​Distance Reading ====
709 709  
740 +
710 710  Refer [[Ultrasonic Sensor section>>||anchor="H2.3.3.8UltrasonicSensor"]].
711 711  
712 712  
713 713  ==== 2.3.3.8 Ultrasonic Sensor ====
714 714  
746 +
715 715  This Fundamental Principles of this sensor can be found at this link: [[https:~~/~~/wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU~~_~~__SEN0208>>url:https://wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU___SEN0208]]
716 716  
717 717  The SN50_v3 detects the pulse width of the sensor and converts it to mm output. The accuracy will be within 1 centimeter. The usable range (the distance between the ultrasonic probe and the measured object) is between 24cm and 600cm.
718 718  
719 -The working principle of this sensor is similar to the **HC-SR04** ultrasonic sensor.
751 +The working principle of this sensor is similar to the (% style="color:blue" %)**HC-SR04**(%%) ultrasonic sensor.
720 720  
721 721  The picture below shows the connection:
722 722  
723 723  [[image:image-20230512173903-6.png||height="596" width="715"]]
724 724  
725 -Connect to the SN50_v3 and run **AT+MOD=2** to switch to ultrasonic mode (ULT).
757 +Connect to the SN50_v3 and run (% style="color:blue" %)**AT+MOD=2**(%%) to switch to ultrasonic mode (ULT).
726 726  
727 727  The ultrasonic sensor uses the 8^^th^^ and 9^^th^^ byte for the measurement value.
728 728  
... ... @@ -778,8 +778,6 @@
778 778  * 7: MOD8
779 779  * 8: MOD9
780 780  
781 -
782 -
783 783  == 2.4 Payload Decoder file ==
784 784  
785 785  
... ... @@ -856,8 +856,6 @@
856 856  * Example 1: Downlink Payload: 0100001E  ~/~/  Set Transmit Interval (TDC) = 30 seconds
857 857  * Example 2: Downlink Payload: 0100003C  ~/~/  Set Transmit Interval (TDC) = 60 seconds
858 858  
859 -
860 -
861 861  === 3.3.2 Get Device Status ===
862 862  
863 863  Send a LoRaWAN downlink to ask the device to send its status.
... ... @@ -905,8 +905,6 @@
905 905  * Example 3: Downlink Payload: 06000102  **~-~-->**  AT+INTMOD2=2
906 906  * Example 4: Downlink Payload: 06000201  **~-~-->**  AT+INTMOD3=1
907 907  
908 -
909 -
910 910  === 3.3.4 Set Power Output Duration ===
911 911  
912 912  Control the output duration 5V . Before each sampling, device will
... ... @@ -938,8 +938,6 @@
938 938  * Example 1: Downlink Payload: 070000  **~-~-->**  AT+5VT=0
939 939  * Example 2: Downlink Payload: 0701F4  **~-~-->**  AT+5VT=500
940 940  
941 -
942 -
943 943  === 3.3.5 Set Weighing parameters ===
944 944  
945 945  Feature: Working mode 5 is effective, weight initialization and weight factor setting of HX711.
... ... @@ -964,8 +964,6 @@
964 964  * Example 2: Downlink Payload: 08020FA3  **~-~-->**  AT+WEIGAP=400.3
965 965  * Example 3: Downlink Payload: 08020FA0  **~-~-->**  AT+WEIGAP=400.0
966 966  
967 -
968 -
969 969  === 3.3.6 Set Digital pulse count value ===
970 970  
971 971  Feature: Set the pulse count value.
... ... @@ -988,8 +988,6 @@
988 988  * Example 1: Downlink Payload: 090100000000  **~-~-->**  AT+SETCNT=1,0
989 989  * Example 2: Downlink Payload: 0902000003E8  **~-~-->**  AT+SETCNT=2,1000
990 990  
991 -
992 -
993 993  === 3.3.7 Set Workmode ===
994 994  
995 995  Feature: Switch working mode.
... ... @@ -1013,8 +1013,6 @@
1013 1013  * Example 1: Downlink Payload: 0A01  **~-~-->**  AT+MOD=1
1014 1014  * Example 2: Downlink Payload: 0A04  **~-~-->**  AT+MOD=4
1015 1015  
1016 -
1017 -
1018 1018  = 4. Battery & Power Consumption =
1019 1019  
1020 1020  

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