Last modified by Bei Jinggeng on 2025/01/10 15:51
<
From version < 14.1 >
edited by Edwin Chen
on 2023/05/11 23:21
To version < 12.1 >
edited by Edwin Chen
on 2023/05/11 23:06
>
Change comment: There is no comment for this version

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... ... @@ -282,14 +282,17 @@
282 282   **AT+MOD=2  ** ~/~/ will set the SN50v3 to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.
283 283  
284 284  
285 -(% style="color:red" %) **Important Notice:**
285 +(% style="color:red" %) **Important Notice:** (%%)
286 286  
287 287  1. Some working modes has payload more than 12 bytes, The US915/AU915/AS923 frequency bands' definition has maximum 11 bytes in **DR0**. Server sides will see NULL payload while SN50v3 transmit in DR0 with 12 bytes payload.
288 -1. All modes share the same Payload Explanation from HERE.
289 -1. By default, the device will send an uplink message every 20 minutes.
290 290  
291 -==== 2.3.2.1  MOD~=1 (Default Mode) ====
289 +2. All modes share the same Payload Explanation from HERE.
292 292  
291 +3. By default, the device will send an uplink message every 20 minutes.
292 +
293 +
294 +=== 2.3.1  MOD~=1 (Default Mode) ===
295 +
293 293  In this mode, uplink payload includes in total 11 bytes. Uplink packets use FPORT=2.
294 294  
295 295  |**Size(bytes)**|**2**|**2**|**2**|**1**|**2**|**2**
... ... @@ -297,9 +297,8 @@
297 297  
298 298  [[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"]]
299 299  
303 +=== 2.3.2 MOD~=2 (Distance Mode) ===
300 300  
301 -==== 2.3.2.2  MOD~=2 (Distance Mode) ====
302 -
303 303  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.
304 304  
305 305  |**Size(bytes)**|**2**|**2**|**2**|**1**|**2**|**2**
... ... @@ -349,9 +349,8 @@
349 349  
350 350  Please use firmware version > 1.6.5 when use MOD=2, in this firmware version, user can use LSn50 v1 to power the ultrasonic sensor directly and with low power consumption.
351 351  
354 +=== 2.3.3 MOD~=3 (3 ADC + I2C) ===
352 352  
353 -==== 2.3.2.3  MOD~=3 (3 ADC + I2C) ====
354 -
355 355  This mode has total 12 bytes. Include 3 x ADC + 1x I2C
356 356  
357 357  |=(((
... ... @@ -363,9 +363,8 @@
363 363  
364 364  [[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/1656377431497-975.png?rev=1.1||alt="1656377431497-975.png"]]
365 365  
367 +=== 2.3.4 MOD~=4 (3 x DS18B20) ===
366 366  
367 -==== 2.3.2.4 MOD~=4 (3 x DS18B20) ====
368 -
369 369  This mode is supported in firmware version since v1.6.1. Software set to AT+MOD=4
370 370  
371 371  Hardware connection is as below,
... ... @@ -394,9 +394,8 @@
394 394  
395 395  [[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/1656377606181-607.png?rev=1.1||alt="1656377606181-607.png"]]
396 396  
397 +=== 2.3.5 MOD~=5(Weight Measurement by HX711) ===
397 397  
398 -==== 2.3.2.5  MOD~=5(Weight Measurement by HX711) ====
399 -
400 400  This mode is supported in firmware version since v1.6.2. Please use v1.6.5 firmware version so user no need to use extra LDO for connection.
401 401  
402 402  
... ... @@ -425,9 +425,8 @@
425 425  
426 426  [[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"]]
427 427  
427 +=== 2.3.6 MOD~=6 (Counting Mode, Since firmware v1.6.5) ===
428 428  
429 -==== 2.3.2.6  MOD~=6 (Counting Mode) ====
430 -
431 431  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.
432 432  
433 433  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.
... ... @@ -443,9 +443,8 @@
443 443  
444 444  [[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"]]
445 445  
444 +=== 2.3.7  MOD~=7 Three interrupt contact modes (the hardware version needs to support three interrupt versions, Since firmware v1.8.0) ===
446 446  
447 -==== 2.3.2.7  MOD~=7 (Three interrupt contact modes) ====
448 -
449 449  [[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-20220820140109-3.png?rev=1.1||alt="image-20220820140109-3.png"]]
450 450  
451 451  |=(((
... ... @@ -455,7 +455,7 @@
455 455  Digital in(PA12)&Digital Interrupt1(PB14)
456 456  )))|Digital Interrupt2(PB15)|Digital Interrupt3(PA4)|Reserved
457 457  
458 -==== 2.3.2.8  MOD~=8 （3ADC+1DS18B20） ====
455 +=== 2.3.8  MOD~=8 （3ADC+1DS18B20, Since firmware v1.8.0） ===
459 459  
460 460  |=(((
461 461  **Size(bytes)**
... ... @@ -473,9 +473,8 @@
473 473  
474 474  [[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-20220823164903-2.png?rev=1.1||alt="image-20220823164903-2.png"]]
475 475  
473 +=== 2.3.9  MOD~=9 3DS18B20+ two Interrupt count mode (the hardware version needs to support 3 interrupt versions, Since firmware v1.8.0) ===
476 476  
477 -==== 2.3.2.9  MOD~=9 (3DS18B20+ two Interrupt count mode) ====
478 -
479 479  |=(((
480 480  **Size(bytes)**
481 481  )))|=**2**|=**2**|=**2**|=**1**|=**2**|=4|=4
... ... @@ -502,7 +502,7 @@
502 502  
503 503  **~ AT+INTMOD2**  **PB15** pin：  Corresponding downlink:**  06 00 01 xx**
504 504  
505 -**~ AT+INTMOD3**  **PA4**  pin：  Corresponding downlink:  ** 06 00 02 xx**
501 +**~ AT+INTMOD3**  **PA4**  pin：  Corresponding downlink:  ** 06 00 02 xx**
506 506  
507 507  **AT+SETCNT=aa,bb** 
508 508  
... ... @@ -510,10 +510,8 @@
510 510  
511 511  When AA is 2, set the count of PB15 pin to BB Corresponding downlink：09 02 bb bb bb bb
512 512  
509 +=== 2.3.10  ​Decode payload in The Things Network ===
513 513  
514 -
515 -=== 2.3.3  ​Decode payload ===
516 -
517 517  While using TTN V3 network, you can add the payload format to decode the payload.
518 518  
519 519  [[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"]]
... ... @@ -520,28 +520,39 @@
520 520  
521 521  The payload decoder function for TTN V3 are here:
522 522  
523 -SN50v3 TTN V3 Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>url:https://github.com/dragino/dragino-end-node-decoder]]
517 +LSN50 TTN V3 Payload Decoder:  [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>url:https://github.com/dragino/dragino-end-node-decoder]]
524 524  
525 525  
526 -==== 2.3.3.1 Battery Info ====
520 +Sensor Data is uplink via FPORT=2
527 527  
528 -Check the battery voltage for SN50v3.
522 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %)
523 +|=(% style="width: 90px;background-color:#D9E2F3" %)(((
524 +**Size(bytes)**
525 +)))|=(% style="width: 80px;background-color:#D9E2F3" %)2|=(% style="width: 90px;background-color:#D9E2F3" %)4|=(% style="width:80px;background-color:#D9E2F3" %)1|=(% style="width: 80px;background-color:#D9E2F3" %)**2**|=(% style="width: 80px;background-color:#D9E2F3" %)2
526 +|(% style="width:99px" %)**Value**|(% style="width:69px" %)(((
527 +[[Battery>>||anchor="HBattery:"]]
528 +)))|(% style="width:130px" %)(((
529 +[[Unix TimeStamp>>||anchor="H2.5.2UnixTimeStamp"]]
530 +)))|(% style="width:91px" %)(((
531 +[[Alarm Flag>>||anchor="HAlarmFlag26MOD:"]]
532 +)))|(% style="width:103px" %)(((
533 +[[Temperature>>||anchor="HTemperature:"]]
534 +)))|(% style="width:80px" %)(((
535 +[[Humidity>>||anchor="HHumidity:"]]
536 +)))
529 529  
538 +==== (% style="color:#4472c4" %)**Battery**(%%) ====
539 +
540 +Sensor Battery Level.
541 +
530 530  Ex1: 0x0B45 = 2885mV
531 531  
532 532  Ex2: 0x0B49 = 2889mV
533 533  
534 534  
535 -==== 2.3.3.2  Temperature (DS18B20) ====
536 536  
537 -If there is a DS18B20 connected to PB3 pin. The temperature will be uploaded in the payload.
548 +==== (% style="color:#4472c4" %)**Temperature**(%%) ====
538 538  
539 -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]]
540 -
541 -**Connection:**
542 -
543 -[[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/1656378573379-646.png?rev=1.1||alt="1656378573379-646.png"]]
544 -
545 545  **Example**:
546 546  
547 547  If payload is: 0105H:  (0105 & 8000 == 0), temp = 0105H /10 = 26.1 degree
... ... @@ -551,224 +551,26 @@
551 551  （FF3F & 8000：Judge whether the highest bit is 1, when the highest bit is 1, it is negative）
552 552  
553 553  
554 -==== 2.3.3.3 Digital Input ====
559 +==== (% style="color:#4472c4" %)**Humidity**(%%) ====
555 555  
556 -The digital input for pin PA12,
557 557  
558 -* When PA12 is high, the bit 1 of payload byte 6 is 1.
559 -* When PA12 is low, the bit 1 of payload byte 6 is 0.
562 +Read:0x(0197)=412    Value:  412 / 10=41.2, So 41.2%
560 560  
561 561  
562 -==== 2.3.3.4  Analogue Digital Converter (ADC) ====
565 +==== (% style="color:#4472c4" %)**Alarm Flag& MOD**(%%) ====
563 563  
564 -The ADC pins in LSN50 can measure range from 0~~Vbat, it use reference voltage from . If user need to measure a voltage > VBat, please use resistors to divide this voltage to lower than VBat, otherwise, it may destroy the ADC pin.
565 565  
566 -Note: minimum VBat is 2.5v, when batrrey lower than this value. Device won't be able to send LoRa Uplink.
567 -
568 -The ADC monitors the voltage on the PA0 line, in mV.
569 -
570 -Ex: 0x021F = 543mv,
571 -
572 -**~ Example1:**  Reading an Oil Sensor (Read a resistance value):
573 -
574 -
575 -[[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-20220627172409-28.png?rev=1.1||alt="image-20220627172409-28.png"]]
576 -
577 -In the LSN50, we can use PB4 and PA0 pin to calculate the resistance for the oil sensor.
578 -
579 -
580 -**Steps:**
581 -
582 -1. Solder a 10K resistor between PA0 and VCC.
583 -1. Screw oil sensor's two pins to PA0 and PB4.
584 -
585 -The equipment circuit is as below:
586 -
587 -[[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-20220627172500-29.png?rev=1.1||alt="image-20220627172500-29.png"]]
588 -
589 -According to above diagram:
590 -
591 -[[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-20220628091043-4.png?rev=1.1||alt="image-20220628091043-4.png"]]
592 -
593 -So
594 -
595 -[[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-20220628091344-6.png?rev=1.1||alt="image-20220628091344-6.png"]]
596 -
597 -[[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-20220628091621-8.png?rev=1.1||alt="image-20220628091621-8.png"]] is the reading of ADC. So if ADC=0x05DC=0.9 v and VCC (BAT) is 2.9v
598 -
599 -The [[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-20220628091702-9.png?rev=1.1||alt="image-20220628091702-9.png"]] 4.5K ohm
600 -
601 -Since the Bouy is linear resistance from 10 ~~ 70cm.
602 -
603 -The position of Bouy is [[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-20220628091824-10.png?rev=1.1||alt="image-20220628091824-10.png"]] , from the bottom of Bouy.
604 -
605 -
606 -==== 2.3.3.5 Digital Interrupt ====
607 -
608 -Digital Interrupt refers to pin PB14, and there are different trigger methods. When there is a trigger, the SN50v3 will send a packet to the server.
609 -
610 -**~ Interrupt connection method:**
611 -
612 -[[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/1656379178634-321.png?rev=1.1||alt="1656379178634-321.png"]]
613 -
614 -**Example to use with door sensor :**
615 -
616 -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.
617 -
618 -[[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/1656379210849-860.png?rev=1.1||alt="1656379210849-860.png"]]
619 -
620 -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 LSN50 interrupt interface to detect the status for the door or window.
621 -
622 -**~ Below is the installation example:**
623 -
624 -Fix one piece of the magnetic sensor to the door and connect the two pins to LSN50 as follows:
625 -
626 -* (((
627 -One pin to LSN50's PB14 pin
628 -)))
629 -* (((
630 -The other pin to LSN50's VCC pin
631 -)))
632 -
633 -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 PB14 will be at the VCC voltage.
634 -
635 -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.
636 -
637 -When door sensor is shorted, there will extra power consumption in the circuit, the extra current is 3v3/R14 = 3v2/1Mohm = 0.3uA which can be ignored.
638 -
639 -[[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/1656379283019-229.png?rev=1.1||alt="1656379283019-229.png"]]
640 -
641 -The above photos shows the two parts of the magnetic switch fitted to a door.
642 -
643 -The software by default uses the falling edge on the signal line as an interrupt. We need to modify it to accept both the rising edge (0v ~-~-> VCC , door close) and the falling edge (VCC ~-~-> 0v , door open) as the interrupt.
644 -
645 -The command is:
646 -
647 -**AT+INTMOD=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]]**. **)
648 -
649 -Below shows some screen captures in TTN V3:
650 -
651 -[[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"]]
652 -
653 -In MOD=1, user can use byte 6 to see the status for door open or close. TTN V3 decoder is as below:
654 -
655 -door= (bytes[6] & 0x80)? "CLOSE":"OPEN";
656 -
657 -**Notice for hardware version LSN50 v1 < v1.3** (produced before 2018-Nov).
658 -
659 -In this hardware version, there is no R14 resistance solder. When use the latest firmware, it should set AT+INTMOD=0 to close the interrupt. If user need to use Interrupt in this hardware version, user need to solder R14 with 10M resistor and C1 (0.1uF) on board.
660 -
661 -[[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/1656379563303-771.png?rev=1.1||alt="1656379563303-771.png"]]
662 -
663 -
664 -==== 2.3.3.6 I2C Interface (SHT20) ====
665 -
666 -The PB6(SDA) and PB7(SCK) are I2C interface lines. You can use these to connect to an I2C device and get the sensor data.
667 -
668 -We have made an example to show how to use the I2C interface to connect to the SHT20 Temperature and Humidity Sensor. This is supported in the stock firmware since v1.5 with **AT+MOD=1 (default value).**
669 -
670 -Notice: Different I2C sensors have different I2C commands set and initiate process, if user want to use other I2C sensors, User need to re-write the source code to support those sensors. SHT20 code in LSN50 will be a good reference.
671 -
672 -Below is the connection to SHT20/ SHT31. The connection is as below:
673 -
674 -[[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-20220902163605-2.png?rev=1.1||alt="image-20220902163605-2.png"]]
675 -
676 -The device will be able to get the I2C sensor data now and upload to IoT Server.
677 -
678 -[[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/1656379664142-345.png?rev=1.1||alt="1656379664142-345.png"]]
679 -
680 -Convert the read byte to decimal and divide it by ten.
681 -
682 682  **Example:**
683 683  
684 -Temperature:  Read:0116(H) = 278(D)  Value:  278 /10=27.8℃;
570 +If payload & 0x01 = 0x01  **~-~->** This is an Alarm Message
685 685  
686 -Humidity:    Read:0248(H)=584(D)  Value:  584 / 10=58.4, So 58.4%
572 +If payload & 0x01 = 0x00  **~-~->** This is a normal uplink message, no alarm
687 687  
688 -If you want to use other I2C device, please refer the SHT20 part source code as reference.
574 +If payload >> 2 = 0x00  **~-~->**  means MOD=1, This is a sampling uplink message
689 689  
576 +If payload >> 2 = 0x31  **~-~->**  means MOD=31, this message is a reply message for polling, this message contains the alarm settings. see [[this link>>path:#HPolltheAlarmsettings:]] for detail. 
690 690  
691 -==== 2.3.3.7  ​Distance Reading ====
692 692  
693 -Refer [[Ultrasonic Sensor section>>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/#H2.4.8UltrasonicSensor]].
694 -
695 -
696 -==== 2.3.3.8 Ultrasonic Sensor ====
697 -
698 -The LSN50 v1.5 firmware supports ultrasonic sensor (with AT+MOD=2) such as SEN0208 from DF-Robot. 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]]
699 -
700 -The LSN50 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.
701 -
702 -The picture below shows the connection:
703 -
704 -[[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/1656380061365-178.png?rev=1.1||alt="1656380061365-178.png"]]
705 -
706 -Connect to the LSN50 and run **AT+MOD=2** to switch to ultrasonic mode (ULT).
707 -
708 -The ultrasonic sensor uses the 8^^th^^ and 9^^th^^ byte for the measurement value.
709 -
710 -**Example:**
711 -
712 -Distance:  Read: 0C2D(Hex) = 3117(D)  Value:  3117 mm=311.7 cm
713 -
714 -[[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/1656384895430-327.png?rev=1.1||alt="1656384895430-327.png"]]
715 -
716 -[[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/1656384913616-455.png?rev=1.1||alt="1656384913616-455.png"]]
717 -
718 -You can see the serial output in ULT mode as below:
719 -
720 -[[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/1656384939855-223.png?rev=1.1||alt="1656384939855-223.png"]]
721 -
722 -**In TTN V3 server:**
723 -
724 -[[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/1656384961830-307.png?rev=1.1||alt="1656384961830-307.png"]]
725 -
726 -[[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/1656384973646-598.png?rev=1.1||alt="1656384973646-598.png"]]
727 -
728 -==== 2.3.3.9  Battery Output - BAT pin ====
729 -
730 -The BAT pin of SN50v3 is connected to the Battery directly. If users want to use BAT pin to power an external sensor. User need to make sure the external sensor is of low power consumption. Because the BAT pin is always open. If the external sensor is of high power consumption. the battery of SN50v3-LB will run out very soon.
731 -
732 -
733 -==== 2.3.3.10  +5V Output ====
734 -
735 -SN50v3 will enable +5V output before all sampling and disable the +5v after all sampling. 
736 -
737 -The 5V output time can be controlled by AT Command.
738 -
739 -**AT+5VT=1000**
740 -
741 -Means set 5V valid time to have 1000ms. So the real 5V output will actually have 1000ms + sampling time for other sensors.
742 -
743 -By default the AT+5VT=500. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.
744 -
745 -
746 -
747 -==== 2.3.3.11  BH1750 Illumination Sensor ====
748 -
749 -MOD=1 support this sensor. The sensor value is in the 8^^th^^ and 9^^th^^ bytes.
750 -
751 -[[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-20220628110012-11.jpeg?rev=1.1||alt="image-20220628110012-11.jpeg"]]
752 -
753 -[[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-20220628110012-12.png?rev=1.1||alt="image-20220628110012-12.png"]]
754 -
755 -
756 -==== 2.3.3.12  Working MOD ====
757 -
758 -The working MOD info is contained in the Digital in & Digital Interrupt byte (7^^th^^ Byte).
759 -
760 -User can use the 3^^rd^^ ~~ 7^^th^^  bit of this byte to see the working mod:
761 -
762 -Case 7^^th^^ Byte >> 2 & 0x1f:
763 -
764 -* 0: MOD1
765 -* 1: MOD2
766 -* 2: MOD3
767 -* 3: MOD4
768 -* 4: MOD5
769 -* 5: MOD6
770 -
771 -
772 772  == 2.4 Payload Decoder file ==
773 773  
774 774  

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