Last modified by Bei Jinggeng on 2025/01/10 15:51
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From version < 66.1 >
edited by Saxer Lin
on 2023/08/17 18:31
To version < 74.6 >
edited by Xiaoling
on 2023/09/26 08:50
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19 19  
20 20  (% style="color:blue" %)**SN50V3-LB **(%%)LoRaWAN Sensor Node is a Long Range LoRa Sensor Node. It is designed for outdoor use and powered by (% style="color:blue" %)** 8500mA Li/SOCl2 battery**(%%) for long term use.SN50V3-LB is designed to facilitate developers to quickly deploy industrial level LoRa and IoT solutions. It help users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to program, create and connect your things everywhere.
21 21  
22 -(% style="color:blue" %)**SN50V3-LB wireless part**(%%) is based on SX1262 allows the user to send data and reach extremely long ranges at low data-rates.It provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption.It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
22 +(% style="color:blue" %)**SN50V3-LB wireless part**(%%) is based on SX1262 allows the user to send data and reach extremely long ranges at low data-rates.It provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption.It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, and so on.
23 23  
24 24  (% style="color:blue" %)**SN50V3-LB **(%%)has a powerful 48Mhz ARM microcontroller with 256KB flash and 64KB RAM. It has multiplex I/O pins to connect to different sensors.
25 25  
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27 27  
28 28  SN50V3-LB is the 3^^rd^^ generation of LSN50 series generic sensor node from Dragino. It is an (% style="color:blue" %)**open source project**(%%) and has a mature LoRaWAN stack and application software. User can use the pre-load software for their IoT projects or easily customize the software for different requirements.
29 29  
30 -
31 31  == 1.2 ​Features ==
32 32  
33 33  
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584 584  
585 585  ==== 2.3.2.10  MOD~=10 (PWM input capture and output mode，Since firmware v1.2) ====
586 586  
586 +
587 587  In this mode, the uplink can perform PWM input capture, and the downlink can perform PWM output.
588 588  
589 +[[It should be noted when using PWM mode.>>||anchor="H2.3.3.12A0PWMMOD"]]
589 589  
591 +
590 590  ===== 2.3.2.10.a  Uplink, PWM input capture =====
591 591  
594 +
592 592  [[image:image-20230817172209-2.png||height="439" width="683"]]
593 593  
594 594  (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:690px" %)
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610 610  [[image:image-20230817170702-1.png||height="161" width="1044"]]
611 611  
612 612  
613 -(% style="color:blue" %)**AT+PWMSET=AA（Default is 0）  ==> Corresponding downlink: 0B AA**
616 +When the device detects the following PWM signal ,decoder will converts the pulse period and high-level duration to frequency and duty cycle.
614 614  
615 -When AA is 0, the unit of PWM capture time is microsecond. The capture frequency range is between 20HZ and 100000HZ. 
618 +**Frequency：**
616 616  
617 -When AA is 1, the unit of PWM capture time is millisecond.  The capture frequency range is between 5HZ and 250HZ. 
620 +(% class="MsoNormal" %)
621 +(% lang="EN-US" %)If (% style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; color:blue; font-family:Arial,sans-serif" %)**AT+PWMSET**(%%)**=0, **(% lang="EN-US" %)Frequency= 1000000/(%%)Pulse period（HZ）;
618 618  
623 +(% class="MsoNormal" %)
624 +(% lang="EN-US" %)If (% style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; color:blue; font-family:Arial,sans-serif" %)**AT+PWMSET**(%%)**=1, **(% lang="EN-US" %)Frequency= 1000/(%%)Pulse period（HZ）;
619 619  
626 +
627 +(% class="MsoNormal" %)
628 +**Duty cycle:**
629 +
630 +Duty cycle= Duration of high level/ Pulse period*100 ~(%).
631 +
632 +[[image:image-20230818092200-1.png||height="344" width="627"]]
633 +
634 +
620 620  ===== 2.3.2.10.b  Downlink, PWM output =====
621 621  
637 +
622 622  [[image:image-20230817173800-3.png||height="412" width="685"]]
623 623  
624 624  Downlink:  (% style="color:#037691" %)**0B xx xx xx yy zz zz**
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863 863  ==== 2.3.3.12  PWM MOD ====
864 864  
865 865  
882 +* (((
883 +The maximum voltage that the SDA pin of SN50v3 can withstand is 3.6V, and it cannot exceed this voltage value, otherwise the chip may be burned.
884 +)))
885 +* (((
886 +If the PWM pin connected to the SDA pin cannot maintain a high level when it is not working, you need to remove the resistor R2 or replace it with a resistor with a larger resistance, otherwise a sleep current of about 360uA will be generated. The position of the resistor is shown in the figure below:
887 +)))
888 +
889 + [[image:image-20230817183249-3.png||height="320" width="417"]]
890 +
891 +* (((
892 +The signal captured by the input should preferably be processed by hardware filtering and then connected in. The software processing method is to capture four values, discard the first captured value, and then take the middle value of the second, third, and fourth captured values.
893 +)))
894 +* (((
895 +Since the device can only detect a pulse period of 50ms when [[AT+PWMSET=0>>||anchor="H3.3.8PWMsetting"]] (counting in microseconds), it is necessary to change the value of PWMSET according to the frequency of input capture.
896 +
897 +
898 +
899 +)))
900 +
866 866  ==== 2.3.3.13  Working MOD ====
867 867  
868 868  
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1119 1119  * Example 2: Downlink Payload: 0A04  **~-~-->**  AT+MOD=4
1120 1120  
1121 1121  
1157 +=== 3.3.8 PWM setting ===
1158 +
1159 +
1160 +Feature: Set the time acquisition unit for PWM input capture.
1161 +
1162 +(% style="color:blue" %)**AT Command: AT+PWMSET**
1163 +
1164 +(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
1165 +|=(% style="width: 155px;background-color:#D9E2F3;color:#0070C0" %)**Command Example**|=(% style="width: 197px;background-color:#D9E2F3;color:#0070C0" %)**Function**|=(% style="width: 158px;background-color:#D9E2F3;color:#0070C0" %)**Response**
1166 +|(% style="width:154px" %)AT+PWMSET=?|(% style="width:196px" %)0|(% style="width:157px" %)(((
1167 +0(default)
1168 +
1169 +OK
1170 +)))
1171 +|(% style="width:154px" %)AT+PWMSET=0|(% style="width:196px" %)The unit of PWM capture time is microsecond. The capture frequency range is between 20HZ and 100000HZ.   |(% style="width:157px" %)(((
1172 +OK
1173 +
1174 +)))
1175 +|(% style="width:154px" %)AT+PWMSET=1|(% style="width:196px" %)The unit of PWM capture time is millisecond.  The capture frequency range is between 5HZ and 250HZ. |(% style="width:157px" %)OK
1176 +
1177 +(% style="color:blue" %)**Downlink Command: 0x0C**
1178 +
1179 +Format: Command Code (0x0C) followed by 1 bytes.
1180 +
1181 +* Example 1: Downlink Payload: 0C00  **~-~-->**  AT+PWMSET=0
1182 +* Example 2: Downlink Payload: 0C01  **~-~-->**  AT+PWMSET=1
1183 +
1184 +
1122 1122  = 4. Battery & Power Consumption =
1123 1123  
1124 1124  
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