Changes for page N95S31B -- NB-IoT Temperature & Humidity Sensor User Manual

Last modified by Mengting Qiu on 2024/04/02 16:44

From version < 120.1 >

edited by David Huang
on 2022/09/08 15:49

To version < 115.3 >

edited by Xiaoling
on 2022/07/09 16:59

Change comment: There is no comment for this version

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@@ -1,1 +1,1 @@
--XWiki.David
++XWiki.Xiaoling

Content

@@ -9,7 +9,6 @@
  **Table of Contents:**
--{{toc/}}
@@ -17,35 +17,21 @@
  = 1.  Introduction =
--
  == 1.1  What is N95S31B NB-IoT Sensor Node ==
  (((
--(((
  The Dragino N95S31B is a (% style="color:blue" %)**NB-IoT Temperature and Humidity Sensor**(%%) for Internet of Things solution. It is used to measure the (% style="color:blue" %)**surrounding environment temperature and relative air humidity precisely**(%%), and then upload to IoT server via NB-IoT network*.
--)))
--(((
  The temperature & humidity sensor used in N95S31B is SHT31, which is fully calibrated, linearized, and temperature compensated digital output from Sensirion, it provides a strong reliability and long-term stability. The SHT31 is fixed in a (% style="color:blue" %)**waterproof anti-condensation casing **(%%)for long term use.
--)))
--(((
  N95S31B supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP and CoAP**(%%) for different application requirement.
--)))
--(((
  N95S31B is powered by(% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to several years. (Real-world battery life depends on the use environment, update period. Please check related Power Analyze report).
--)))
--(((
--
--)))
--(((
  ~* make sure you have NB-IoT coverage locally.
--)))
  )))
@@ -56,7 +56,6 @@
  == 1.2  Features ==
--
  * NB-IoT Bands: B1/B3/B8/B5/B20/B28 @H-FDD
  * Monitor Temperature & Humidity via SHT31
  * AT Commands to change parameters
@@ -79,8 +79,6 @@
  * Supply Voltage: 2.1v ~~ 3.6v
  * Operating Temperature: -40 ~~ 85°C
--
--
  (% style="color:#037691" %)**NB-IoT Spec:**
  * - B1 @H-FDD: 2100MHz
@@ -90,10 +90,9 @@
  * - B20 @H-FDD: 800MHz
  * - B28 @H-FDD: 700MHz
--
--
  (% style="color:#037691" %)**Battery:**
++
  * Li/SOCI2 un-chargeable battery
  * Capacity: 8500mAh
  * Self Discharge: <1% / Year @ 25°C
@@ -105,7 +105,6 @@
  == 1.4  Applications ==
--
  * Smart Buildings & Home Automation
  * Logistics and Supply Chain Management
  * Smart Metering
@@ -117,20 +117,15 @@
++== 1.5  Pin Definitions ==
--== 1.5  Pin Definitions & Switch ==
--
--
  N95S31B use the mother board from NBSN95 which as below.
--
  [[image:image-20220709144723-1.png]]
--
  === 1.5.1  Jumper JP2 ===
--
  Power on Device when put this jumper.
@@ -137,20 +137,14 @@
  === 1.5.2  BOOT MODE / SW1 ===
--
--(((
 ) ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
--)))
--(((
 ) Flash: work mode, device starts to work and send out console output for further debug
--)))
  === 1.5.3  Reset Button ===
--
  Press to reboot the device.
@@ -157,7 +157,6 @@
  === 1.5.4  LED ===
--
  It will flash:
 . When boot the device in flash mode
@@ -164,11 +164,8 @@
 . Send an uplink packet
--
--
  = 2.  Use N95S31B to communicate with IoT Server =
--
  == 2.1  How it works ==
@@ -185,7 +185,7 @@
  )))
--[[image:1657520100595-569.png]]
++[[image:1657350248151-650.png]]
  (((
@@ -201,49 +201,26 @@
  [[image:image-20220709150546-2.png]]
--
  === 2.2.1  Test Requirement ===
--(((
  To use N95S31B in your city, make sure meet below requirements:
--)))
--* (((
--Your local operator has already distributed a NB-IoT Network there.
--)))
--* (((
--The local NB-IoT network used the band that N95S31B supports.
--)))
--* (((
--Your operator is able to distribute the data received in their NB-IoT network to your IoT server.
--)))
++* Your local operator has already distributed a NB-IoT Network there.
++* The local NB-IoT network used the band that N95S31B supports.
++* Your operator is able to distribute the data received in their NB-IoT network to your IoT server.
--(((
  Below figure shows our testing structure.   Here we have NB-IoT network coverage by China Mobile, the band they use is B8.
--)))
--(((
  N95S31B supports different communication protocol such as :
--)))
  (((
--* (((
--CoAP       ((% style="color:red" %)120.24.4.116:5683(%%))
--)))
--* (((
--raw UDP  ((% style="color:red" %)120.24.4.116:5601(%%))
--)))
--* (((
--MQTT      ((% style="color:red" %)120.24.4.116:1883(%%))
--)))
--* (((
--TCP          ((% style="color:red" %)120.24.4.116:5600(%%))
--)))
++* CoAP       ((% style="color:red" %)120.24.4.116:5683(%%))
++* raw UDP  ((% style="color:red" %)120.24.4.116:5601(%%))
++* MQTT      ((% style="color:red" %)120.24.4.116:1883(%%))
++* TCP          ((% style="color:red" %)120.24.4.116:5600(%%))
--(((
  We will show how to use with each protocol. The IP addresses above are our test server. User need to change to point their corresponding server.
--)))
  )))
@@ -254,7 +254,6 @@
  === 2.2.3  Insert SIM card ===
--
  (((
  Insert the NB-IoT Card get from your provider.
  )))
@@ -270,18 +270,14 @@
  === 2.2.4  Connect USB – TTL to N95S31B to configure it ===
--
  (((
  (((
  User need to configure N95S31B via serial port to set the (% style="color:blue" %)**Server Address** / **Uplink Topic** (%%)to define where and how-to uplink packets. N95S31B support AT Commands, user can use a USB to TTL adapter to connect to N95S31B and use AT Commands to configure it, as below.
--
--
  )))
  )))
  [[image:1657351312545-300.png]]
--
  **Connection:**
   (% style="background-color:yellow" %)USB TTL GND <~-~-~-~-> GND
@@ -305,9 +305,8 @@
  [[image:1657329814315-101.png]]
--
  (((
--(% style="color:red" %)**Note: the valid AT Commands can be found at:  **(%%)**[[https:~~/~~/www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i~~-~~-AyZcQkoua?dl=0>>https://www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i--AyZcQkoua?dl=0]]**
++(% style="color:red" %)Note: the valid AT Commands can be found at:  (%%)[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/N95S31B/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/N95S31B/]]
  )))
@@ -314,10 +314,9 @@
  === 2.2.5  Use CoAP protocol to uplink data ===
++(% style="color:red" %)Note: if you don't have CoAP server, you can refer this link to set up one: (%%)[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/>>http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]
--(% style="color:red" %)**Note: if you don't have CoAP server, you can refer this link to set up one: **(%%)**[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/>>http://wiki.dragino.com/xwiki/bin/view/Main/Set%20up%20CoAP%20Server/]]**
--
  (((
  **Use below commands:**
  )))
@@ -356,8 +356,6 @@
  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5601   **  (%%) ~/~/ to set UDP server address and port
  * (% style="color:blue" %)**AT+CFM=1       **   (%%) ~/~/ If the server does not respond, this command is unnecessary
--
--
  [[image:1657352391268-297.png]]
@@ -367,7 +367,6 @@
  === 2.2.7  Use MQTT protocol to uplink data ===
--
  N95S31B supports only plain MQTT now it doesn't support TLS and other related encryption.
  * (% style="color:blue" %)**AT+PRO=3   **       (%%)                                        ~/~/Set to use MQTT protocol to uplink
@@ -378,14 +378,11 @@
  * (% style="color:blue" %)**AT+PUBTOPIC=f9527                               **(%%)~/~/Set the sending topic of MQTT
  * (% style="color:blue" %)**AT+SUBTOPIC=Ns9527          **(%%)                  ~/~/Set the subscription topic of MQTT
--
--
  [[image:1657352634421-276.png]]
  [[image:1657352645687-385.png]]
--
  (((
  To save battery life, N95S31B will establish a subscription before each uplink and close the subscription 3 seconds after uplink successful. Any downlink commands from server will only arrive during the subscription period.
  )))
@@ -399,14 +399,11 @@
  === 2.2.8  Use TCP protocol to uplink data ===
--
  This feature is supported since firmware version v110
  * (% style="color:blue" %)**AT+PRO=4   ** (%%)                                          ~/~/ Set to use TCP protocol to uplink
  * (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5600   **(%%) ~/~/ to set TCP server address and port
--
--
  [[image:1657352898400-901.png]]
@@ -416,7 +416,6 @@
  === 2.2.9  Change Update Interval ===
--
  User can use below command to change the (% style="color:green" %)**uplink interval**.
  * (% style="color:blue" %)**AT+TDC=600      **  (%%)~/~/ Set Update Interval to 600s
@@ -430,88 +430,53 @@
  == 2.3  Uplink Payload ==
--(((
--N95S31B has different working mode for the connections of different type of sensors. This section describes these modes. User can use the AT Command (% style="color:blue" %)**AT+MOD**(%%) to set NBSN95 to different working modes.
--)))
++NBSN95 has different working mode for the connections of different type of sensors. This section describes these modes. User can use the AT Command (% style="color:blue" %)**AT+MOD**(%%) to set NBSN95 to different working modes.
--(((
  For example:
--)))
--(((
-- (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/will set the N95S31B to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.
--)))
++ (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/will set the NBSN95 to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.
--(((
  The uplink payloads are composed in  ASCII String. For example:
--)))
--(((
 a cd 00 ed 0a cc 00 00 ef 02 d2 1d (total 24 ASCII Chars) . Representative the actually payload:
--)))
--(((
 x 0a cd 00 ed 0a cc 00 00 ef 02 d2 1d  Total 12 bytes
--)))
--(((
  (% style="color:red" %)**NOTE:**
--)))
  (% style="color:red" %)
--1. (((
--**All modes share the same Payload Explanation from [[HERE>>||anchor="H2.3A0UplinkPayload"]].**
--)))
--1. (((
--**By default, the device will send an uplink message every 1 hour.**
++1. All modes share the same Payload Explanation from [[HERE>>path:#Payload_Explain]].
++1. By default, the device will send an uplink message every 1 hour.
--
--)))
--
  === 2.3.1  Payload Analyze ===
--
  N95S31B uplink payload includes in total 21 bytes
--(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:520px" %)
++(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:440px" %)
  |=(% style="width: 60px;" %)(((
  **Size(bytes)**
--)))|=(% style="width: 50px;" %)**6**|=(% style="width: 25px;" %)2|=(% style="width: 25px;" %)**2**|=(% style="width: 70px;" %)**1**|=(% style="width: 55px;" %)1|=(% style="width: 115px;" %)5|=(% style="width: 60px;" %)**2**|=(% style="width: 60px;" %)**2**
--|(% style="width:97px" %)**Value**|(% style="width:83px" %)[[Device ID>>||anchor="H2.3.2A0DeviceID"]]|(% style="width:41px" %)[[Ver>>||anchor="H2.3.3A0VersionInfo"]]|(% style="width:46px" %)[[BAT>>||anchor="H2.3.4A0BatteryInfo"]]|(% style="width:123px" %)[[Signal Strength>>||anchor="H2.3.5A0SignalStrength"]]|(% style="width:123px" %)MOD 0X01|(% style="width:99px" %)(((
--(((
++)))|=(% style="width: 60px;" %)**6**|=(% style="width: 35px;" %)2|=(% style="width: 35px;" %)**2**|=(% style="width: 80px;" %)**1**|=(% style="width: 80px;" %) |=(% style="width: 99px;" %) |=(% style="width: 77px;" %)**2**|=(% style="width: 60px;" %)**1**
++|(% style="width:97px" %)**Value**|(% style="width:83px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:41px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:46px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:123px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:123px" %)MOD 0X01|(% style="width:99px" %)(((
  Reserve/ Same as NBSN95 CFGMOD=1
--)))
--(((
  No function here.
--)))
  )))|(% style="width:77px" %)(((
--(((
--[[Temperature >>||anchor="H2.3.6A0Temperature26Humidity"]]
--)))
++[[Temperature >>||anchor="H2.4.5A0Distance"]]
--(((
  By SHT31
--)))
  )))|(% style="width:80px" %)(((
--(((
--[[Humidity>>||anchor="H2.3.6A0Temperature26Humidity"]]
--)))
++[[Humidity>>||anchor="H2.4.6A0DigitalInterrupt"]]
--(((
  By SHT31
  )))
--)))
  (((
--
--
  (((
  If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NB sensor uplink data.
  )))
@@ -544,7 +544,6 @@
  === 2.3.2  Device ID ===
--
  (((
  By default, the Device ID equal to the last 6 bytes of IMEI.
  )))
@@ -570,25 +570,14 @@
  === 2.3.3  Version Info ===
--(((
  These bytes include the hardware and software version.
--)))
--(((
  Higher byte: Specify hardware version: always 0x00 for N95S31B
--)))
--(((
  Lower byte: Specify the software version: 0x6E=110, means firmware version 110
--)))
--(((
--
--)))
--(((
  For example: 0x00 6E: this device is N95S31B with firmware version 110.
--)))
  (((
@@ -597,7 +597,6 @@
  === 2.3.4  Battery Info ===
--
  (((
  Ex1: 0x0B45 = 2885mV
  )))
@@ -610,7 +610,6 @@
  === 2.3.5  Signal Strength ===
--
  (((
  NB-IoT Network signal Strength.
  )))
@@ -643,7 +643,6 @@
  === 2.3.6  Temperature & Humidity ===
--
  The device will be able to get the SHT31 temperature and humidity data now and upload to IoT Server.
  [[image:image-20220709161741-3.png]]
@@ -660,11 +660,10 @@
--== 2.4  Downlink Payload ==
++== 2.5  Downlink Payload ==
++By default, NDDS75 prints the downlink payload to console port.
--By default, N95S31B prints the downlink payload to console port.
--
  [[image:image-20220709100028-1.png]]
@@ -701,7 +701,7 @@
  )))
  (((
--If payload = 0x04FF, it will reset the N95S31B
++If payload = 0x04FF, it will reset the NDDS75
  )))
@@ -713,17 +713,51 @@
--== 2.5  Battery Analysis ==
++== 2.6  LED Indicator ==
--=== 2.5.1  Battery Type ===
++The NDDS75 has an internal LED which is to show the status of different state.
++* When power on, NDDS75 will detect if sensor probe is connected, if probe detected, LED will blink four times. (no blinks in this step is no probe)
++* Then the LED will be on for 1 second means device is boot normally.
++* After NDDS75 join NB-IoT network. The LED will be ON for 3 seconds.
++* For each uplink probe, LED will be on for 500ms.
++
  (((
--The N95S31B battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
++
  )))
++
++
++== 2.7  Firmware Change Log ==
++
++
  (((
++Download URL & Firmware Change log
++)))
++
++(((
++[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/]]
++)))
++
++
++(((
++Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
++)))
++
++
++
++== 2.8  Battery Analysis ==
++
++=== 2.8.1  Battery Type ===
++
++
++(((
++The NDDS75 battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
++)))
++
++(((
  The battery is designed to last for several years depends on the actually use environment and update interval.
  )))
@@ -741,37 +741,56 @@
--=== 2.5.2  Power consumption Analyze ===
++=== 2.8.2  Power consumption Analyze ===
++(((
++Dragino battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
++)))
++
  (((
--The file **DRAGINO_N95S31B-Power-Analyzer.pdf** from [[https:~~/~~/www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i~~-~~-AyZcQkoua?dl=0>>https://www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i--AyZcQkoua?dl=0]] describes a detail measurement to analyze the power consumption in different case. User can use it for design guideline for their project.
++Instruction to use as below:
  )))
  (((
--
++(% style="color:blue" %)**Step 1:  **(%%)Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]
  )))
--=== 2.5.3  Battery Note ===
++(((
++(% style="color:blue" %)**Step 2: **(%%) Open it and choose
++)))
++* (((
++Product Model
++)))
++* (((
++Uplink Interval
++)))
++* (((
++Working Mode
++)))
  (((
--The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to uplink data, then the battery life may be decreased.
++And the Life expectation in difference case will be shown on the right.
  )))
++[[image:image-20220709110451-3.png]]
--=== 2.5.4  Replace the battery ===
++=== 2.8.3  Battery Note ===
  (((
--You can change the battery in the N95S31B.The type of battery is not limited as long as the output is between 3v to 3.6v.  On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
++The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
  )))
++
++=== 2.8.4  Replace the battery ===
++
  (((
--The default battery pack of N95S31B includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).
++The default battery pack of NDDS75 includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).
  )))
@@ -778,7 +778,6 @@
  = 3.  Access NB-IoT Module =
--
  (((
  Users can directly access the AT command set of the NB-IoT module.
  )))
@@ -785,8 +785,6 @@
  (((
  The AT Command set can refer the BC35-G NB-IoT Module AT Command: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=datasheet/other_vendors/BC35-G/>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/other_vendors/BC35-G/]]
--
--
  )))
  [[image:1657333200519-600.png]]
@@ -795,13 +795,11 @@
  = 4.  Using the AT Commands =
--
  == 4.1  Access AT Commands ==
++See this link for detail: [[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/>>url:http://www.dragino.com/downloads/index.php?dir=NB-IoT/NBSN50/]]
--See NBSN95 AT Command in this link for detail:  [[https:~~/~~/www.dropbox.com/sh/jao1xt9kw5r3yq4/AAAMpJkZzExF2JLbRWxGoQ9Na?dl=0>>https://www.dropbox.com/sh/jao1xt9kw5r3yq4/AAAMpJkZzExF2JLbRWxGoQ9Na?dl=0]]
--
  AT+<CMD>?                    : Help on <CMD>
  AT+<CMD>                      : Run <CMD>
@@ -875,7 +875,6 @@
  = 5.  FAQ =
--
  == 5.1  How to Upgrade Firmware ==
@@ -888,18 +888,13 @@
  )))
  (((
--
--
--(((
--(% style="color:red" %)**Notice, N95S31B and LSN50v2 share the same mother board. They use the same connection and method to update.**
++(% style="color:red" %)Notice, NDDS75 and LDDS75 share the same mother board. They use the same connection and method to update.
  )))
--)))
  = 6.  Trouble Shooting =
--
  == 6.1  Connection problem when uploading firmware ==
@@ -915,7 +915,6 @@
  == 6.2  AT Command input doesn't work ==
--
  (((
  In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:green" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:green" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.
@@ -926,7 +926,7 @@
  = 7.  Order Info =
--Part Number**:** (% style="color:#4f81bd" %)**N95S31B-YY**
++Part Number**:** (% style="color:#4f81bd" %)**NSDDS75**
  (% class="wikigeneratedid" %)
@@ -941,7 +941,7 @@
  (% style="color:#037691" %)**Package Includes**:
--* N95S31B NB-IoT Temperature and Humidity Sensor
++* NSE01 NB-IoT Distance Detect Sensor Node x 1
  * External antenna x 1
  )))
@@ -950,10 +950,11 @@
  (% style="color:#037691" %)**Dimension and weight**:
++
  * Device Size: 13.0 x 5 x 4.5 cm
  * Device Weight: 150g
--* Package Size / pcs : 14.0 x 8x 5 cm
--* Weight / pcs : 180g
++* Package Size / pcs : 15 x 12x 5.5 cm
++* Weight / pcs : 220g
  )))
  (((
@@ -965,9 +965,5 @@
  = 9.  Support =
--
  * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
  * Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]]
--
--
--

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Changes for page N95S31B -- NB-IoT Temperature & Humidity Sensor User Manual

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