Changes for page LT-22222-L -- LoRa I/O Controller User Manual

Last modified by Mengting Qiu on 2025/06/04 18:42

From 68.18 to 68.17 From 77.26 to 77.25

From version 77.25

edited by Xiaoling
on 2022/06/10 08:41

Change comment: There is no comment for this version

To version 68.18

edited by Xiaoling
on 2022/05/25 15:23

Change comment: There is no comment for this version

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@@ -11,15 +11,12 @@
--
--
--
  = 1.Introduction =
  == 1.1 What is LT Series I/O Controller ==
  (((
--The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
++The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
  )))
  (((
@@ -27,7 +27,7 @@
  )))
  (((
--The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
++The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
  )))
  (((
@@ -51,8 +51,6 @@
  == 1.2  Specifications ==
  (((
--
--
  **Hardware System:**
  )))
@@ -75,7 +75,6 @@
  )))
  )))
--
  (((
  **Interface for Model: LT22222-L:**
  )))
@@ -99,7 +99,6 @@
  Power Input 7~~ 24V DC.
  )))
--
  (((
  **LoRa Spec:**
  )))
@@ -164,8 +164,6 @@
  )))
--
--
  == 1.3 Features ==
  * LoRaWAN Class A & Class C protocol
@@ -177,7 +177,6 @@
  * Counting
--
  == 1.4  Applications ==
  * Smart Buildings & Home Automation
@@ -188,7 +188,6 @@
  * Smart Factory
--
  == 1.5 Hardware Variants ==
  (% border="1" style="background-color:#f7faff; width:500px" %)
@@ -215,7 +215,6 @@
  [[image:1653297104069-180.png]]
--
  = 3. Operation Mode =
  == 3.1 How it works? ==
@@ -230,8 +230,6 @@
  )))
--
--
  == 3.2 Example to join LoRaWAN network ==
  (((
@@ -273,7 +273,6 @@
  [[image:1653298044601-602.png||height="405" width="709"]]
--
  == 3.3 Uplink Payload ==
  There are five working modes + one interrupt mode on LT for different type application:
@@ -286,7 +286,6 @@
  * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
--
  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
  The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
@@ -322,7 +322,6 @@
  * [1] RO1 relay channel is close and the RO1 LED is ON.
  * [0] RO2 relay channel is open and RO2 LED is OFF;
--
  **LT22222-L:**
  * [1] DI2 channel is high input and DI2 LED is ON;
@@ -338,8 +338,6 @@
  ** DO1 is high in case there is load between DO1 and V+.
  ** DO1 LED is off in both case
--
--
  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
  **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
@@ -432,8 +432,6 @@
  )))
  )))
--
--
  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
  **LT22222-L**: This mode the DI1 is used as a counting pin.
@@ -474,12 +474,8 @@
  (((
  Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
--
--
  )))
--
--
  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
  **LT22222-L**: This mode the DI1 is used as a counting pin.
@@ -560,8 +560,6 @@
  )))
  )))
--
--
  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
  **LT22222-L**: This mode the DI1 is used as a counting pin.
@@ -602,12 +602,8 @@
  (((
  Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
--
--
  )))
--
--
  === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
  (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
@@ -634,7 +634,6 @@
  AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
--
  (% style="color:#4f81bd" %)**Trigger base on current**:
  Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
@@ -643,7 +643,6 @@
  AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
--
  (% style="color:#4f81bd" %)**Trigger base on DI status**:
  DI status trigger Flag.
@@ -730,18 +730,12 @@
  When device got this command, it will send the MOD6 payload.
--
--
  === 3.3.7 Payload Decoder ===
  (((
  **Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]
--
--
  )))
--
--
  == 3.4 Configure LT via AT or Downlink ==
  User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
@@ -750,18 +750,14 @@
  There are two kinds of Commands:
  )))
--* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
++* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
  * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
--
--
  === 3.4.1 Common Commands ===
  They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
--
--
  === 3.4.2 Sensor related commands ===
  ==== 3.4.2.1 Set Transmit Interval ====
@@ -784,8 +784,6 @@
  **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
  )))
--
--
  ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
  Set work mode.
@@ -806,8 +806,6 @@
  **0x0A aa     ~/~/ Same as AT+MOD=aa**
  )))
--
--
  ==== 3.4.2.3 Poll an uplink ====
  * AT Command:
@@ -823,11 +823,9 @@
  **Example**: 0x08FF, ask device to send an Uplink
--
--
  ==== 3.4.2.4 Enable Trigger Mode ====
--Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
++Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
  * AT Command:
@@ -847,8 +847,6 @@
  **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
  )))
--
--
  ==== 3.4.2.5 Poll trigger settings ====
  Poll trigger settings,
@@ -864,8 +864,6 @@
  **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
  )))
--
--
  ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
  Enable Disable DI1/DI2/DI2 as trigger,
@@ -888,8 +888,6 @@
  **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
  )))
--
--
  ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
  Set DI1 or DI3(for LT-33222-L) trigger.
@@ -916,8 +916,6 @@
  **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
  )))
--
--
  ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
  Set DI2 trigger.
@@ -944,10 +944,9 @@
  **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
  )))
--
  ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
--Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
++Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
  * AT Command:
@@ -960,19 +960,18 @@
  (% class="box infomessage" %)
  (((
--**0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
++**0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
  )))
--
  ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
--Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
++Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
  * AT Command:
  (% class="box infomessage" %)
  (((
--**AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
++**AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
  )))
  * Downlink Payload (prefix 0xAA 00 ):
@@ -979,10 +979,9 @@
  (% class="box infomessage" %)
  (((
--**0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
++**0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
  )))
--
  ==== 3.4.2.11 Trigger – Set minimum interval ====
  Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
@@ -1001,7 +1001,6 @@
  **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
  )))
--
  ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
  * AT Command:
@@ -1176,13 +1176,13 @@
  ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
--When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
++When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
  * AT Command:
  (% class="box infomessage" %)
  (((
--**AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
++**AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
  )))
  * Downlink Payload (prefix 0xA5):
@@ -1192,7 +1192,6 @@
  **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
  )))
--
  ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
  * AT Command:
@@ -1217,7 +1217,6 @@
  **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
  )))
--
  ==== 3.4.2.18 Counting ~-~- Clear Counting ====
  Clear counting for counting mode
@@ -1236,7 +1236,6 @@
  **0x A6 01     ~/~/ clear all counting,**
  )))
--
  ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
  * AT Command:
@@ -1255,8 +1255,6 @@
  (((
  range: aa bb cc:0 to 16777215,  (unit:second)
--
--
  )))
  == 3.5 Integrate with Mydevice ==
@@ -1277,7 +1277,6 @@
  [[image:image-20220524094641-12.png||height="402" width="718"]]
--
  **Step 3**: Create an account or log in Mydevices.
  **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
@@ -1286,7 +1286,6 @@
  [[image:1653356838789-523.png||height="337" width="740"]]
--
  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
  [[image:image-20220524094909-1.png||height="335" width="729"]]
@@ -1299,7 +1299,6 @@
  [[image:image-20220524094909-5.png||height="341" width="734"]]
--
  == 3.6 Interface Detail ==
  === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
@@ -1308,7 +1308,6 @@
  [[image:1653356991268-289.png]]
--
  === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
  (((
@@ -1324,105 +1324,51 @@
  [[image:1653357170703-587.png]]
  (((
--(((
  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
  )))
--)))
--(((
--
--)))
--(((
  **Example1**: Connect to a Low active sensor.
--)))
--(((
  This type of sensor will output a low signal GND when active.
--)))
--* (((
--Connect sensor’s output to DI1-
--)))
--* (((
--Connect sensor’s VCC to DI1+.
--)))
++* Connect sensor’s output to DI1-
++* Connect sensor’s VCC to DI1+.
--(((
--So when sensor active, the current between NEC2501 pin1 and pin2 is：
--)))
++So when sensor active, the current between NEC2501 pin1 and pin2 is：
--(((
--[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
--)))
++[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**  [[image:image-20220524095628-8.png]]  = DI1+ / 1K.**
--(((
--If DI1+ = 12v, the [[image:1653968155772-850.png||height="23" width="19"]]= 12mA , So the LT-22222-L will be able to detect this active signal.
--)))
++If DI1+ = 12v, the //IF//  = 12mA , So the LT-22222-L will be able to detect this active signal.
--(((
--
--)))
--(((
  **Example2**: Connect to a High active sensor.
--)))
--(((
  This type of sensor will output a high signal (example 24v) when active.
--)))
--* (((
--Connect sensor’s output to DI1+
--)))
--* (((
--Connect sensor’s GND DI1-.
--)))
++* Connect sensor’s output to DI1+
++* Connect sensor’s GND DI1-.
--(((
  So when sensor active, the current between NEC2501 pin1 and pin2 is:
--)))
--(((
--[[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
--)))
++[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**    [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
--(((
--If **DI1+ = 24v**, the[[image:1653968155772-850.png||height="23" width="19"]] 24mA , So the LT-22222-L will be able to detect this high active signal.
--)))
++If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
--(((
--
--)))
--(((
  **Example3**: Connect to a 220v high active sensor.
--)))
--(((
  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler
--)))
--* (((
--Connect sensor’s output to DI1+ with a serial 50K resistor
--)))
--* (((
--Connect sensor’s GND DI1-.
--)))
++* Connect sensor’s output to DI1+ with a serial 50K resistor
++* Connect sensor’s GND DI1-.
--(((
  So when sensor active, the current between NEC2501 pin1 and pin2 is:
--)))
--(((
--   [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
--)))
++   [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
--(((
--If sensor output is 220v, the [[image:1653968155772-850.png||height="23" width="19"]](% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
--)))
++If sensor output is 220v, the (% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
--
  === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
@@ -1429,7 +1429,6 @@
  [[image:1653357531600-905.png]]
--
  === 3.6.4 Analog Input Interface ===
  The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
@@ -1457,7 +1457,6 @@
  [[image:1653357648330-671.png||height="155" width="733"]]
--
  === 3.6.5 Relay Output ===
  (((
@@ -1468,12 +1468,10 @@
  [[image:image-20220524100215-10.png||height="382" width="723"]]
--
  == 3.7 LEDs Indicators ==
  [[image:image-20220524100748-11.png]]
--
  = 4. Use AT Command =
  == 4.1 Access AT Command ==
@@ -1674,8 +1674,6 @@
  (((
  AT+CFG: Print all settings
--
--
  )))
  == 4.2 Common AT Command Sequence ==
@@ -1717,8 +1717,6 @@
  (((
  (% style="background-color:#dcdcdc" %)ATZ
--
--
  )))
  === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
@@ -1800,7 +1800,6 @@
  (% style="background-color:#dcdcdc" %)AT+CLASS=A
  ATZ
--
  = 5. FAQ =
  == 5.1 How to upgrade the image? ==
@@ -1831,7 +1831,6 @@
  [[image:1653360054704-518.png||height="186" width="745"]]
--
  (((
  (((
  == 5.2 How to change the LoRa Frequency Bands/Region? ==
@@ -1840,8 +1840,6 @@
  (((
  User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
--
--
  )))
  (((
@@ -1895,18 +1895,10 @@
  [[image:1653360498588-932.png||height="485" width="726"]]
--
  == 5.4 Can I see counting event in Serial? ==
  (((
  User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.
--
--
--== 5.5 Can i use point to point communication for LT-22222-L? ==
--
--Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
--
--
  )))
  (((
@@ -1920,8 +1920,10 @@
  )))
  (((
--Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
++Please see this link for how to debug:
++[[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork]]
++
  )))
@@ -1930,7 +1930,9 @@
  )))
  (((
--See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
++See this link for trouble shooting:
++
++[[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/>>http://wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]]
  )))
  (((
@@ -1942,7 +1942,9 @@
  )))
  (((
--It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
++It might be about the channels mapping. Please see this link for detail:
++
++[[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband]]
  )))
  (((
@@ -2016,8 +2016,6 @@
  (((
  * (((
  (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
--
--
  )))
  = 8. Packing Info =
@@ -2050,8 +2050,6 @@
  * Device Weight: 105g
  * Package Size / pcs : 14.5 x 8 x 5 cm
  * Weight / pcs : 170g
--
--
  )))
  )))
@@ -2073,8 +2073,6 @@
  (((
  (((
           [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
--
--
  )))
  (((

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