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

Last modified by Saxer Lin on 2025/04/15 17:24

From version < 66.19 >

edited by Xiaoling
on 2022/05/24 13:51

To version < 68.19 >

edited by Xiaoling
on 2022/05/25 15:28

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@@ -41,48 +41,122 @@
  (((
  [[image:1653295757274-912.png]]
++
++
  )))
  == 1.2  Specifications ==
++(((
  **Hardware System:**
++)))
--* STM32L072CZT6 MCU
--* SX1276/78 Wireless Chip
--* Power Consumption:
--** Idle: 4mA@12v
--** 20dB Transmit: 34mA@12v
++* (((
++STM32L072CZT6 MCU
++)))
++* (((
++SX1276/78 Wireless Chip
++)))
++* (((
++(((
++Power Consumption:
++)))
++* (((
++Idle: 4mA@12v
++)))
++* (((
++20dB Transmit: 34mA@12v
++)))
++)))
++
++(((
  **Interface for Model: LT22222-L:**
++)))
--* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
--* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
--* 2 x Relay Output (5A@250VAC / 30VDC)
--* 2 x 0~~20mA Analog Input (res:0.01mA)
--* 2 x 0~~30V Analog Input (res:0.01v)
--* Power Input 7~~ 24V DC.
++* (((
++2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
++)))
++* (((
++2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
++)))
++* (((
++2 x Relay Output (5A@250VAC / 30VDC)
++)))
++* (((
++2 x 0~~20mA Analog Input (res:0.01mA)
++)))
++* (((
++2 x 0~~30V Analog Input (res:0.01v)
++)))
++* (((
++Power Input 7~~ 24V DC.
++)))
++(((
  **LoRa Spec:**
++)))
--* Frequency Range:
--** Band 1 (HF): 862 ~~ 1020 Mhz
--** Band 2 (LF): 410 ~~ 528 Mhz
--* 168 dB maximum link budget.
--* +20 dBm - 100 mW constant RF output vs.
--* +14 dBm high efficiency PA.
--* Programmable bit rate up to 300 kbps.
--* High sensitivity: down to -148 dBm.
--* Bullet-proof front end: IIP3 = -12.5 dBm.
--* Excellent blocking immunity.
--* Low RX current of 10.3 mA, 200 nA register retention.
--* Fully integrated synthesizer with a resolution of 61 Hz.
--* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
--* Built-in bit synchronizer for clock recovery.
--* Preamble detection.
--* 127 dB Dynamic Range RSSI.
--* Automatic RF Sense and CAD with ultra-fast AFC.
--* Packet engine up to 256 bytes with CRC.
++* (((
++(((
++Frequency Range:
++)))
++* (((
++Band 1 (HF): 862 ~~ 1020 Mhz
++)))
++* (((
++Band 2 (LF): 410 ~~ 528 Mhz
++)))
++)))
++* (((
++168 dB maximum link budget.
++)))
++* (((
+++20 dBm - 100 mW constant RF output vs.
++)))
++* (((
+++14 dBm high efficiency PA.
++)))
++* (((
++Programmable bit rate up to 300 kbps.
++)))
++* (((
++High sensitivity: down to -148 dBm.
++)))
++* (((
++Bullet-proof front end: IIP3 = -12.5 dBm.
++)))
++* (((
++Excellent blocking immunity.
++)))
++* (((
++Low RX current of 10.3 mA, 200 nA register retention.
++)))
++* (((
++Fully integrated synthesizer with a resolution of 61 Hz.
++)))
++* (((
++FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
++)))
++* (((
++Built-in bit synchronizer for clock recovery.
++)))
++* (((
++Preamble detection.
++)))
++* (((
++127 dB Dynamic Range RSSI.
++)))
++* (((
++Automatic RF Sense and CAD with ultra-fast AFC.
++)))
++* (((
++Packet engine up to 256 bytes with CRC.
++
++
++)))
++
  == 1.3 Features ==
  * LoRaWAN Class A & Class C protocol
@@ -93,6 +93,7 @@
  * Firmware upgradable via program port
  * Counting
++
  == 1.4  Applications ==
  * Smart Buildings & Home Automation
@@ -102,6 +102,7 @@
  * Smart Cities
  * Smart Factory
++
  == 1.5 Hardware Variants ==
  (% border="1" style="background-color:#f7faff; width:500px" %)
@@ -115,6 +115,8 @@
  * 1 x Counting Port
  )))
++
++
  = 2. Power ON Device =
  The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
@@ -125,21 +125,29 @@
  [[image:1653297104069-180.png]]
++
  = 3. Operation Mode =
  == 3.1 How it works? ==
++(((
  The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second.
++)))
--In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
++(((
++In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
--3.2 Example to join LoRaWAN network
++
++)))
++== 3.2 Example to join LoRaWAN network ==
++
++(((
  This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here.
++)))
  [[image:image-20220523172350-1.png||height="266" width="864"]]
--
  (((
  The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
  )))
@@ -160,10 +160,12 @@
  [[image:1653297955910-247.png||height="321" width="716"]]
++
  Add APP KEY and DEV EUI
  [[image:1653298023685-319.png]]
++
  (((
  **Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
  )))
@@ -170,6 +170,7 @@
  [[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:
@@ -181,6 +181,7 @@
  * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
  * **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.
@@ -216,6 +216,7 @@
  * [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;
@@ -231,11 +231,14 @@
  ** 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.
++(((
  Total : 11 bytes payload
++)))
  [[image:image-20220523180452-3.png]]
@@ -249,54 +249,79 @@
  * FIRST: Indicate this is the first packet after join network.
  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
++(((
  (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
++)))
++(((
  **To use counting mode, please run:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+MOD=2**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **ATZ**
  )))
++)))
++(((
  (% style="color:#4f81bd" %)**AT Commands for counting:**
++)))
++(((
  **For LT22222-L:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
  )))
++)))
++
  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
  **LT22222-L**: This mode the DI1 is used as a counting pin.
@@ -313,22 +313,34 @@
  * FIRST: Indicate this is the first packet after join network.
  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
++(((
  (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
++)))
++(((
  **To use counting mode, please run:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+MOD=3**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **ATZ**
  )))
++)))
--Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
++(((
++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.
@@ -347,45 +347,69 @@
  * FIRST: Indicate this is the first packet after join network.
  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
++(((
  (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
++)))
++(((
  **To use this mode, please run:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+MOD=4**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **ATZ**
  )))
++)))
++(((
++
++)))
--Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
++(((
++Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
++)))
++(((
  **Plus below command for AVI1 Counting:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+SETCNT=3,60   (set AVI Count to 60)**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
  )))
++)))
++
  === 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.
@@ -398,24 +398,38 @@
  * RO is for relay. ROx=1 : close，ROx=0 always open.
  * FIRST: Indicate this is the first packet after join network.
--* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
++* (((
++DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
++)))
++(((
  (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
++)))
++(((
  **To use this mode, please run:**
++)))
  (% class="box infomessage" %)
  (((
++(((
  **AT+MOD=5**
  )))
++)))
  (% class="box infomessage" %)
  (((
++(((
  **ATZ**
  )))
++)))
--Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
++(((
++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.**
@@ -536,10 +536,13 @@
  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 ==
@@ -554,10 +554,12 @@
  * (% 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>>http://8.211.40.43:8080/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
++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 ====
@@ -580,6 +580,7 @@
  **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
  )))
++
  ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
  Set work mode.
@@ -600,6 +600,7 @@
  **0x0A aa     ~/~/ Same as AT+MOD=aa**
  )))
++
  ==== 3.4.2.3 Poll an uplink ====
  * AT Command:
@@ -615,6 +615,7 @@
  **Example**: 0x08FF, ask device to send an Uplink
++
  ==== 3.4.2.4 Enable Trigger Mode ====
  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]]
@@ -637,6 +637,7 @@
  **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
  )))
++
  ==== 3.4.2.5 Poll trigger settings ====
  Poll trigger settings,
@@ -652,6 +652,7 @@
  **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,
@@ -674,6 +674,7 @@
  **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.
@@ -700,6 +700,7 @@
  **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.
@@ -726,6 +726,7 @@
  **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>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
@@ -744,6 +744,7 @@
  **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>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
@@ -762,6 +762,7 @@
  **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.
@@ -780,6 +780,7 @@
  **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:
@@ -822,8 +822,10 @@
  (% class="box infomessage" %)
  (((
++(((
  **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
  )))
++)))
  This is to control the digital output time of DO pin. Include four bytes:
@@ -968,6 +968,7 @@
  **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
  )))
++
  ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
  * AT Command:
@@ -992,6 +992,7 @@
  **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
@@ -1010,6 +1010,7 @@
  **0x A6 01     ~/~/ clear all counting,**
  )))
++
  ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
  * AT Command:
@@ -1026,21 +1026,28 @@
  **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
  )))
++(((
  range: aa bb cc:0 to 16777215,  (unit:second)
++
++)))
++
  == 3.5 Integrate with Mydevice ==
  Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
++(((
  **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
++)))
++(((
  **Step 2**: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
++)))
  [[image:1653356737703-362.png||height="232" width="732"]]
  [[image:image-20220524094641-11.png||height="390" width="723"]]
--
  [[image:image-20220524094641-12.png||height="402" width="718"]]
  **Step 3**: Create an account or log in Mydevices.
@@ -1051,6 +1051,7 @@
  [[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"]]
@@ -1063,6 +1063,7 @@
  [[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 ) ===
@@ -1071,6 +1071,7 @@
  [[image:1653356991268-289.png]]
++
  === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
  (((
@@ -1099,7 +1099,7 @@
  So when sensor active, the current between NEC2501 pin1 and pin2 is：
--  //IF//  = 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 //IF//  = 12mA , So the LT-22222-L will be able to detect this active signal.
@@ -1113,9 +1113,9 @@
  So when sensor active, the current between NEC2501 pin1 and pin2 is:
--[[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:/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.**
++[[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:/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:/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.
++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.
@@ -1127,10 +1127,11 @@
  So when sensor active, the current between NEC2501 pin1 and pin2 is:
--   [[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:/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.**
++   [[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 (% 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.
@@ -1137,6 +1137,7 @@
  [[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:
@@ -1164,6 +1164,7 @@
  [[image:1653357648330-671.png||height="155" width="733"]]
++
  === 3.6.5 Relay Output ===
  (((
@@ -1174,10 +1174,12 @@
  [[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 ==
@@ -1186,11 +1186,15 @@
  [[image:1653358238933-385.png]]
++(((
  In PC, User needs to set (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**)(%%) to active it. As shown below:
++)))
  [[image:1653358355238-883.png]]
++(((
  More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
++)))
  (((
  AT+<CMD>?        : Help on <CMD>
@@ -1374,6 +1374,8 @@
  (((
  AT+CFG: Print all settings
++
++
  )))
  == 4.2 Common AT Command Sequence ==
@@ -1415,6 +1415,8 @@
  (((
  (% style="background-color:#dcdcdc" %)ATZ
++
++
  )))
  === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
@@ -1496,6 +1496,7 @@
  (% style="background-color:#dcdcdc" %)AT+CLASS=A
  ATZ
++
  = 5. FAQ =
  == 5.1 How to upgrade the image? ==
@@ -1508,11 +1508,13 @@
  Below shows the hardware connection for how to upload an image to the LT:
  * [[image:1653359603330-121.png]]
++(((
  **Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
  **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
  **Step3: **Open flashloader; choose the correct COM port to update.
  **For LT-22222-L**:
  Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
++)))
    [[image:image-20220524103407-12.png]]
@@ -1524,6 +1524,7 @@
  [[image:1653360054704-518.png||height="186" width="745"]]
++
  (((
  (((
  == 5.2 How to change the LoRa Frequency Bands/Region? ==
@@ -1531,7 +1531,9 @@
  )))
  (((
--User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
++User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
++
++
  )))
  (((
@@ -1558,10 +1558,15 @@
  [[image:1653360231087-571.png||height="401" width="727"]]
  )))
++(((
  (% style="color:red" %)Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
++)))
++(((
  (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
++)))
++(((
  (% style="background-color:#dcdcdc" %)123456 (%%)  Enter Password to have AT access.
  (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
  (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
@@ -1572,19 +1572,25 @@
  (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
  (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
  (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
++)))
++(((
  As shown in below:
++)))
  [[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.
++
++
  )))
  (((
--= 6. Trouble Shooting   =
++= 6. Trouble Shooting =
  )))
  (((
@@ -1594,13 +1594,11 @@
  )))
  (((
--Please see this link for how to debug:
++Please see this link for how to debug:
--[[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
--)))
++[[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]]
--(((
--[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
++
  )))
  (((
@@ -1609,10 +1609,12 @@
  (((
  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/]]
  )))
  (((
--[[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
++
  )))
  (((
@@ -1621,10 +1621,12 @@
  (((
  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]]
  )))
  (((
--[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
++
  )))
  (((
@@ -1643,34 +1643,61 @@
  )))
  )))
++(((
  * (((
  (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
  )))
++)))
++
++(((
  * (((
  (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
  )))
++)))
  (((
--* (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
++* (((
++(% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
++
++)))
++
  = 8. Packing Info =
  )))
@@ -1701,6 +1701,8 @@
  * Device Weight: 105g
  * Package Size / pcs : 14.5 x 8 x 5 cm
  * Weight / pcs : 170g
++
++
  )))
  )))
@@ -1722,6 +1722,8 @@
  (((
  (((
           [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
++
++
  )))
  (((

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