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

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

From 230.8 to 230.9 From 230.16 to 231.1

From version 230.9

edited by Xiaoling
on 2024/12/09 09:56

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To version 230.16

edited by Xiaoling
on 2024/12/09 10:58

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@@ -21,6 +21,7 @@
  == 1.1 What is the LT-22222-L I/O Controller? ==
++
  (((
  (((
  {{info}}
@@ -99,6 +99,7 @@
  == 1.3 Features ==
++
  * LoRaWAN Class A & Class C modes
  * Optional Customized LoRa Protocol
  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
@@ -109,6 +109,7 @@
  == 1.4 Applications ==
++
  * Smart buildings & home automation
  * Logistics and supply chain management
  * Smart metering
@@ -119,11 +119,11 @@
  == 1.5 Hardware Variants ==
--(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
++(% border="1" cellspacing="3" style="width:510px" %)
  |(% style="background-color:#4f81bd; color:white; width:94px" %)**Model**|(% style="background-color:#4f81bd; color:white; width:172px" %)**Photo**|(% style="background-color:#4f81bd; color:white; width:244px" %)**Description**
  |(% style="width:94px" %)**LT-22222-L**|(% style="width:172px" %)(((
  (% style="text-align:center" %)
--[[image:lt33222-l.jpg||height="116" width="100"]]
++[[image:lt33222-l.jpg||height="110" width="95"]]
  )))|(% style="width:256px" %)(((
  * 2 x Digital Input (Bi-direction)
  * 2 x Digital Output
@@ -137,6 +137,7 @@
  == 2.1 Connecting the antenna ==
++
  Connect the LoRa antenna to the antenna connector, **ANT**,** **located on the top right side of the device, next to the upper screw terminal block. Secure the antenna by tightening it clockwise.
  {{warning}}
@@ -143,38 +143,42 @@
  **Warning! Do not power on the device without connecting the antenna.**
  {{/warning}}
++
  == 2.2 Terminals ==
++
  The  LT-22222-L has two screw terminal blocks. The upper screw treminal block has 6 screw terminals and the lower screw terminal block has 10 screw terminals.
  **Upper screw terminal block (from left to right):**
--(% style="width:634px" %)
--|=(% style="width: 295px;" %)Screw Terminal|=(% style="width: 338px;" %)Function
--|(% style="width:295px" %)GND|(% style="width:338px" %)Ground
--|(% style="width:295px" %)VIN|(% style="width:338px" %)Input Voltage
--|(% style="width:295px" %)AVI2|(% style="width:338px" %)Analog Voltage Input Terminal 2
--|(% style="width:295px" %)AVI1|(% style="width:338px" %)Analog Voltage Input Terminal 1
--|(% style="width:295px" %)ACI2|(% style="width:338px" %)Analog Current Input Terminal 2
--|(% style="width:295px" %)ACI1|(% style="width:338px" %)Analog Current Input Terminal 1
++(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:381px" %)
++|=(% style="width: 139px;background-color:#4f81bd;color:white" %)Screw Terminal|=(% style="width: 242px;background-color:#4f81bd;color:white" %)Function
++|(% style="width:139px" %)GND|(% style="width:242px" %)Ground
++|(% style="width:139px" %)VIN|(% style="width:242px" %)Input Voltage
++|(% style="width:139px" %)AVI2|(% style="width:242px" %)Analog Voltage Input Terminal 2
++|(% style="width:139px" %)AVI1|(% style="width:242px" %)Analog Voltage Input Terminal 1
++|(% style="width:139px" %)ACI2|(% style="width:242px" %)Analog Current Input Terminal 2
++|(% style="width:139px" %)ACI1|(% style="width:242px" %)Analog Current Input Terminal 1
  **Lower screw terminal block (from left to right):**
--(% style="width:633px" %)
--|=(% style="width: 296px;" %)Screw Terminal|=(% style="width: 334px;" %)Function
--|(% style="width:296px" %)RO1-2|(% style="width:334px" %)Relay Output 1
--|(% style="width:296px" %)RO1-1|(% style="width:334px" %)Relay Output 1
--|(% style="width:296px" %)RO2-2|(% style="width:334px" %)Relay Output 2
--|(% style="width:296px" %)RO2-1|(% style="width:334px" %)Relay Output 2
--|(% style="width:296px" %)DI2+|(% style="width:334px" %)Digital Input 2
--|(% style="width:296px" %)DI2-|(% style="width:334px" %)Digital Input 2
--|(% style="width:296px" %)DI1+|(% style="width:334px" %)Digital Input 1
--|(% style="width:296px" %)DI1-|(% style="width:334px" %)Digital Input 1
--|(% style="width:296px" %)DO2|(% style="width:334px" %)Digital Output 2
--|(% style="width:296px" %)DO1|(% style="width:334px" %)Digital Output 1
++(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:253px" %)
++|=(% style="width: 125px;background-color:#4f81bd;color:white" %)Screw Terminal|=(% style="width: 128px;background-color:#4f81bd;color:white" %)Function
++|(% style="width:125px" %)RO1-2|(% style="width:128px" %)Relay Output 1
++|(% style="width:125px" %)RO1-1|(% style="width:128px" %)Relay Output 1
++|(% style="width:125px" %)RO2-2|(% style="width:128px" %)Relay Output 2
++|(% style="width:125px" %)RO2-1|(% style="width:128px" %)Relay Output 2
++|(% style="width:125px" %)DI2+|(% style="width:128px" %)Digital Input 2
++|(% style="width:125px" %)DI2-|(% style="width:128px" %)Digital Input 2
++|(% style="width:125px" %)DI1+|(% style="width:128px" %)Digital Input 1
++|(% style="width:125px" %)DI1-|(% style="width:128px" %)Digital Input 1
++|(% style="width:125px" %)DO2|(% style="width:128px" %)Digital Output 2
++|(% style="width:125px" %)DO1|(% style="width:128px" %)Digital Output 1
++
  == 2.3 Connecting LT-22222-L to a Power Source ==
++
  The LT-22222-L I/O Controller can be powered by a **7–24V DC** power source. Connect your power supply’s **positive wire** to the **VIN** and the **negative wire** to the **GND** screw terminals. The power indicator **(PWR) LED** will turn on when the device is properly powered.
  {{warning}}
@@ -187,11 +187,13 @@
  = 3. Registering LT-22222-L with a LoRaWAN Network Server =
++
  The LT-22222-L supports both OTAA (Over-the-Air Activation) and ABP (Activation By Personalization) methods to activate with a LoRaWAN Network Server. However, OTAA is the most secure method for activating a device with a LoRaWAN Network Server. OTAA regenerates session keys upon initial registration and regenerates new session keys after any subsequent reboots. By default, the LT-22222-L is configured to operate in LoRaWAN Class C mode.
  === 3.2.1 Prerequisites ===
++
  The LT-22222-L comes with device registration information such as DevEUI, AppEUI, and AppKey that allows you to register it with a LoRaWAN network. These registration information can be found on a sticker that can be found inside the package. Please keep the **registration information** sticker in a safe place for future reference.
  [[image:image-20230425173427-2.png||height="246" width="530"]]
@@ -202,8 +202,10 @@
  The following subsections explain how to register the LT-22222-L with different LoRaWAN network server providers.
++
  === 3.2.2 The Things Stack ===
++
  This section guides you through how to register your LT-22222-L with The Things Stack Sandbox.
  {{info}}
@@ -214,7 +214,7 @@
  The network diagram below illustrates the connection between the LT-22222-L and The Things Stack, as well as how the data can be integrated with the ThingsEye IoT platform.
--[[image:dragino-lorawan-nw-lt-22222-n.jpg]]
++[[image:dragino-lorawan-nw-lt-22222-n.jpg||height="374" width="1400"]]
  {{info}}
   You can use a LoRaWAN gateway, such as the [[Dragino LPS8N>>https://www.dragino.com/products/lora-lorawan-gateway/item/200-lps8n.html]], to expand or create LoRaWAN coverage in your area.
@@ -223,6 +223,7 @@
  ==== 3.2.2.1 Setting up ====
++
  * Sign up for a free account with [[The Things Stack Sandbox>>https://eu1.cloud.thethings.network]] if you do not have one yet.
  * Log in to your The Things Stack Sandbox account.
  * Create an **application** with The Things Stack if you do not have one yet (E.g., dragino-docs).
@@ -229,8 +229,10 @@
  * Go to your application's page and click on the **End devices** in the left menu.
  * On the End devices page, click on **+ Register end device**. Two registration options are available:
++
  ==== 3.2.2.2 Using the LoRaWAN Device Repository ====
++
  * On the **Register end device** page:
  ** Select the option **Select the end device in the LoRaWAN Device Repository **under **Input method**.
  ** Select the **End device brand**, **Model**, **Hardware version**, **Firmware version**, and **Profile (Region)** from the respective dropdown lists.
@@ -256,6 +256,7 @@
  ==== 3.2.2.3 Adding device manually ====
++
  * On the **Register end device** page:
  ** Select the option **Enter end device specifies manually** under **Input method**.
  ** Select the **Frequency plan** that matches your device from the **Frequency plan** dropdown list.
@@ -287,6 +287,7 @@
  ==== 3.2.2.4 Joining ====
++
  On the Device's page, click on **Live data** tab. The Live data panel for your device will display.
  Now power on your LT-22222-L. The **TX LED** will **fast-blink 5 times** which means the LT-22222-L will enter the **work mode** and start to **join** The Things Stack network server. The **TX LED** will be on for **5 seconds** after joining the network. In the **Live data** panel, you can see the **join-request** and **join-accept** messages exchanged between the device and the network server.
@@ -295,7 +295,6 @@
  [[image:lt-22222-l-joining.png]]
--
  ==== 3.2.2.5 Uplinks ====
@@ -323,6 +323,7 @@
  ==== 3.2.2.6 Downlinks ====
++
  When the LT-22222-L receives a downlink message from the server, the **RX LED** turns on for **1 second**.
@@ -345,8 +345,10 @@
  The uplink messages are sent over LoRaWAN FPort=2. By default, an uplink message is sent every 10 minutes.
++
  === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
++
  (((
  This is the default mode.
@@ -419,6 +419,7 @@
  MOD = 1
++
  === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
@@ -497,6 +497,7 @@
  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
++
  (% style="color:red" %)**Note: The maximum count depends on the bytes it is.
  The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
  It starts counting again when it reaches the maximum value.**
@@ -550,6 +550,7 @@
  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
++
  (% style="color:red" %)**Note:The maximum count depends on the bytes it is.
  The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
  It starts counting again when it reaches the maximum value.**
@@ -619,6 +619,7 @@
  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
++
  (% style="color:red" %)**Note:The maximum count depends on the bytes it is.
  The maximum count for four bytes is FFFFFFFF (hex) = 4294967295 (dec).
  It starts counting again when it reaches the maximum value.**
@@ -836,7 +836,7 @@
  (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
  (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:515px" %)
--|(% style="width:50px" %)**bit 7**|(% style="width:50px" %)**bit 6**|(% style="width:50px" %)**bit 5**|(% style="width:50px" %)**bit 4**|(% style="width:90px" %)**bit 3**|(% style="width:85px" %)**bit 2**|(% style="width:90px" %)**bit 1**|(% style="width:90px" %)**bit 0**
++|(% style="width:50px" %)**bit 7**|(% style="width:50px" %)**bit 6**|(% style="width:50px" %)**bit 5**|(% style="width:50px" %)**bit 4**|(% style="width:90px" %)**bit 3**|(% style="width:80px" %)**bit 2**|(% style="width:90px" %)**bit 1**|(% style="width:95px" %)**bit 0**
  |(% style="width:49px" %)N/A|(% style="width:53px" %)N/A|(% style="width:53px" %)N/A|(% style="width:55px" %)N/A|(% style="width:99px" %)DI2_STATUS|(% style="width:83px" %)DI2_FLAG|(% style="width:98px" %)DI1_STATUS|(% style="width:85px" %)DI1_FLAG
  * Each bit shows which status has been triggered on this uplink.
@@ -868,6 +868,7 @@
  == 3.4 Configure LT-22222-L via AT Commands or Downlinks ==
++
  (((
  You can configure LT-22222-L I/O Controller via AT Commands or LoRaWAN Downlinks.
  )))
@@ -882,19 +882,25 @@
  * (% style="color:blue" %)**Sensor-related commands**(%%):
++
  === 3.4.1 Common commands ===
++
  (((
  These are available for each sensors and include actions such as changing the uplink interval or resetting the device. For firmware v1.5.4, you can find the supported common commands under: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]s.
++
++
  )))
  === 3.4.2 Sensor-related commands ===
++
  These commands are specially designed for the LT-22222-L. Commands can be sent to the device using options such as an AT command or a LoRaWAN downlink payload.
  ==== 3.4.2.1 Set Transmit/Uplink Interval ====
++
  Sets the uplink interval of the device. The default uplink transmission interval is 10 minutes.
  (% style="color:#037691" %)**AT command**
@@ -941,6 +941,7 @@
  ==== 3.4.2.2 Set the Working Mode (AT+MOD) ====
++
  Sets the working mode.
  (% style="color:#037691" %)**AT command**
@@ -998,6 +998,7 @@
  ==== 3.4.2.3 Request an uplink from the device ====
++
  Requests an uplink from LT-22222-L. The content of the uplink payload varies based on the device's current working mode.
  (% style="color:#037691" %)**AT command**
@@ -1017,6 +1017,7 @@
  ==== 3.4.2.4 Enable/Disable Trigger Mode ====
++
  Enable or disable the trigger mode for the current working mode (see also [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]).
  (% style="color:#037691" %)**AT Command**
@@ -1054,6 +1054,7 @@
  ==== 3.4.2.5 Request trigger settings ====
++
  Requests the trigger settings.
  (% style="color:#037691" %)**AT Command:**
@@ -1073,6 +1073,7 @@
  ==== 3.4.2.6 Enable/Disable DI1/DI2/DI3 as a trigger ====
++
  Enable or disable DI1/DI2/DI3 as a trigger.
  (% style="color:#037691" %)**AT Command**
@@ -1127,9 +1127,9 @@
  ==== 3.4.2.7 Trigger1 – Set DI or DI3 as a trigger ====
++
  Sets DI1 or DI3 (for LT-33222-L) as a trigger.
--
  (% style="color:#037691" %)**AT Command**
  (% border="2" style="width:500px" %)
@@ -1166,9 +1166,9 @@
  ==== 3.4.2.8 Trigger2 – Set DI2 as a trigger ====
++
  Sets DI2 as a trigger.
--
  (% style="color:#037691" %)**AT Command**
  (% border="2" style="width:500px" %)
@@ -1200,6 +1200,7 @@
  ==== 3.4.2.9 Trigger – Set AC (current) as a trigger ====
++
  Sets the current trigger based on the AC port. See also [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
  (% style="color:#037691" %)**AT Command**
@@ -1249,6 +1249,7 @@
  ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
++
  Sets the current trigger based on the AV port. See also [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
  (% style="color:#037691" %)**AT Command**
@@ -1296,6 +1296,7 @@
  ==== 3.4.2.11 Trigger – Set minimum interval ====
++
  Sets the AV and AC trigger minimum interval. The device won't respond to a second trigger within this set time after the first trigger.
  (% style="color:#037691" %)**AT Command**
@@ -1331,6 +1331,7 @@
  ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
++
  Controls the digital outputs DO1, DO2, and DO3
  (% style="color:#037691" %)**AT Command**
@@ -1493,6 +1493,7 @@
  ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
++
  Controls the relay output time.
  * (% style="color:#037691" %)**AT Command:**
@@ -1692,6 +1692,7 @@
  ==== 3.4.2.19 Counting ~-~- Set Saving Interval for 'Counting Result' ====
++
  This command allows you to configure the device to save its counting result to internal flash memory at specified intervals. By setting a save time, the device will periodically store the counting data to prevent loss in case of power failure. The save interval can be adjusted to suit your requirements, with a minimum value of 30 seconds.
  (% style="color:#037691" %)**AT Command**
@@ -1723,6 +1723,7 @@
  ==== 3.4.2.20 Reset saved RO and DO states ====
++
  This command allows you to reset the saved relay output (RO) and digital output (DO) states when the device joins the network. By configuring this setting, you can control whether the device should retain or reset the relay states after a reset and rejoin to the network.
  (% style="color:#037691" %)**AT Command**
@@ -1772,6 +1772,7 @@
  ==== 3.4.2.21 Encrypted payload ====
++
  This command allows you to configure whether the device should upload data in an encrypted format or in plaintext. By default, the device encrypts the payload before uploading. You can toggle this setting to either upload encrypted data or transmit it without encryption.
  (% style="color:#037691" %)**AT Command:**
@@ -1801,6 +1801,7 @@
  ==== 3.4.2.22 Get sensor value ====
++
  This command allows you to retrieve and optionally uplink sensor readings through the serial port.
  (% style="color:#037691" %)**AT Command**
@@ -1830,6 +1830,7 @@
  ==== 3.4.2.23 Resetting the downlink packet count ====
++
  This command manages how the node handles mismatched downlink packet counts. It offers two modes: one disables the reception of further downlink packets if discrepancies occur, while the other resets the downlink packet count to align with the server, ensuring continued communication.
  (% style="color:#037691" %)**AT Command**
@@ -1908,6 +1908,7 @@
  ==== 3.4.2.25 Copy downlink to uplink ====
++
  This command enables the device to immediately uplink the payload of a received downlink packet back to the server. The command allows for quick data replication from downlink to uplink, with a fixed port number of 100.
  (% style="color:#037691" %)**AT Command**(%%)**:**
@@ -1933,6 +1933,7 @@
  ==== 3.4.2.26 Query firmware version, frequency band, sub band, and TDC time ====
++
  This command is used to query key information about the device, including its firmware version, frequency band, sub band, and TDC time. By sending the specified payload as a downlink, the server can retrieve this essential data from the device.
  * (((
@@ -1951,10 +1951,13 @@
  == 3.5 Integrating with ThingsEye.io ==
++
  The Things Stack application supports integration with ThingsEye.io. Once integrated, ThingsEye.io acts as an MQTT client for The Things Stack MQTT broker, allowing it to subscribe to upstream traffic and publish downlink traffic.
++
  === 3.5.1 Configuring The Things Stack ===
++
  We use The Things Stack Sandbox in this example:
  * In **The Things Stack Sandbox**, go to the **Application **for the LT-22222-L you added.
@@ -1968,8 +1968,10 @@
  [[image:tts-mqtt-integration.png]]
++
  === 3.5.2 Configuring ThingsEye.io ===
++
  The ThingsEye.io IoT platform is not open for self-registration at the moment. If you are interested in testing the platform, please send your project information to admin@thingseye.io, and we will create an account for you.
  * Login to your [[ThingsEye.io >>https://thingseye.io]]account.
@@ -2039,6 +2039,7 @@
  ==== 3.5.2.1 Viewing integration details ====
++
  Click on your integration from the list. The **Integration details** window will appear with the **Details **tab selected. The **Details **tab shows all the settings you have provided for this integration.
  [[image:integration-details.png]]
@@ -2050,8 +2050,10 @@
  See also [[ThingsEye documentation>>https://wiki.thingseye.io/xwiki/bin/view/Main/]].
  {{/info}}
--==== **3.5.2.2 Viewing events** ====
++==== 3.5.2.2 Viewing events ====
++
++
  The **Events **tab displays all the uplink messages from the LT-22222-L.
  * Select **Debug **from the **Event type** dropdown.
@@ -2065,13 +2065,15 @@
  [[image:thingseye-json.png]]
--==== **3.5.2.3 Deleting an integration** ====
++==== 3.5.2.3 Deleting an integration ====
++
  If you want to delete an integration, click the **Delete integratio**n button on the Integrations page.
  ==== 3.5.2.4 Creating a Dashboard to Display and Analyze LT-22222-L Data ====
++
  This will be added soon.
@@ -2288,6 +2288,7 @@
  == 3.7 LED Indicators ==
++
  The table below lists the behavior of LED indicators for each port function.
  (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
@@ -2320,10 +2320,13 @@
  = 4. Using AT Commands =
++
  The LT-22222-L supports programming using AT Commands.
++
  == 4.1 Connecting the LT-22222-L to a PC ==
++
  (((
  You can use a USB-to-TTL adapter/converter along with a 3.5mm Program Cable to connect the LT-22222-L to a PC, as shown below.
@@ -2343,7 +2343,10 @@
  (((
  You can find more details in the [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
++
  == 4.2 LT-22222-L related AT commands ==
++
++
  )))
  (((
@@ -2540,16 +2540,19 @@
  == 5.1 Counting how many objects pass through the flow line ==
++
  See [[How to set up to setup counting for objects passing through the flow line>>How to set up to count objects pass in flow line]]?
  = 6. FAQ =
++
  This section contains some frequently asked questions, which can help you resolve common issues and find solutions quickly.
  == 6.1 How to update the firmware? ==
++
  Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
  * Support new features
@@ -2602,6 +2602,8 @@
  (((
  (((
  == 6.2 How to change the LoRaWAN frequency band/region? ==
++
++
  )))
  )))
@@ -2613,6 +2613,8 @@
  == 6.3 How to setup LT-22222-L to work with a Single Channel Gateway, such as LG01/LG02? ==
++
++
  )))
  (((
@@ -2686,11 +2686,13 @@
  == 6.4 How to change the uplink interval? ==
++
  Please see this link: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20set%20the%20transmit%20time%20interval/]]
  == 6.5 Can I see the counting event in the serial output? ==
++
  (((
  You can run the AT command **AT+DEBUG** to view the counting event in the serial output. If the firmware is too old and doesn’t support AT+DEBUG, update to the latest firmware first.
@@ -2697,6 +2697,7 @@
  == 6.6 Can I use point-to-point communication with LT-22222-L? ==
++
  Yes, you can. Please refer to the [[Point-to-Point Communication of LT-22222-L>>https://wiki.dragino.com/xwiki/bin/view/Main/%20Point%20to%20Point%20Communication%20of%20LT-22222-L/]] page. The firmware that supports point-to-point communication can be found [[here>>https://github.com/dragino/LT-22222-L/releases]].
@@ -2705,6 +2705,7 @@
  (((
  == 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
++
  * If the device is not properly shut down and is directly powered off.
  * It will default to a power-off state.
  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
@@ -2712,6 +2712,7 @@
  == 6.8 Can I setup LT-22222-L as a NC (Normally Closed) relay? ==
++
  The LT-22222-L's built-in relay is Normally Open (NO). You can use an external relay to achieve a Normally Closed (NC) configuration. The circuit diagram is shown below:
@@ -2720,16 +2720,19 @@
  == 6.9 Can the LT-22222-L save the RO state? ==
++
  To enable this feature, the firmware version must be 1.6.0 or higher.
  == 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
++
  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
  = 7. Troubleshooting =
++
  This section provides some known troubleshooting tips.
@@ -2738,6 +2738,8 @@
  (((
  (((
  == 7.1 Downlink isn't working. How can I solve this? ==
++
++
  )))
  )))
@@ -2749,6 +2749,8 @@
  == 7.2 Having trouble uploading an image? ==
++
++
  )))
  (((
@@ -2759,6 +2759,8 @@
  == 7.3 Why can't I join TTN in the US915 /AU915 bands? ==
++
++
  )))
  (((
@@ -2768,6 +2768,7 @@
  == 7.4 Why can the LT-22222-L perform uplink normally, but cannot receive downlink? ==
++
  The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue.
  Use this command to synchronize their counts: [[Resets the downlink packet count>>||anchor="H3.4.2.23Resetsthedownlinkpacketcount"]]
@@ -2774,6 +2774,7 @@
  = 8. Ordering information =
++
  (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
  (% style="color:#4f81bd" %)**XXX:**
@@ -2790,6 +2790,7 @@
  = 9. Package information =
++
  **Package includes**:
  * 1 x LT-22222-L I/O Controller
@@ -2806,6 +2806,7 @@
  = 10. Support =
++
  * (((
  Support is available Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different time zones, we cannot offer live support. However, your questions will be answered as soon as possible within the aforementioned schedule.
  )))
@@ -2817,6 +2817,7 @@
  = 11. Reference =
++
  * LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
  * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
  * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]