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

Last modified by Kilight Cao on 2025/07/03 15:34

From 52.1 to 51.2 From 57.3 to 57.2

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edited by Kilight Cao
on 2025/07/03 15:28

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edited by Kilight Cao
on 2025/07/03 14:56

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@@ -171,7 +171,7 @@
  == 2.3 Connecting LT-22222-LA to a Power Source ==
--The LT-22222-LA 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.
++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}}
  **We recommend that you power on the LT-22222-LA after adding its registration information to the LoRaWAN network server. Otherwise, the device will continuously send join-request messages to attempt to join a LoRaWAN network but will fail.**
@@ -506,9 +506,6 @@
--
--
--
  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
@@ -547,9 +547,6 @@
--
--
--
  (((
  **To activate this mode, run the following AT commands:**
  )))
@@ -644,9 +644,6 @@
--
--
--
  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
@@ -709,9 +709,6 @@
--
--
--
  === 3.3.6 AT+ADDMOD~=6 (Trigger Mode, Optional) ===
@@ -2292,9 +2292,6 @@
--
--
--
  (% style="color:blue" %)**Example 4**(%%): Connecting to a Dry Contact sensor
  From the DI port circuit above, activating the photocoupler requires a voltage difference between the DI+ and DI- ports. However, the Dry Contact sensor is a passive component and cannot provide this voltage difference on its own.
@@ -2424,26 +2424,25 @@
  (((
  You can use a USB-to-TTL adapter/converter along with a 3.5mm Program Cable to connect the LT-22222-LA to a PC, as shown below.
--(% title="Click and drag to resize" %)[[image:1751525987713-642.png]]
++(% title="Click and drag to resize" %)
  )))
  (((
--On the PC, you need to set the (% style="color:#4f81bd" %)**serial tool **(%%)(such as [[PuTTY>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]] or [[SecureCRT>>https://www.vandyke.com/cgi-bin/releases.php?product=securecrt]]) to a baud rate of (% style="color:green" %)**9600**(%%) to access the serial console of LT-22222-LA. Access to AT commands is disabled by default, and a password (default: (% style="color:green" %)**123456**)(%%) must be entered to enable AT command access, as shown below:
++On the PC, you need to set the (% style="color:#4f81bd" %)**serial tool **(%%)(such as [[PuTTY>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]] or [[SecureCRT>>https://www.vandyke.com/cgi-bin/releases.php?product=securecrt]]) to a baud rate of (% style="color:green" %)**9600**(%%) to access the serial console of LT-22222-L. Access to AT commands is disabled by default, and a password (default: (% style="color:green" %)**123456**)(%%) must be entered to enable AT command access, as shown below:
  )))
--[[image:1653358355238-883.png]]
  (((
--== 4.2 LT-22222-LA related AT commands ==
++== 4.2 LT-22222-L related AT commands ==
  )))
  (((
--The following is the list of all the AT commands related to the LT-22222-LA, except for those used for switching between working modes.
++The following is the list of all the AT commands related to the LT-22222-L, except for those used for switching between working modes.
  * **##AT##+<CMD>?** : Help on <CMD>
  * **##AT##+<CMD>** : Run <CMD>
@@ -2540,11 +2540,85 @@
  )))
++=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
++
  (((
++
++(((
++(% style="background-color:#dcdcdc" %)**123456**(%%)        ~/~/ Enter the password to enable AT commands access
  )))
++)))
++(((
++(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)     ~/~/ Reset parameters to Factory Default, Reserve keys
++)))
++(((
++(% style="background-color:#dcdcdc" %)** 123456**(%%)       ~/~/ Enter the password to enable AT command access
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)   ~/~/ Set to CLASS C mode
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)     ~/~/ Set to ABP mode
++)))
++
++(((
++(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)     ~/~/ Set the Adaptive Data Rate Off
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)       ~/~/ Set Data Rate
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)              ~/~/ Set transmit interval to 60 seconds
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)     ~/~/ Set transmit frequency to 868.4 MHz
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)    ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** **                   ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** AT+DADDR=26 01 1A F1** (%%)     ~/~/ Set Device Address. The Device Address can be found in the application on the LoRaWAN NS.
++)))
++
++(((
++(% style="background-color:#dcdcdc" %)** ATZ**         (%%)                                 ~/~/ Reset MCU
++
++
++)))
++
++(((
++(% style="color:red" %)**Note:**
++)))
++
++(((
++**~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
++
++**2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
++
++**3. Make sure the SF/bandwidth settings in the LG01/LG02 match the settings of AT+DR. Refer to [[this link>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.**
++
++**4. The commands AT+RX2FQ and AT+RX2DR enable downlink functionality. To set the correct parameters, you can check the actual downlink parameters to be used as shown below. Here, RX2FQ should be set to 868400000 and RX2DR should be set to 5.**
++)))
++
++(((
++
++)))
++
++
  === 4.2.3 Change to Class A ===
@@ -2562,53 +2562,78 @@
  == 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>>https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/How%20to%20set%20up%20to%20count%20objects%20pass%20in%20flow%20line/]].
++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. OTA Firmware update =
++= 6. FAQ =
--(% class="wikigeneratedid" %)
--User can change firmware LT-22222-LA to:
++This section contains some frequently asked questions, which can help you resolve common issues and find solutions quickly.
--* Change Frequency band/ region.
--* Update with new features.
--* Fix bugs.
--Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/fis3g6nmhv0eokg/AAC6BcCZaX4BdqZkduUvZ3jIa?dl=0]]**
++== 6.1 How to update the firmware? ==
--Methods to Update Firmware:
++Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
--* (Recommanded way) OTA firmware update via wireless : **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]**
--* Update through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**.
++* Support new features
++* Fix bugs
++* Change LoRaWAN frequency bands
++You will need the following things before proceeding:
++* 3.5mm programming cable (included with the LT-22222-L as an additional accessory)
++* USB to TTL adapter/converter
++* Download and install the [[STM32 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]]. (replaced by STM32CubeProgrammer)
++* Download the latest firmware image from [[LT-22222-L firmware image files>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACrbrDN0AqLHbBat0ViWx5Da/LT-22222-L/Firmware?dl=0&subfolder_nav_tracking=1]]. Check the file name of the firmware to find the correct region.
--= 7. FAQ =
++{{info}}
++As of this writing, the latest firmware version available for the LT-22222-L is v1.6.1.
++{{/info}}
++Below is the hardware setup for uploading a firmware image to the LT-22222-L:
--This section contains some frequently asked questions, which can help you resolve common issues and find solutions quickly.
++Start the STM32 Flash Loader and choose the correct COM port to update.
  (((
  (((
--== 7.2 How to change the LoRaWAN frequency band/region? ==
++(% style="color:blue" %)**For LT-22222-L**(%%):
++Hold down the **PRO** button, then briefly press the **RST** button. The **DO1** LED will change from OFF to ON. When the **DO1** LED is ON, it indicates that the device is in firmware download mode.
++)))
++
  )))
++
++
++
++
++
++
++
++(% style="color:red" %)**Note**(%%): If you have lost the programming cable, you can make one from a 3.5 mm cable. The pin mapping is as follows:
++
++
++
++(((
++(((
++== 6.2 How to change the LoRaWAN frequency band/region? ==
++
++
  )))
++)))
  (((
--You can follow the introductions on [[how to upgrade the image>>doc:]]. When downloading, select the required image file.
++You can follow the introductions on [[how to upgrade the image>>||anchor="H6.1Howtoupdatethefirmware3F"]]. When downloading, select the required image file.
  )))
  (((
--== 7.3 How to set up LT-22222-LA to work with a Single Channel Gateway, such as LG01/LG02? ==
++== 6.3 How to set up LT-22222-L to work with a Single Channel Gateway, such as LG01/LG02? ==
  )))
@@ -2615,7 +2615,7 @@
  (((
  (((
--In this case, you need to set the LT-22222-LA to work in ABP mode and transmit on only one frequency.
++In this case, you need to set the LT-22222-L to work in ABP mode and transmit on only one frequency.
  )))
  )))
@@ -2638,12 +2638,12 @@
  )))
  {{warning}}
--Ensure that the Device Address (DevAddr) and the two keys match between the LT-22222-LA and The Things Stack. You can modify them either in The Things Stack or on the LT-22222-LA to make them align. In The Things Stack, you can configure the NwkSKey and AppSKey on the settings page, but note that the Device Address is generated by The Things Stack.
++Ensure that the Device Address (DevAddr) and the two keys match between the LT-22222-L and The Things Stack. You can modify them either in The Things Stack or on the LT-22222-L to make them align. In The Things Stack, you can configure the NwkSKey and AppSKey on the settings page, but note that the Device Address is generated by The Things Stack.
  {{/warning}}
  (((
--(% style="color:blue" %)**Step 2**(%%)**:  **(% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)Run AT commands to configure the LT-22222-LA to operate in single-frequency and ABP mode. The AT commands are as follows:
++(% style="color:blue" %)**Step 2**(%%)**:  **(% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)Run AT commands to configure the LT-22222-L to operate in single-frequency and ABP mode. The AT commands are as follows:
  )))
@@ -2679,7 +2679,6 @@
  (% style="color:#000000; font-family:Arial,sans-serif; font-size:11pt; font-style:normal; font-variant-alternates:normal; font-variant-east-asian:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-position:normal; font-weight:400; text-decoration:none; white-space:pre-wrap" %)The following figure shows the screenshot of the command set above, issued using a serial tool:
  )))
--[[image:1653360498588-932.png]]
  == 6.4 How to change the uplink interval? ==
@@ -2695,11 +2695,16 @@
  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.
++== 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]].
++
  )))
  (((
--== 6.6 Why does the relay output default to an open relay after the LT-22222-LA is powered off? ==
++== 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.
@@ -2707,19 +2707,23 @@
  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
  * After a restart, the status before the power failure will be read from Flash.
--== 6.7 Can I set up LT-22222-LA as an NC (Normally Closed) relay? ==
++== 6.8 Can I set up LT-22222-L as an NC (Normally Closed) relay? ==
--The LT-22222-LA'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:
++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:
--[[image:image-20221006170630-1.png]]
++== 6.9 Can the LT-22222-L save the RO state? ==
--== 6.8 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
++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.
@@ -2768,7 +2768,7 @@
  )))
--== 7.4 Why can the LT-22222-LA perform uplink normally, but cannot receive downlink? ==
++== 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.
@@ -2778,7 +2778,7 @@
  = 8. Ordering information =
--(% style="color:#4f81bd" %)**LT-22222-LA-XXX:**
++(% style="color:#4f81bd" %)**LT-22222-L-XXX:**
  (% style="color:#4f81bd" %)**XXX:**
@@ -2797,8 +2797,8 @@
  (% style="color:#037691" %)**Package Includes**:
--* 1 x LT-22222-LA I/O Controller
--* 1 x LoRa antenna matched to the frequency of the LT-22222-LA
++* 1 x LT-22222-L I/O Controller
++* 1 x LoRa antenna matched to the frequency of the LT-22222-L
  * 1 x bracket for DIN rail mounting
  * 1 x 3.5 mm programming cable
@@ -2822,6 +2822,6 @@
  = 11. Reference =
--* LT-22222-LA: [[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]]
++* 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]]

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

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