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

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

From 54.1 to 53.3 From 55.5 to 55.4

From version 55.4

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

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To version 54.1

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

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@@ -506,7 +506,6 @@
--
  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
@@ -545,7 +545,6 @@
--
  (((
  **To activate this mode, run the following AT commands:**
  )))
@@ -640,7 +640,6 @@
--
  === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
@@ -703,7 +703,6 @@
--
  === 3.3.6 AT+ADDMOD~=6 (Trigger Mode, Optional) ===
@@ -2284,7 +2284,6 @@
--
  (% 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.
@@ -2561,29 +2561,55 @@
  This section contains some frequently asked questions, which can help you resolve common issues and find solutions quickly.
--== 6.1 OTA Firmware update ==
++== 6.1 How to update the firmware? ==
--(% class="wikigeneratedid" %)
--User can change firmware LT-22222-LA to:
++Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
--* Change Frequency band/ region.
--* Update with new features.
--* Fix bugs.
++* Support new features
++* Fix bugs
++* Change LoRaWAN frequency bands
--Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/fis3g6nmhv0eokg/AAC6BcCZaX4BdqZkduUvZ3jIa?dl=0]]**
++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.
--Methods to Update Firmware:
++{{info}}
++As of this writing, the latest firmware version available for the LT-22222-L is v1.6.1.
++{{/info}}
--* (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]]**.
++Below is the hardware setup for uploading a firmware image to the LT-22222-L:
++Start the STM32 Flash Loader and choose the correct COM port to update.
++
  (((
  (((
++(% 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? ==
@@ -2597,7 +2597,7 @@
  (((
--== 6.3 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? ==
  )))
@@ -2604,7 +2604,7 @@
  (((
  (((
--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.
  )))
  )))
@@ -2632,7 +2632,7 @@
  (((
--(% 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:
  )))
@@ -2668,7 +2668,6 @@
  (% 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? ==
@@ -2684,11 +2684,16 @@
  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.
@@ -2696,19 +2696,23 @@
  * 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.
@@ -2757,7 +2757,7 @@
  )))
--== 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.
@@ -2767,7 +2767,7 @@
  = 8. Ordering information =
--(% style="color:#4f81bd" %)**LT-22222-LA-XXX:**
++(% style="color:#4f81bd" %)**LT-22222-L-XXX:**
  (% style="color:#4f81bd" %)**XXX:**
@@ -2786,8 +2786,8 @@
  (% 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
@@ -2811,6 +2811,6 @@
  = 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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