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

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

From 230.10 to 230.11 From 230.12 to 230.13

From version 230.11

edited by Xiaoling
on 2024/12/09 10:06

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To version 230.12

edited by Xiaoling
on 2024/12/09 10:15

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  == 1.1 What is the LT-22222-L I/O Controller? ==
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  * Automatic RF Sense and CAD with ultra-fast AFC.
  * Packet engine up to 256 bytes with CRC.
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  == 1.3 Features ==
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  * LoRaWAN Class A & Class C modes
  * Optional Customized LoRa Protocol
  * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865/MA869
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  * Firmware upgradable via program port
  * Counting
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  == 1.4 Applications ==
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  * Smart buildings & home automation
  * Logistics and supply chain management
  * Smart metering
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  * Smart cities
  * Smart factory
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  == 1.5 Hardware Variants ==
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  |(% 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" %)(((
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  == 3.7 LED Indicators ==
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  The table below lists the behavior of LED indicators for each port function.
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  |**RO1**|For LT-22222-L: ON when RO1 is closed, OFF when RO1 is open
  |**RO2**|For LT-22222-L: ON when RO2 is closed, OFF when RO2 is open
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  = 4. Using AT Commands =
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  The LT-22222-L supports programming using AT Commands.
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  == 4.1 Connecting the LT-22222-L to a PC ==
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  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.
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  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/]]
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  == 4.2 LT-22222-L related AT commands ==
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  == 5.1 Counting how many objects pass through the flow line ==
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  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 =
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  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? ==
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  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
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  == 6.2 How to change the LoRaWAN frequency band/region? ==
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  == 6.3 How to setup LT-22222-L to work with a Single Channel Gateway, such as LG01/LG02? ==
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  == 6.4 How to change the uplink interval? ==
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  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? ==
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  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.
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  == 6.6 Can I use point-to-point communication with LT-22222-L? ==
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  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]].
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  == 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
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  * 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.
  * After a restart, the status before the power failure will be read from flash.
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  == 6.8 Can I setup LT-22222-L as a NC (Normally Closed) relay? ==
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  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:
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  == 6.9 Can the LT-22222-L save the RO state? ==
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  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? ==
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  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
  = 7. Troubleshooting =
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  This section provides some known troubleshooting tips.
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  == 7.1 Downlink isn't working. How can I solve this? ==
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  == 7.2 Having trouble uploading an image? ==
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  == 7.3 Why can't I join TTN in the US915 /AU915 bands? ==
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  == 7.4 Why can the LT-22222-L perform uplink normally, but cannot receive downlink? ==
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  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"]]
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  = 8. Ordering information =
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  (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
  (% style="color:#4f81bd" %)**XXX:**
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  * (% style="color:red" %)**IN865**(%%): LT with frequency bands IN865
  * (% style="color:red" %)**CN779**(%%): LT with frequency bands CN779
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  = 9. Package information =
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  **Package includes**:
  * 1 x LT-22222-L I/O Controller
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  * Package Size / pcs : 14.5 x 8 x 5 cm
  * Weight / pcs : 170 g
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  = 10. Support =
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  * (((
  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.
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  = 11. Reference =
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  * 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]]