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Last modified by Kilight Cao on 2025/07/03 15:34
From version 55.3
edited by Kilight Cao
on 2025/07/03 15:10
Change comment: There is no comment for this version
To version 53.2
edited by Kilight Cao
on 2025/07/03 15:01
Change comment: There is no comment for this version

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... ... @@ -2525,11 +2525,85 @@
2525 2525  )))
2526 2526  
2527 2527  
2528 +=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
2529 +
2528 2528  (((
2529 2529  
2532 +
2533 +(((
2534 +(% style="background-color:#dcdcdc" %)**123456**(%%)  ~/~/ Enter the password to enable AT commands access
2530 2530  )))
2536 +)))
2531 2531  
2538 +(((
2539 +(% style="background-color:#dcdcdc" %)** AT+FDR**(%%)  ~/~/ Reset parameters to Factory Default, Reserve keys
2540 +)))
2532 2532  
2542 +(((
2543 +(% style="background-color:#dcdcdc" %)** 123456**(%%)  ~/~/ Enter the password to enable AT command access
2544 +)))
2545 +
2546 +(((
2547 +(% style="background-color:#dcdcdc" %)** AT+CLASS=C**(%%)  ~/~/ Set to CLASS C mode
2548 +)))
2549 +
2550 +(((
2551 +(% style="background-color:#dcdcdc" %)** AT+NJM=0**(%%)  ~/~/ Set to ABP mode
2552 +)))
2553 +
2554 +(((
2555 +(% style="background-color:#dcdcdc" %) **AT+ADR=0**(%%)  ~/~/ Set the Adaptive Data Rate Off
2556 +)))
2557 +
2558 +(((
2559 +(% style="background-color:#dcdcdc" %)** AT+DR=5**(%%)  ~/~/ Set Data Rate
2560 +)))
2561 +
2562 +(((
2563 +(% style="background-color:#dcdcdc" %)** AT+TDC=60000**(%%)  ~/~/ Set transmit interval to 60 seconds
2564 +)))
2565 +
2566 +(((
2567 +(% style="background-color:#dcdcdc" %)** AT+CHS=868400000**(%%)  ~/~/ Set transmit frequency to 868.4 MHz
2568 +)))
2569 +
2570 +(((
2571 +(% style="background-color:#dcdcdc" %)** AT+RX2FQ=868400000**(%%)  ~/~/ Set RX2 frequency to 868.4 MHz (according to the result from the server)
2572 +)))
2573 +
2574 +(((
2575 +(% style="background-color:#dcdcdc" %)** AT+RX2DR=5**(%%)** ** ~/~/ Set RX2 DR to match the downlink DR from the server. See below.
2576 +)))
2577 +
2578 +(((
2579 +(% 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.
2580 +)))
2581 +
2582 +(((
2583 +(% style="background-color:#dcdcdc" %)** ATZ**         (%%) ~/~/ Reset MCU
2584 +
2585 +
2586 +)))
2587 +
2588 +(((
2589 +(% style="color:red" %)**Note:**
2590 +)))
2591 +
2592 +(((
2593 +**~1. Ensure that the device is set to ABP mode in the LoRaWAN Network Server.**
2594 +
2595 +**2. Verify that the LG01/02 gateway RX frequency matches the AT+CHS setting exactly.**
2596 +
2597 +**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.**
2598 +
2599 +**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.**
2600 +)))
2601 +
2602 +(((
2603 +
2604 +)))
2605 +
2606 +
2533 2533  === 4.2.3 Change to Class A ===
2534 2534  
2535 2535  
... ... @@ -2559,10 +2559,52 @@
2559 2559  == 6.1 How to update the firmware? ==
2560 2560  
2561 2561  
2636 +Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
2562 2562  
2638 +* Support new features
2639 +* Fix bugs
2640 +* Change LoRaWAN frequency bands
2563 2563  
2642 +You will need the following things before proceeding:
2643 +
2644 +* 3.5mm programming cable (included with the LT-22222-L as an additional accessory)
2645 +* USB to TTL adapter/converter
2646 +* 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)
2647 +* 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.
2648 +
2649 +{{info}}
2650 +As of this writing, the latest firmware version available for the LT-22222-L is v1.6.1.
2651 +{{/info}}
2652 +
2653 +Below is the hardware setup for uploading a firmware image to the LT-22222-L:
2654 +
2655 +
2656 +
2657 +
2658 +Start the STM32 Flash Loader and choose the correct COM port to update.
2659 +
2564 2564  (((
2565 2565  (((
2662 +(% style="color:blue" %)**For LT-22222-L**(%%):
2663 +
2664 +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.
2665 +)))
2666 +
2667 +
2668 +)))
2669 +
2670 +
2671 +
2672 +
2673 +
2674 +
2675 +
2676 +(% 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:
2677 +
2678 +
2679 +
2680 +(((
2681 +(((
2566 2566  == 6.2 How to change the LoRaWAN frequency band/region? ==
2567 2567  
2568 2568  
... ... @@ -2576,7 +2576,7 @@
2576 2576  (((
2577 2577  
2578 2578  
2579 -== 6.3 How to set up LT-22222-LA to work with a Single Channel Gateway, such as LG01/LG02? ==
2695 +== 6.3 How to set up LT-22222-L to work with a Single Channel Gateway, such as LG01/LG02? ==
2580 2580  
2581 2581  
2582 2582  )))
... ... @@ -2583,7 +2583,7 @@
2583 2583  
2584 2584  (((
2585 2585  (((
2586 -In this case, you need to set the LT-22222-LA to work in ABP mode and transmit on only one frequency.
2702 +In this case, you need to set the LT-22222-L to work in ABP mode and transmit on only one frequency.
2587 2587  )))
2588 2588  )))
2589 2589  
... ... @@ -2611,7 +2611,7 @@
2611 2611  
2612 2612  
2613 2613  (((
2614 -(% 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:
2730 +(% 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:
2615 2615  
2616 2616  
2617 2617  )))
... ... @@ -2647,7 +2647,6 @@
2647 2647  (% 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:
2648 2648  )))
2649 2649  
2650 -[[image:1653360498588-932.png]]
2651 2651  
2652 2652  
2653 2653  == 6.4 How to change the uplink interval? ==
... ... @@ -2663,11 +2663,16 @@
2663 2663  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.
2664 2664  
2665 2665  
2781 +== 6.6 Can I use point-to-point communication with LT-22222-L? ==
2782 +
2783 +
2784 +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]].
2785 +
2666 2666  
2667 2667  )))
2668 2668  
2669 2669  (((
2670 -== 6.6 Why does the relay output default to an open relay after the LT-22222-LA is powered off? ==
2790 +== 6.7 Why does the relay output default to an open relay after the LT-22222-L is powered off? ==
2671 2671  
2672 2672  
2673 2673  * If the device is not properly shut down and is directly powered off.
... ... @@ -2675,19 +2675,23 @@
2675 2675  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
2676 2676  * After a restart, the status before the power failure will be read from Flash.
2677 2677  
2678 -== 6.7 Can I set up LT-22222-LA as an NC (Normally Closed) relay? ==
2798 +== 6.8 Can I set up LT-22222-L as an NC (Normally Closed) relay? ==
2679 2679  
2680 2680  
2681 -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:
2801 +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:
2682 2682  
2683 -[[image:image-20221006170630-1.png]]
2684 2684  
2685 2685  
2686 2686  
2806 +== 6.9 Can the LT-22222-L save the RO state? ==
2687 2687  
2688 -== 6.8 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
2689 2689  
2809 +To enable this feature, the firmware version must be 1.6.0 or higher.
2690 2690  
2811 +
2812 +== 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
2813 +
2814 +
2691 2691  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
2692 2692  
2693 2693  
... ... @@ -2736,7 +2736,7 @@
2736 2736  )))
2737 2737  
2738 2738  
2739 -== 7.4 Why can the LT-22222-LA perform uplink normally, but cannot receive downlink? ==
2863 +== 7.4 Why can the LT-22222-L perform uplink normally, but cannot receive downlink? ==
2740 2740  
2741 2741  
2742 2742  The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue.
... ... @@ -2790,6 +2790,6 @@
2790 2790  = 11. Reference​​​​​ =
2791 2791  
2792 2792  
2793 -* 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]]
2917 +* 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]]
2794 2794  * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2795 2795  * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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