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Last modified by Kilight Cao on 2025/07/03 15:34
From version 55.2
edited by Kilight Cao
on 2025/07/03 15:07
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  
... ... @@ -2585,7 +2585,7 @@
2585 2585  
2586 2586  (((
2587 2587  (((
2588 -(% style="color:blue" %)**For LT-22222-LA**(%%):
2662 +(% style="color:blue" %)**For LT-22222-L**(%%):
2589 2589  
2590 2590  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.
2591 2591  )))
... ... @@ -2618,7 +2618,7 @@
2618 2618  (((
2619 2619  
2620 2620  
2621 -== 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? ==
2622 2622  
2623 2623  
2624 2624  )))
... ... @@ -2625,7 +2625,7 @@
2625 2625  
2626 2626  (((
2627 2627  (((
2628 -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.
2629 2629  )))
2630 2630  )))
2631 2631  
... ... @@ -2653,7 +2653,7 @@
2653 2653  
2654 2654  
2655 2655  (((
2656 -(% 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:
2657 2657  
2658 2658  
2659 2659  )))
... ... @@ -2689,7 +2689,6 @@
2689 2689  (% 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:
2690 2690  )))
2691 2691  
2692 -[[image:1653360498588-932.png]]
2693 2693  
2694 2694  
2695 2695  == 6.4 How to change the uplink interval? ==
... ... @@ -2705,11 +2705,16 @@
2705 2705  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.
2706 2706  
2707 2707  
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 +
2708 2708  
2709 2709  )))
2710 2710  
2711 2711  (((
2712 -== 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? ==
2713 2713  
2714 2714  
2715 2715  * If the device is not properly shut down and is directly powered off.
... ... @@ -2717,19 +2717,23 @@
2717 2717  * In modes 2 to 5, the DO/RO status and pulse count are saved to flash memory.
2718 2718  * After a restart, the status before the power failure will be read from Flash.
2719 2719  
2720 -== 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? ==
2721 2721  
2722 2722  
2723 -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:
2724 2724  
2725 -[[image:image-20221006170630-1.png]]
2726 2726  
2727 2727  
2728 2728  
2806 +== 6.9 Can the LT-22222-L save the RO state? ==
2729 2729  
2730 -== 6.8 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
2731 2731  
2809 +To enable this feature, the firmware version must be 1.6.0 or higher.
2732 2732  
2811 +
2812 +== 6.10 Why does the LT-22222-L always report 15.585V when measuring the AVI? ==
2813 +
2814 +
2733 2733  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
2734 2734  
2735 2735  
... ... @@ -2778,7 +2778,7 @@
2778 2778  )))
2779 2779  
2780 2780  
2781 -== 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? ==
2782 2782  
2783 2783  
2784 2784  The FCD count of the gateway is inconsistent with the FCD count of the node, causing the downlink to remain in the queue.
... ... @@ -2832,6 +2832,6 @@
2832 2832  = 11. Reference​​​​​ =
2833 2833  
2834 2834  
2835 -* 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]]
2836 2836  * [[Datasheet, Document Base>>https://www.dropbox.com/sh/gxxmgks42tqfr3a/AACEdsj_mqzeoTOXARRlwYZ2a?dl=0]]
2837 2837  * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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