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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
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To version 54.2
edited by Kilight Cao
on 2025/07/03 15:04
Change comment: There is no comment for this version

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2559 2559  == 6.1 How to update the firmware? ==
2560 2560  
2561 2561  
2562 +Dragino frequently releases firmware updates for the LT-22222-L. Updating your LT-22222-L with the latest firmware version helps to:
2562 2562  
2564 +* Support new features
2565 +* Fix bugs
2566 +* Change LoRaWAN frequency bands
2563 2563  
2568 +You will need the following things before proceeding:
2569 +
2570 +* 3.5mm programming cable (included with the LT-22222-L as an additional accessory)
2571 +* USB to TTL adapter/converter
2572 +* 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)
2573 +* 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.
2574 +
2575 +{{info}}
2576 +As of this writing, the latest firmware version available for the LT-22222-L is v1.6.1.
2577 +{{/info}}
2578 +
2579 +Below is the hardware setup for uploading a firmware image to the LT-22222-L:
2580 +
2581 +
2582 +
2583 +
2584 +Start the STM32 Flash Loader and choose the correct COM port to update.
2585 +
2564 2564  (((
2565 2565  (((
2588 +(% style="color:blue" %)**For LT-22222-L**(%%):
2589 +
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 +)))
2592 +
2593 +
2594 +)))
2595 +
2596 +
2597 +
2598 +
2599 +
2600 +
2601 +
2602 +(% 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:
2603 +
2604 +
2605 +
2606 +(((
2607 +(((
2566 2566  == 6.2 How to change the LoRaWAN frequency band/region? ==
2567 2567  
2568 2568  
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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? ==
2621 +== 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.
2628 +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  
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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:
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-L to operate in single-frequency and ABP mode. The AT commands are as follows:
2615 2615  
2616 2616  
2617 2617  )))
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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? ==
... ... @@ -2685,7 +2685,7 @@
2685 2685  
2686 2686  
2687 2687  
2688 -== 6.8 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
2729 +== 6.9 Why does the LT-22222-LA always report 15.585V when measuring the AVI? ==
2689 2689  
2690 2690  
2691 2691  It is likely that the GND is not connected during the measurement, or that the wire connected to the GND is loose.
... ... @@ -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? ==
2780 +== 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]]
2834 +* 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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