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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 55.2
edited by Kilight Cao
on 2025/07/03 15:07
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-LA**(%%):
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