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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
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To version 55.3
edited by Kilight Cao
on 2025/07/03 15:10
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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:
2563 2563  
2564 -* Support new features
2565 -* Fix bugs
2566 -* Change LoRaWAN frequency bands
2567 2567  
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 -
2586 2586  (((
2587 2587  (((
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 -(((
2608 2608  == 6.2 How to change the LoRaWAN frequency band/region? ==
2609 2609  
2610 2610