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Last modified by Mengting Qiu on 2025/07/29 15:24
From version 47.1
edited by Mengting Qiu
on 2025/05/20 15:54
Change comment: There is no comment for this version
To version 49.2
edited by Mengting Qiu
on 2025/07/29 13:58
Change comment: There is no comment for this version

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322 322  After completing the certificate configuration, Burn the [[bootloader>>https://www.dropbox.com/sh/u0uzvvnn58yrie4/AAAvvF_KRveNgmDejzp23ziLa/NB-IoT/Bootloader?dl=0&subfolder_nav_tracking=1]] firmware first, then re-burn the original working [[firmware>>https://www.dropbox.com/sh/u0uzvvnn58yrie4/AACREHllkTe0rATD4ZOqddyga/NB-IoT?dl=0]].
323 323  
324 324  
325 +==== 4.1.2.5 Overwriting Certificates on -NB/-NS Models ====
326 +
327 +
328 +The -NB/-NS modules (BC660K) do not support clearing certificates via AT commands or firmware updates.
329 +
330 +To effectively "clear" existing certificates, users may overwrite them with arbitrary data by following these steps:
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332 +
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334 +
325 325  == 4.2  For -CB /-CS model ==
326 326  
327 327  === 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===
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337 337  
338 338  Methods to Update Firmware:
339 339  
340 -* (Recommended way) OTA firmware update via BLE: [[**Instruction**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE_Firmware_Update_NB_Sensors_BC660K-GL/]].
341 -
342 342  * Update through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART_Access_for_NB_ST_BC660K-GL/#H4.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]]**.
343 343  
344 344  === 4.2.2 Configure certificate ===