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Last modified by Mengting Qiu on 2025/07/29 15:24
From version 49.5
edited by Mengting Qiu
on 2025/07/29 14:00
Change comment: There is no comment for this version
To version 49.10
edited by Mengting Qiu
on 2025/07/29 14:15
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 ====
325 +==== 4.1.2.5 Certificate Management for -NB/-NS Models ====
326 326  
327 327  
328 328  The -NB/-NS modules (BC660K) do not support clearing certificates via AT commands or firmware updates.
329 329  
330 +To effectively remove existing certificates or test certificate upload functionality, users may overwrite them with dummy data.
331 +
330 330  To effectively "clear" existing certificates, users may overwrite them with arbitrary data by following these steps:
331 331  
332 -1. Overwrite Certificates:
334 +**Scenario A:** Clearing Existing Certificates
333 333  
336 +If users want to remove old certificates:
337 +
338 +1. 
339 +Connect to the module via serial/USB and open a terminal (e.g., PuTTY, Tera Term).
340 +
341 +
342 +
334 334  Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
335 335  Example:
336 336  
... ... @@ -340,8 +340,11 @@
340 340  
341 341  AT+CLIKEY=123456}
342 342  
352 +2. Upload Valid Certificates (Optional):
343 343  
354 +After overwriting, users may proceed to upload new valid certificates if needed.
344 344  
356 +
345 345  == 4.2  For -CB /-CS model ==
346 346  
347 347  === 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===