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Last modified by Mengting Qiu on 2025/07/29 15:24
From version 49.9
edited by Mengting Qiu
on 2025/07/29 14:15
Change comment: There is no comment for this version
To version 52.3
edited by Mengting Qiu
on 2025/07/29 15:22
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 Certificate Management for -NB/-NS Models ====
325 +==== 4.1.2.5 Clear Certificates by Overwriting (For -NB/-NS Modules) ====
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.
330 +To effectively remove existing certificates, users may overwrite them with dummy data.
331 331  
332 +
332 332  To effectively "clear" existing certificates, users may overwrite them with arbitrary data by following these steps:
333 333  
334 334  **Scenario A:** Clearing Existing Certificates
335 335  
336 -If users want to remove old certificates:
337 +1.Flash the certificate-provisioning firmware: **[[Set up TLS certificate - Dropbox>>https://www.dropbox.com/scl/fo/1ykfsesmr3702tj3kp663/AOOyH1GiVEOGR41gASuiDk0?rlkey=1q7a1b5yvjgt87d16w8tt0cum&st=vdy765ut&dl=0||data-sider-select-id="830d1b64-cb24-48b3-91e4-49da5c3f0783"]]**
337 337  
338 -
339 -
340 -
341 -Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
339 +2. Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
342 342  Example:
343 343  
344 344  AT+CACERT=123456}
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347 347  
348 348  AT+CLIKEY=123456}
349 349  
350 -2. Upload Valid Certificates (Optional):
351 351  
352 -After overwriting, users may proceed to upload new valid certificates if needed.
353 353  
350 +2. Check for success responses after each command:
354 354  
352 +[[image:1753772253801-330.png||height="495" width="620"]]
353 +
354 +* If you get "Failure", retry or check module connectivity.
355 +
356 +3. Later, when you have real certificates, overwrite the dummy data with actual certificates.
357 +
358 +
355 355  == 4.2  For -CB /-CS model ==
356 356  
357 357  === 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===
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