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Last modified by Mengting Qiu on 2025/07/29 15:24
From version 52.4
edited by Mengting Qiu
on 2025/07/29 15:23
Change comment: There is no comment for this version
To version 52.5
edited by Mengting Qiu
on 2025/07/29 15:24
Change comment: There is no comment for this version

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329 329  
330 330  To effectively remove existing certificates, users may overwrite them with dummy data.
331 331  
332 -
333 -To effectively "clear" existing certificates, users may overwrite them with arbitrary data by following these steps:
334 -
335 -**Scenario A:** Clearing Existing Certificates
336 -
337 337  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"]]**
338 338  
339 339  2. Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
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345 345  
346 346  AT+CLIKEY=123456}
347 347  
343 +3. Check for success responses after each command:
348 348  
345 +[[image:1753772253801-330.png||height="495" width="620"]]
349 349  
350 -2. Check for success responses after each command:[[image:1753772253801-330.png||height="495" width="620"]]
347 +(If you get "Failure", retry or check module connectivity.)
351 351  
352 -* If you get "Failure", retry or check module connectivity.
353 353  
354 -3. Later, when you have real certificates, overwrite the dummy data with actual certificates.
355 -
356 -
357 357  == 4.2  For -CB /-CS model ==
358 358  
359 359  === 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===