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Last modified by Mengting Qiu on 2025/07/29 15:24
From version 52.2
edited by Mengting Qiu
on 2025/07/29 15:20
Change comment: There is no comment for this version
To version 49.8
edited by Mengting Qiu
on 2025/07/29 14:13
Change comment: There is no comment for this version

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329 329  
330 330  To effectively remove existing certificates or test certificate upload functionality, users may overwrite them with dummy data.
331 331  
332 -
333 333  To effectively "clear" existing certificates, users may overwrite them with arbitrary data by following these steps:
334 334  
335 -**Scenario A:** Clearing Existing Certificates
334 +1. Overwrite Certificates:
336 336  
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 -
339 -2. Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
336 +Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
340 340  Example:
341 341  
342 342  AT+CACERT=123456}
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345 345  
346 346  AT+CLIKEY=123456}
347 347  
345 +2. Upload Valid Certificates (Optional):
348 348  
347 +After overwriting, users may proceed to upload new valid certificates if needed.
349 349  
350 -2. Check for success responses after each command:
351 351  
352 -* Expected output:
353 -
354 -[[image:1753772253801-330.png||height="495" width="620"]]
355 -
356 -* If you get "Failure", retry or check module connectivity.
357 -
358 -3. Later, when you have real certificates, overwrite the dummy data with actual certificates.
359 -
360 -
361 361  == 4.2  For -CB /-CS model ==
362 362  
363 363  === 4.2.1 Upgrade the firmware to configure TLS firmware to set the certificate ===
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