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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 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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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 Clear Certificates by Overwriting (For -NB/-NS Modules) ====
326 +
327 +
328 +The -NB/-NS modules (BC660K) do not support clearing certificates via AT commands or firmware updates.
329 +
330 +To effectively remove existing certificates, users may overwrite them with dummy data.
331 +
332 +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"]]**
333 +
334 +2. Use the standard AT commands (AT+CACERT, AT+CLICERT, AT+CLIKEY) to write non-certificate data (e.g., random strings like 123456).
335 +Example:
336 +
337 +AT+CACERT=123456}
338 +
339 +AT+CLICERT=123456}
340 +
341 +AT+CLIKEY=123456}
342 +
343 +3. Check for success responses after each command:
344 +
345 +[[image:1753772253801-330.png||height="495" width="620"]]
346 +
347 +(If you get "Failure", retry or check module connectivity.)
348 +
349 +
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 ===
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