![]() While the above password-based security will dissuade casual hacking attempts, it is not highly secure. Chapters below provide additional information regarding security and safety of OTA updates. The developer should ensure that the application running on the module is shut down and restarted in a safe manner. Once the update is complete, the module restarts, and the new code is executed. It is up to the developer to ensure that updates are allowed only from legitimate / trusted sources. If the OTA routines are correctly implemented in the sketch, then all subsequent uploads may be done over the air.īy default, there is no imposed security for the OTA process. In any case, the first firmware upload has to be done over a serial port. The other two options would be more useful after deployment, to provide the module with application updates either manually with a web browser, or automatically using an HTTP server. The Arduino IDE option is intended primarily for the software development phase. Such functionality becomes extremely useful in case of limited or no physical access to the module. OTA (Over the Air) update is the process of uploading firmware to an ESP module using a Wi-Fi connection rather than a serial port.
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