The only disadvantage is that you have to add an extra code for OTA with every sketch you upload, so that you’re able to use OTA in the next update. One important feature of OTA is that one central location can send an update to multiple ESPs sharing same network. It helps reduce the amount of time spent for updating each ESP module at the time of maintenance. OTA functionality is extremely useful in case of no physical access to the ESP module.
The OTA programming allows updating/uploading a new program to ESP32 using Wi-Fi instead of requiring the user to connect the ESP32 to a computer via USB to perform the update. This is known as Over-The-Air (OTA) programming. A fantastic feature of any WiFi-enabled microcontroller like ESP32 is the ability to update its firmware wirelessly.
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