Hello

In order to manufacture products using ESP32, it is necessary to write automatically.
Also at that time, you need to define the serial number, build, and FLASH.
Do you have any suggestions for how to do this?

I installed the sample programs of ble_spp_server and ble_spp_client on the two ESP32-DEVKITCs respectively, and communicating between those devices. In the case of sending a large amount of data from the server to the client at once when the radio wave condition is bad, we are in trouble because of...