The kit is with the wroom module, but my issue is with the main Serial port, not with Serial2, Serial2 works as expected

Thanks for your reply. Forgot to mention it but I don't think the buttons are the issue. I disabled the automatic reset on the esptool and I did some test flashing through the UART chip on board, first using the buttons, and then strapping the GPIO0 to ground and reseting, leaving the module in boot...

Is it possible to flash the Esp32 module in the dev kit WITHOUT using the included micro-usb connection? I've been doing some tests with a max3232 adapter since I need to connect the chip to a RS232 port in the final developement, but while I can read and write through the Rx and Tx pins ( EDIT : tu...