My company has built a prototype board based on the ESP-WROOM-32, but (currently) without the UART circuitry to automatically enter flash mode. So, I'm experimenting with button pushing for the first time. I've read The Bible, as well as this page: https://github.com/espressif/esptool/wi ... -Selection, and I just want to confirm: to enter flash mode, I hold down the EN button, and press BOOT, right? And at this point, I should expect the "make flash" command to work?
Currently I get this message:
Oh, and once I enter flash mode, how much time do I have to initiate the flash download?Connecting........_____....._____....._____....._____....._____....._____....._____....._____....._____....._____
A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
Thanks for any insight.