Can't figure out how to flash

[TPecorella]

Hi,

I have two boards: a WeMos ESP32-wroom, and an ESP32-SOLO-1 (marked as ESP_DevKitc_v4).

The WeMos boots and can be flashed with no issues at all.

The SOLO-1... can't figure out how to flash it.

I did modify the CONFIG_FREERTOS_UNICORE, but when I try to flash it, the result is always the same:

Code: Select all

Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header
esptool.py failed with exit code 2

I tried pushing the BOOT and EN buttons, but nothing happens, no matter how or when I press them.

What's the correct way to flash 'em ?
And how can I tell if they are faulty ?

Thanks.