ESP32 Forum

While playing with OLED code on my DOIT v 1 module I seem to have "broken" the USB interface via the CP2102 chip. If I hold the Boot button down while plugging into USB, the board powers up but when I attempt to use the Arduino Monitor on COM 5, communication with the CP2102 stops. I believe the opening of the Serial interface, either Monitor or PuTTY creates a "Reset" action via one of the USB/Serial control lines. Here is what I see:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:1760
load:0x40078000,len:6668
load:0x40080000,len:252
entry 0x40080034
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Any ideas what I did and how do I get my "toy" working again?

The log you posted looks like the normal boot sequence of an ESP32 starting its software bootloader. It doesn't continue to start the bootloader and load the Arduino sketch?

Holding down the BOOT button should force the ESP32 into ROM bootloader mode (for Arduino to upload a new sketch over serial.)

Appears the only thing "broken" was my memory!
I had made some changes on my ESP8266 Huzzha board and didn't remember there was a difference.

Thanks