How to avoid output boot on ESP32

[luc-github]

On ESP32

You just need to connect GPIO15 to GND and verbose boot :

rst:0x10 (RTCWDT_RTC_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0010,len:4
load:0x3fff0014,len:956
load:0x40078000,len:0
load:0x40078000,len:11856
entry 0x40078a34
M117 SSID NETGEAR_2GEXT_OFFICE2
M117 Connecting.   
M117 Connecting..  
M117 192.168.1.44

will become clean boot:

M117 SSID NETGEAR_2GEXT_OFFICE2
M117 Connecting.   
M117 Connecting..  
M117 192.168.1.44

[luc-github]

On ESP32-S3

the pin is the GPIO46 - but need a preset in efuse which cannot be changed when done check documentation and here page 22/23

so use :

#include <esp_efuse.h>
esp_efuse_set_rom_log_scheme(ESP_EFUSE_ROM_LOG_ON_GPIO_HIGH);

so I may add an [ESPXXX] command for this for S3

ESP32-S2

the pin is the GPIO46 and need same efuse setting as above

ESP32-C3

the pin is the GPIO8 and need same efuse setting as above