esp32 reset repeatedly

[Jihun Kim]

i power on esp32, (GPOI 0 is 10k pull up)
and flash hello-world example (with FLASH_DOWNLOAD_TOOLS_V3.4.4)
but it is reset repearedly with this message


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:2
load:0x3ffc0008,len:0
load:0xffffffff,len:-1

how i can fix this problem

[ESP_Sprite]

What hardware do you have? Can you also try flashing using 'make flash'?

[Jihun Kim]

What hardware do you have? Can you also try flashing using 'make flash'?

i use customized esp32 module but it is same to esp32 demo board v2,

and make flash in msys2_shell

but same error message

[ESP_Sprite]

So it's customized, right? What is the difference between it and the v2 demo board? Also, what are you using as a 3.3V power supply?

[ESP_igrr]

Also, could you please try to select DOUT flash mode instead of DIO (in menuconfig, serial flasher options)?
From the log it appears that the ROM bootloader is not reading valid data from flash.