boot:0x2 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_FEO_V2)) waiting for download

mkeyno
Posts: 6
Joined: Thu Jan 27, 2022 1:34 am

boot:0x2 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_FEO_V2)) waiting for download

Postby mkeyno » Thu Mar 24, 2022 8:22 pm

I use an esp32 wroom module for my project, however when connecting my board to power or when I upload my firmware it needs to be manually reset to start the program, the message on power-on is
  1.  rst:0x1 (POWERON_RESET),boot:0x2 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_FEO_V2)) waiting for download
my strapping pins state as follow
pin 0,2 ,12,15 as float
pin 4,5 connect to can transceiver as RX,TX
any tips really appreciated

lbernstone
Posts: 826
Joined: Mon Jul 22, 2019 3:20 pm

Re: boot:0x2 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_FEO_V2)) waiting for download

Postby lbernstone » Fri Mar 25, 2022 7:34 am

The design guides recommend a 1uF capacitor between the enable pin and ground to introduce a short delay between power up and boot, which can cause this issue.

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