serial.print doesnt output when safeboot integrated.

[i-windows]

since my esp32 dev board has been flashed with safeboot example app. The only thing that is displayed ia serial is the bootloader. even if I now erase the flash and print something in setup nothing gets displayed but the boot loader.

the Wifi AP loads and other bits and bobs, but I cant cant any serial

rst:0x1 (POWERON_RESET),boot:0x13 (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:2
load:0x3fff0030,len:268
ho 0 tail 12 room 4
load:0x40078000,len:13224
ho 0 tail 12 room 4
load:0x40080400,len:4
load:0x40080404,len:2928
entry 0x4008055c

[mathieucarbou]

Converted to a discussion since this is not a bug related to the project but a usability issue.

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Yes, the example just opens a WiFi AP that you can connect and go to 192.168.4.1 to se a button allowing you to restart in recovery mode for flashing. Why would you want for the example to have some Serial output ;-) You can look at the code ;-)

The example is just a sample app showing how to restart in recovery mode. That's all.

[i-windows]

yes understand. I added the safeboot to a larger project and was wondering where the serial out went, just use it for some debug. recompiled the example app and also no output. After a few hours messing around, I've reflashed and repartitioned my dev board and now all works. many thanks its a super useful tool

[mathieucarbou]

thanks! indeed there is no relationship between what you do with your app and a recovery partition. Both are completely separated and the bootloader will decide which one to boot into. So the lack of Serial is obviously not caused by the SafeBoot partition itself.