ESP32 Forum

Posted: **Sun Nov 27, 2016 9:35 pm**

Succesfully setup the toolchain but every program I flash (including the 01_hello_world) results in a boot loop with the attached printout. Any ideas?

Code: Select all

rst:0x7 (TG0WDT_SYS_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:0x3ffc0008,len:1964
load:0x40078000,len:3648
ho 0 tail 12 room 4
load:0x40080000,len:256
entry 0x40080034
␛[0;32mI (807) heap_alloc_caps: Initializing heap allocator:␛[0m
␛[0;32mI (808) heap_alloc_caps: Region 19: 3FFB51B8 len 0002AE48 tag 0␛[0m
␛[0;32mI (818) heap_alloc_caps: Region 25: 3FFE8000 len 00018000 tag 1␛[0m
␛[0;32mI (878) cpu_start: Pro cpu up.␛[0m
␛[0;32mI (913) cpu_start: Starting app cpu, entry point is 0x40080b08␛[0m
␛[0;32mI (0) cpu_start: App cpu up.␛[0m
␛[0;32mI (1006) cpu_start: Pro cpu start user code␛[0m
␛[0;32mI (1154) rtc: rtc v160 Nov 22 2016 19:00:05␛[0m
␛[0;32mI (1200) rtc: XTAL 40M␛[0m
␂  0��lP�?@��␃3␇�@␂  0��␂ets Jun  8 2016 00:22:57

Posted: **Mon Nov 28, 2016 2:43 am**

What hardware setup, specifically which means of power supply are you using?

Posted: **Mon Nov 28, 2016 6:45 am**

From an UNO through the 3V3 pin which, according to spec, should provide up to 150mA. Is that not enough?

Posted: **Mon Nov 28, 2016 4:38 pm**

Nope, not really. The ESP32 can sometimes pull 200mA continuous, with peaks to 500mA depending on WiFi. Normally, 300mA and good decoupling should get everything working; 500mA will do if you want to be on the safe side.

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