esp32s3 with wifi boot loop, BROWNOUT_RST

[kaspar030]

Bug description

I have multiple esp32-s3 devkits that seem to reboot with BROWNOUT_RST.
I'm pretty sure they worked at some point though.

Any ideas?

Running `espflash flash --monitor target/xtensa-esp32s3-none-elf/release/wifi_dhcp`                                                                       
[2025-02-05T18:08:59Z INFO ] Serial port: '/dev/ttyACM0'                                                                                                       
[2025-02-05T18:08:59Z INFO ] Connecting...                                                                                                                     
[2025-02-05T18:08:59Z INFO ] Using flash stub                                                                                                                  
Chip type:         esp32s3 (revision v0.2)                                                                                                                     
Crystal frequency: 40 MHz                                                                                                                                      
Flash size:        16MB                                                                                                                                        
Features:          WiFi, BLE                                                                                                                                   
MAC address:       64:e8:33:54:3c:e4                                                                                                                           
App/part. size:    704,128/1,048,576 bytes, 67.15%                                                                                                             
[2025-02-05T18:09:01Z INFO ] Segment at address '0x0' has not changed, skipping write                                                                          
[2025-02-05T18:09:01Z INFO ] Segment at address '0x8000' has not changed, skipping write                                                                       
[00:00:42] [========================================]     439/439     0x10000                                                                                  
[2025-02-05T18:09:45Z INFO ] Flashing has completed!                                                                                                           
Commands:                                                                      
    CTRL+R    Reset chip                                                                                                                                           CTRL+C    Exit                                                                                                                                                                                                                                                                                                            ESP-ROM:esp32s3-20210327                                                       
Build:Mar 27 2021         
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)                               
SPIWP:0xee                                                                     
mode:DIO, clock div:2             
load:0x3fce3818,len:0x16f8   
load:0x403c9700,len:0x4       
load:0x403c9704,len:0xc00   
load:0x403cc700,len:0x2eb0                                                     
entry 0x403c9908               
I (30) boot: ESP-IDF v5.1-beta1-378-gea5e0ff298-dirt 2nd stage bootloader      
I (30) boot: compile time Jun  7 2023 08:07:32                                                                                                                 
I (31) boot: Multicore bootloader
I (35) boot: chip revision: v0.2
I (39) boot.esp32s3: Boot SPI Speed : 40MHz
I (44) boot.esp32s3: SPI Mode       : DIO
I (49) boot.esp32s3: SPI Flash Size : 4MB
I (53) boot: Enabling RNG early entropy source...
I (59) boot: Partition Table:
I (62) boot: ## Label            Usage          Type ST Offset   Length
I (70) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (77) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (85) boot:  2 factory          factory app      00 00 00010000 00100000
I (92) boot: End of partition table
I (96) esp_image: segment 0: paddr=00010020 vaddr=3c0a0020 size=195d4h (103892) map
I (130) esp_image: segment 1: paddr=000295fc vaddr=3fc90a60 size=02824h ( 10276) load
I (134) esp_image: segment 2: paddr=0002be28 vaddr=3fca8238 size=001ech (   492) load
I (136) esp_image: segment 3: paddr=0002c01c vaddr=40378000 size=03ffch ( 16380) load
I (150) esp_image: segment 4: paddr=00030020 vaddr=42000020 size=873d4h (553940) map
I (291) esp_image: segment 5: paddr=000b73fc vaddr=4037bffc size=04a60h ( 19040) load
I (301) boot: Loaded app from partition at offset 0x10000
I (301) boot: Disabling RNG early entropy source...
INFO - esp-wifi configuration EspWifiConfig { rx_queue_size: 5, tx_queue_size: 3, static_rx_buf_num: 10, dynamic_rx_buf_num: 32, static_tx_buf_num: 0, dynamic_
tx_buf_num: 32, ampdu_rx_enable: true, ampdu_tx_enable: true, amsdu_tx_enable: false, rx_ba_win: 6, max_burst_size: 1, country_code: "CN", country_code_operati
ng_class: 0, mtu: 1492, tick_rate_hz: 100, listen_interval: 3, beacon_timeout: 6, ap_beacon_timeout: 300, failure_retry_cnt: 1, scan_method: �ESP-ROM:esp32s3-2
0210327
Build:Mar 27 2021
rst:0xf (BROWNOUT_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)

...

To Reproduce

1. cargo xtask run-example examples esp32s3 wifi_dhcp
2. ...

Expected behavior

Environment

• Target device: esp32-s3-devkitc-1

Crystal frequency: 40 MHz
Flash size:        16MB
Features:          WiFi, BLE
MAC address:       64:e8:33:54:3c:e4

• Crate name and version: tried all the way up from 0.20.0 to current master

[bugadani]

Brownout reset means something's up with your devkits' power supply.

[kaspar030]

Brownout reset means something's up with your devkits' power supply.

I fell for the USB hub not keeping up. Powering that properly fixes this. (All the other devkits worked flawlessly, so I didn't think about that.) Sorry for the noise and many thanks for taking a look!