I have developed an application that interacts with a 8 way relay. The application runs on a ESP32 Nodemcu (Devkitc ) board. I am currently testing the application, and I see the following error. The power supply to the esp32 comes from the PC (via USB), the 3.3 v pin and ground are connected to the Vcc and Ground pins, respectively, of the relay. I have the following pins connected in output mode to the relay (GPIO 15, 2, 4, 5, 18, 19, 21, 22). When the esp32 powered up, I saw the following errors, and I disconnected it. Can someone please help me understand the following errors and their consequence. Many Thanks.
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$ make monitor
Toolchain path: /opt/xtensa-esp32-elf/bin/xtensa-esp32-elf-gcc
Toolchain version: crosstool-ng-1.22.0-80-g6c4433a5
Compiler version: 5.2.0
Python requirements from D:/Raajesh/esp32/msys32/home/RAAJESH/esp/esp-idf/requirements.txt are satisfied.
MONITOR
--- idf_monitor on COM5 115200 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
ts Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33ets Jun 8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (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
cmd len -1
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (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
cmd len -1
ets_main.c 371
ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (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
cmd len -1
ets_main.c 371
ets Jun 8 2016 00:22:57
......