Why does my ESP32 keep on reseting after startup?

[rjrajbir]

Hi,
I have wired up my ESP32 and after I power it, it keeps on restarting with the message:

rst:0x10 (RTCWDT_RTC_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:1
load:0x3fff0018,len:4
load:0x3fff001c,len:812
load:0xffffffff,len:-1
ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_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:1
load:0x3fff0018,len:4
load:0x3fff001c,len:812
load:0xffffffff,len:-1
ets Jun 8 2016 00:22:57
I have connected a number of devices with a keypad connected on GPIOs [6, 7, 8, 15, 4, 16, 17, 15] and both RTC and LCD Serial Adapter connected on pins [21, 22]. All devices are powered by the ESP32's 5V pin.

Now, strangely, when resetting, if I press number 1 on the keypad (4x4) or disconnect it, the resetting stops and everything works as expected even after reconnecting it. The same happens with the LCD serial adapter. All other devices do not affect the ESP32.

Any insight as to what may be causing this peculiar behavior will be greatly appreciated.

[WiFive]

you can't use gpio 6-11