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Hi, I have a simple code in MicrpPython to connect to Wi-Fi, just to reproduce the error.

import network, requests, json

from machine import Pin

import time



ssid="branca"

pwd="zzzzzzzzz"

led=Pin(2,Pin.OUT)



led.off()



# Crea objeto de red wifi

wlan=network.WLAN(network.STA_IF)



# # Conecta a la red wifi

if not wlan.isconnected():

    print ('Connecting to ' + ssid, end=' -> ')

    wlan.active(True)

    time.sleep(1)

    wlan.connect(ssid, pwd)

    timeout=0

    while not wlan.isconnected() and timeout <10:

        print(str(timeout), end=',')

        time.sleep(1)

        timeout+=1

ip=wlan.ifconfig()[0]

print("Conectado. IP: ", ip)

led.on()



If I have the usb cable connected to an IDE, the board resets with this error:



Connecting to branca -> ets Jul 29 2019 12:21:46     



rst:0x8 (TG1WDT_SYS_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:4728

load:0x40078000,len:14888

load:0x40080400,len:3368

entry 0x400805cc

W (54) boot.esp32: PRO CPU has been reset by WDT.    

W (54) boot.esp32: WDT reset info: PRO CPU PC=0x40081b4b

W (56) boot.esp32: WDT reset info: APP CPU PC=0x40081b4b



If I close the IDE, the program runs normally. 

Is there a hardware malfunction .?. The board functioned well  2 days ago !!!!!