OSError: no available NIC after Soft-Reset

[zmaier]

Hello,

i have a problem, hopefully you can help me.
After a soft-reset (CTRL-D in REPL), i get the error that there is no available NIC when using the urequest.post command. After a hard-reset everything is working fine.
Propably the re-initialization of the wifi interface is not done right?

boot.py

import machine
import os
from network import WLAN
import time
import pycom
import urequests

pycom.heartbeat(False)
uart = machine.UART(0, baudrate=115200)
os.dupterm(uart)

wlan = WLAN()

if machine.reset_cause() != machine.SOFT_RESET:
	print('Init Wlan',end='')
	wlan.mode(WLAN.STA)
	print(' done')

if wlan.isconnected():
	print('Already connected to WiFi network.')
		print(wlan.ssid())
else:
	nets = wlan.scan()
	net_to_use=[]
	pw=[]
	for net in nets:
		if net.ssid =='Malle16':
			net_to_use=net
			pw='123456'
	if net_to_use==[]:
		for net in nets:
			if net.ssid =='FRITZ!WLAN Repeater N/G':
				net_to_use=net
				pw='123456'
	if net_to_use==[]:
		for net in nets:
			if net.ssid =='Outdoor':
				net_to_use=net
				pw='456'
	wlan.connect(net_to_use.ssid, auth=(net_to_use.sec, pw), timeout=10000)
	while not wlan.isconnected():
		time.sleep_ms(500)
		print('.', end='')
	print(' connected.')
print("IP address: " + wlan.ifconfig()[0])
print('-----------------------------')

print('boot.py finished')
machine.main('main.py')

main.py

	payload="status,volk={0} wert={1:0.2f} {2}".format(Volk_Nummer,Status,t)
	response = urequests.post(db, data=payload)
	print('---- Influxdb Update OK ----')

	time.sleep(20