WiPy 2.0 Captive Portal Network Config

[soulkiller]

Hello,
I was trying to implement a captive portal for the initial configuration of the device. I've been found some implementations on ESP8266 and ESP32 boards on the internet and decided to go with the below:
https://github.com/Matt4/micropython-captive-portal-network-setup
which uses DNS redirection method.
I've faced some issues regarding network library in Pycom ( using firmware 1.15.1 ).

• Ap mode is successfully initializes below code, but I've seen the IP of the board remains 0.0.0.0
• When I connect my android phone to the board, WiFi details in android as -> IP: 1.2.3.5 / Gateway: 1.2.3.4 / DNS: 1.2.3.4 Subnet: 255.255.255.0 , so it is correct I believe.
• On the android chrome when I enter the mock website address (asd.net), the redirection isn't happening.
  How it's possible to make automatic redirection to the captive portal, when a client connects to the board, am I missing something ?

import network
import usocket as socket
import ure

  ap = network.WLAN(mode=network.WLAN.AP, ssid="wipy" )
  ap.ifconfig(id=1, config=('1.2.3.4', '255.255.255.0', '1.2.3.4', '0.0.0.0'))

  ip = ap.ifconfig()[0]
  print("DNS Server: dom.query. 60 in A {:s}".format(ip))                 # Prints- DNS Server: dom.query. 60 in A 0.0.0.0

  udps = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  udps.setblocking(False)
  udps.bind(('',53))

  s = socket.socket()
  addr = (ip, 80)

  s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
  s.bind(addr)
  s.listen(1)
  s.settimeout(2)
  print("Web Server: Listening http://{}:80/".format(ip))                 # Prints- Web Server: Listening http://0.0.0.0:80/
  
  regex = ure.compile("network\?ssid=(.*?)&password=(.*?)\sHTTP")

  set_connection = False
  while set_connection is False:
    try:
      data, addr = udps.recvfrom(4096)
      print("Incoming data, from : ", addr)
      DNS = DNSQuery(data)
      udps.sendto(DNS.response(ip), addr)
      print("Replying: {:s} -> {:s}".format(DNS.domain, ip))               # Prints- Replying: beacons2.gvt2.com. -> 0.0.0.0
    except:
      print("No DNS")

    # Web server accepting connections
    try:
      res = s.accept()
      client_sock = res[0]
      client_addr = res[1]

      req = client_sock.recv(4096)
      print("Request:")
      print(req)
      client_sock.send(CONTENT)
      client_sock.close()
      print()
      search_result = regex.search(req)
      if search_result:
        incoming_network_name = search_result.group(1)
        incoming_network_pass = search_result.group(2)
        con = connection(incoming_network_name, incoming_network_pass)
        if con is True:
          d = {"network_name": incoming_network_name, "network_password": incoming_network_pass}
          f = open("config.json", "w")
          f.write(ujson.dumps(d))
          f.close()
    set_connection = True

    except:
      print("Timeout")
    time.sleep_ms(1000)
  udps.close()

Thanks in advance
-Baris

[Paul Thornton]

@soulkiller said in WiPy 2.0 Captive Portal Network Config:

1.15.1

Hello @soulkiller,

That firmware version is rather old now. a ton has been fixed in the networking area in later builds. Try giving this a go under 1.18. (latest stable). Hopefully you'll see better results.

[soulkiller]

Hello @paul-thornton , thank you for the reply. I've upgraded the firmware to 1.18.2, but still I get the same outputs.

[Panometric]

@soulkiller , did you get this working? Can you share an example? Thanks.

[jczic]

Hello,
I released a fully new version (v2.0) of my web server here : https://github.com/jczic/MicroWebSrv2.
Open source MIT, fully asynchronous, more robust, more fast and more efficient on Pycom modules.
It is delivered with a good documentation.
For captive portal, you can use a simple DNS server here (see readme) : https://github.com/jczic/MicroDNSSrv

Thank you for your support and feedback. ☺️