--- title: "W5500 and Circuitpython examples (socket library)." url: "https://maker.wiznet.io/forum/15121" markdown_url: "https://maker.wiznet.io/forum/15121/md" type: "Forum topic" category: "Ethernet Chips" author: "Henrik" created: "2024-01-15T18:57:06+09:00" last_activity: "2024-01-15T19:05:43+09:00" language: "en" views: 486 replies: 0 source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)" --- # W5500 and Circuitpython examples (socket library). ## Question Asked by Henrik on 2024-01-15 in Ethernet Chips. I’m playing around with CircuitPython on a W5500-EVB-Pico. I’m trying to get the basic Loopback example program to work but can’t. Here’s what I’ve done. Downloaded CircuitPython 8.2.9 for W5500-EVB-Pico from: ![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/0/0601bca26344e8eded02f5b5b9102fe4f90e93af.png) [circuitpython.org](https://circuitpython.org/board/wiznet_w5500_evb_pico/) ![](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/c/cd1e4df215b6b1f6348052366315ff801a24e184.jpeg) ### [CircuitPython - W5500-EVB-Pico Download](https://circuitpython.org/board/wiznet_w5500_evb_pico/) W5500-EVB-Pico is a microcontroller evaluation board based on the Raspberry Pi RP2040 and fully hardwired TCP/IP controller W5500 – and basically works the same as Raspberry Pi Pico board but with additional Ethernet via W5500. Raspberry Pi Pico... Installed CircuitPython onto W5500-EVB-Pico Downloaded everything (as .zip archive) from: - [GitHub - Wiznet/RP2040-HAT-CircuitPython](https://github.com/Wiznet/RP2040-HAT-CircuitPython) From the unzipped RP2040-HAT-CircuitPython-master folder, copied - adafruit_bus_device (folder) - adafruit_wiznet5k (folder) - adafruit_requests.py (file) to the lib folder on the W5500-EVB-Pico In Thonny open and run W5x00_Loopback.py At this point I get the following in the Shell: ``` Wiznet5k Loopback Test (DHCP) server listen Chip Version: w5500 MAC Address: ['0x0', '0x1', '0x2', '0x3', '0x4', '0x5'] My IP address is: 192.168.10.187 ``` which tells me the thing is “working” and has aquired an IP-address on my network - great. Now, I start Putty and connect to 192.168.10.187:5000 and get this: ``` socket connected socket object at 0x20018990> ('192.168.10.198', 61839) Traceback (most recent call last): File "", line 76, in AttributeError: 'socket' object has no attribute 'status' ``` The offending line 76 is here: ``` 71 if conn is None: 72 conn, addr = server.accept() # Wait for a connection from a client. 73 print("socket connected") 74 print(conn, addr) 75 else : 76 if conn.status in ( 77 SNSR_SOCK_FIN_WAIT, 78 ): ``` Looking at the socket library it seems as if ‘status’ is private (or something) since it’s prepended with an underscode in the code. If I change line 76 to`if conn._status` it does get passed that line but crashes on the next line where conn.‘something’ is accessed (conn.close(), conn.disconnec(), conn.available() and so on). The “solution” is the same, change to conn._‘something’ but it just doesn’t feel right, there’s more to it than a missing underscore. Can someone please exaplain what I’m doing wrong? Here’s the complete code as it sits on the Pico ``` import board import busio import digitalio import time from adafruit_wiznet5k.adafruit_wiznet5k import * import adafruit_wiznet5k.adafruit_wiznet5k_socket as socket ##SPI0 SPI0_SCK = board.GP18 SPI0_TX = board.GP19 SPI0_RX = board.GP16 SPI0_CSn = board.GP17 ##reset W5x00_RSTn = board.GP20 print("Wiznet5k Loopback Test (DHCP)") # Setup your network configuration below # random MAC, later should change this value on your vendor ID MY_MAC = (0x00, 0x01, 0x02, 0x03, 0x04, 0x05) IP_ADDRESS = (192, 168, 1, 100) SUBNET_MASK = (255, 255, 255, 0) GATEWAY_ADDRESS = (192, 168, 1, 1) DNS_SERVER = (8, 8, 8, 8) led = digitalio.DigitalInOut(board.GP25) led.direction = digitalio.Direction.OUTPUT ethernetRst = digitalio.DigitalInOut(W5x00_RSTn) ethernetRst.direction = digitalio.Direction.OUTPUT # For Adafruit Ethernet FeatherWing cs = digitalio.DigitalInOut(SPI0_CSn) # For Particle Ethernet FeatherWing # cs = digitalio.DigitalInOut(board.D5) spi_bus = busio.SPI(SPI0_SCK, MOSI=SPI0_TX, MISO=SPI0_RX) # Reset W5x00 first ethernetRst.value = False time.sleep(1) ethernetRst.value = True # # Initialize ethernet interface without DHCP # eth = WIZNET5K(spi_bus, cs, is_dhcp=False, mac=MY_MAC, debug=False) # # Set network configuration # eth.ifconfig = (IP_ADDRESS, SUBNET_MASK, GATEWAY_ADDRESS, DNS_SERVER) # Initialize ethernet interface with DHCP eth = WIZNET5K(spi_bus, cs, is_dhcp=True, mac=MY_MAC, debug=False) # Initialize a socket for our server socket.set_interface(eth) server = socket.socket() # Allocate socket for the server server_ip = None # IP address of server server_port = 5000 # Port to listen on server.bind((server_ip, server_port)) # Bind to IP and Port server.listen() # Begin listening for incoming clients print("server listen") print("Chip Version:", eth.chip) print("MAC Address:", [hex(i) for i in eth.mac_address]) print("My IP address is:", eth.pretty_ip(eth.ip_address)) conn = None while True: # Maintain DHCP lease eth.maintain_dhcp_lease() if conn is None: conn, addr = server.accept() # Wait for a connection from a client. print("socket connected") print(conn, addr) else : if conn._status in ( SNSR_SOCK_FIN_WAIT, ): print("socket SNSR_SOCK_FIN_WAIT") conn.close() conn = None elif conn._status in ( SNSR_SOCK_CLOSE_WAIT, ): print("socket SNSR_SOCK_CLOSE_WAIT") conn.disconnect() conn.close() conn = None else : # print("socket established", conn.status) avail = conn.available() if avail: # print("Received size:", avail) # data = conn.recv(0) data = conn.embed_recv(2048) if data: print("DATA ptr", id(data), ",DATA Len: ", len(data)) conn.send(data) # Echo message back to client ``` Thank you in advance! --- Source: https://maker.wiznet.io/forum/15121