I am using W5500-EVB-PICO to connect via Ethernet to the network. Later I want to send out BME680 data to Thingspeak. Whatever I try, I always get "Socket operation failed: [Errno 107] ENOTCONN". I am trying firmware rp2_w5500_20220318_v1.04.uf2, rp2_w5500_20220421_v1.0.5.uf2 and rp2_w5500_20221111_v2.0.0.uf2.
Does someone know the issue and might help with some good solutions?
This is my minimal code example.
MAIN2.py
from machine import Pin, SPI
import network
import socket
import time
# Pin definitions
SPI_MOSI_PIN = 19
SPI_MISO_PIN = 16
SPI_SCK_PIN = 18
SPI_CS_PIN = 17
RESET_PIN = 20
LED_PIN = 25
# Initialize LED
led = Pin(LED_PIN, Pin.OUT)
def init_ethernet():
"""Initialize W5500 Ethernet connection"""
print("\nInitializing Ethernet...")
led.value(0)
try:
# Initialize SPI for W5500
print("Initializing SPI...")
spi = SPI(0,
baudrate=500_000,
mosi=Pin(SPI_MOSI_PIN),
miso=Pin(SPI_MISO_PIN),
sck=Pin(SPI_SCK_PIN))
# Initialize CS and Reset pins
print("Initializing control pins...")
cs = Pin(SPI_CS_PIN, Pin.OUT)
reset = Pin(RESET_PIN, Pin.OUT)
# Hard reset sequence
print("Performing hard reset sequence...")
cs.value(1)
reset.value(1)
time.sleep(0.5)
reset.value(0)
time.sleep(0.5)
reset.value(1)
time.sleep(0.5)
# Initialize WIZNET5K
print("Creating network interface...")
nic = network.WIZNET5K(spi, cs, reset)
time.sleep(1)
# Configure network with retries
print("Activating interface and waiting for DHCP...")
retry_count = 0
max_retries = 5
connected = False
while not connected and retry_count < max_retries:
try:
retry_count += 1
print("\nAttempt {}/{}:".format(retry_count, max_retries))
# Reset interface
print("Resetting interface...")
nic.active(False)
time.sleep(1)
nic.active(True)
time.sleep(1)
# Wait for DHCP configuration
print("Waiting for DHCP configuration", end="")
for _ in range(15): # 15 second timeout
if nic.isconnected():
config = nic.ifconfig()
if config[0] != '0.0.0.0': # Valid IP received
connected = True
break
print(".", end="")
time.sleep(1)
print()
if connected:
print("\nNetwork configured successfully:")
print("IP:", config[0])
print("Subnet:", config[1])
print("Gateway:", config[2])
print("DNS:", config[3])
break
else:
print("DHCP configuration failed, retrying...")
except Exception as e:
print("Attempt failed:", str(e))
time.sleep(2)
if not connected:
raise Exception("Failed to configure network after {} attempts".format(max_retries))
print("\nNetwork interface ready!")
time.sleep(2) # Final stabilization delay
return nic
except Exception as e:
print("Error in init_ethernet:", str(e))
led.value(0)
raise
def test_network(nic):
"""Test network connectivity"""
sock = None
try:
print("\nTesting network connection...")
# Check basic connectivity
print("Interface connected:", nic.isconnected())
print("Interface active:", nic.active())
# Get network config
config = nic.ifconfig()
print("\nNetwork configuration:")
print("IP:", config[0])
print("Subnet:", config[1])
print("Gateway:", config[2])
print("DNS:", config[3])
# Test local connection first
print("\nTesting local connection...")
try:
sock = socket.socket()
sock.settimeout(5)
print("Connecting to gateway...")
sock.connect((config[2], 80))
print("Gateway connection successful!")
sock.close()
sock = None
except Exception as e:
print("Gateway connection failed:", str(e))
if sock:
sock.close()
sock = None
# Test internet connection
print("\nTesting internet connection...")
try:
sock = socket.socket()
sock.settimeout(5)
print("Connecting to 8.8.8.8...")
sock.connect(("8.8.8.8", 53))
print("Internet connection successful!")
sock.close()
sock = None
except Exception as e:
print("Internet connection failed:", str(e))
if sock:
sock.close()
sock = None
# Test DNS resolution
print("\nTesting DNS resolution...")
try:
print("Resolving api.thingspeak...")
addr_info = socket.getaddrinfo("api.thingspeak", 80)
print("DNS response:", addr_info)
server_addr = addr_info[0][-1]
print("Server address:", server_addr)
sock = socket.socket()
sock.settimeout(10)
print("\nConnecting to ThingSpeak...")
sock.connect(server_addr)
print("ThingSpeak connection successful!")
print("\nSending test request...")
request = b"GET / HTTP/1.0\r\nHost: api.thingspeak\r\n\r\n"
sock.write(request)
print("Reading response...")
response = sock.read(256)
if response:
print("Response received:", response)
else:
print("No response received")
except Exception as e:
print("ThingSpeak connection failed:", str(e))
finally:
if sock:
sock.close()
print("Socket closed")
return True
except Exception as e:
print("\nTest failed:", str(e))
if sock:
try:
sock.close()
except:
pass
return False
def main():
"""Main diagnostic loop"""
while True:
try:
# Initialize ethernet
nic = init_ethernet()
# Wait for DHCP
print("\nWaiting for DHCP...")
for _ in range(20):
if nic.isconnected():
break
print(".", end="")
time.sleep(1)
print()
# Run network tests
if test_network(nic):
led.value(1)
print("\nAll tests completed. Press Ctrl+C to exit.")
while True:
time.sleep(1)
except Exception as e:
print("Error in main loop:", str(e))
led.value(0)
time.sleep(5)
if __name__ == "__main__":
main()
The result with errors I get is:
MPY: soft reboot
Initializing Ethernet... Initializing SPI... Initializing control pins... Performing hard reset sequence... Creating network interface... Activating interface and waiting for DHCP...
Attempt 1/5: Resetting interface... netif changed 10.10.1.6 Waiting for DHCP configuration
Network configured successfully: IP: 10.10.1.6 Subnet: 255.255.255.0 Gateway: 10.10.1.1 DNS: 10.10.1.1
Network interface ready!
Waiting for DHCP...
Testing network connection... Interface connected: True Interface active: None
Network configuration: IP: 10.10.1.6 Subnet: 255.255.255.0 Gateway: 10.10.1.1 DNS: 10.10.1.1
Testing local connection... Gateway connection failed: [Errno 107] ENOTCONN
Testing internet connection... Internet connection failed: [Errno 107] ENOTCONN
Testing DNS resolution... Resolving api.thingspeak... DNS response: [(2, 1, 0, '', ('54.172.245.49', 80))] Server address: ('54.172.245.49', 80) ThingSpeak connection failed: [Errno 107] ENOTCONN Socket closed
All tests completed. Press Ctrl+C to exit.