if the error code changes it certainly is another error. No clue what -1 means, sorry.

@Innocenzo did you solve the problem?

@shariq I have the code below in main.py, which sets up the device for connecting to my router with a fixed IP, which you then can use to access the device. WIFI_IP = "aa.bb.cc.ss" ROUTER_IP = "aa.bb.cc.rr") WIFI_SSID = "your AP SSID" WIFI_PASS = "your AP Password" def do_connect(): import network import time wlan = network.WLAN(mode=network.WLAN.STA) # create station interface if not wlan.isconnected(): # check if the station is connected to an AP wlan.ifconfig(config=(WIFI_IP, "255.255.255.0", ROUTER_IP, ROUTER_IP)) wlan.connect(ssid=WIFI_SSID, auth=(network.WLAN.WPA2, WIFI_PASSWD)) for _ in range(100): if wlan.isconnected(): # check if the station is connected to an AP break print('.', end='') time.sleep_ms(200) else: print("Connect attempt timed out\n") return print('\nnetwork config:', wlan.ifconfig()) do_connect()

@michalt38 OK. Then you'll need two steps: First, you have to connect the WiPy to the network. That's done with wlan.connect, as given in my sample scripts. Second: you have to write a little program for you WiPy and your PC that connects through sockets and sends the data. The IP adresses used are those of the WiPy and the PC, not the one of the router. You have to define which entity connects (socket.connect() ) and which entity accepts (socket.accept()). For initial testing, you can use for the PC side netcat (nc), which is a simple raw socket send/receive program. Examples for the WIPy side are here: https://docs.python.org/3/howto/sockets.html or here: https://www.tutorialspoint.com/python3/python_networking.htm

@beyonlo I found the solution with wireshark. I was testing the web page with chrome. Chrome is a litle bit buggy to test single threaded web servers. It does a pre-connection without sending any data in order to be ready for next request.

@Clemens Thank you Clemens to pointing this out for me , Actually the Maximum Payload is 64B for the Lopy . i was thinking that packets were cut internally but not. Nice to see that no one had this problem before. I have already bypassed the problem by cutting the packets. Thanks again .

similar problem. this: sigfox = Sigfox(mode=Sigfox.SIGFOX, rcz=Sigfox.RCZ1) s = socket.socket(socket.AF_SIGFOX, socket.SOCK_RAW) s.setblocking(True) s.setsockopt(socket.SOL_SIGFOX, socket.SO_RX, True) s.send(bytes([0x00, scale(lux.light()[0]), 3, 4, 5, 6, 7, 8, 9, 10, 0xAA, 0xFF])) retval = s.recv(32) print ("received " + retval) gives me: Traceback (most recent call last): File "<stdin>", line 164, in <module> OSError: [Errno 100] ENETDOWN whilst the backend shows me: Status : [ACKED] Data (Hexa) : cafecafecafecafe any idea what i'm missing here? It's definitively not the link - sender and receiver have free LOS. avgSnr=20.74 rssi=-52.00 Used HW: FiPy on '1.17.5.b6'

Hello, fileno method added here: https://forum.pycom.io/topic/1951/new-firmware-release-version-v1-9-2-b1 Cheers, Daniel