W5100S-EVB-Pico hangs after consecutive requests (MicroPython)

Question

Hello, I’m trying to send a simple HTTP GET request every 5 seconds, but after 4 requests, the board hangs/crashes without giving an error. I have to reboot the board before I can work with it again. Am I creating a stack overflow or something? I’m using the example including urequests.py from: github.com RP2040-HAT-MicroPython/examples/HTTP/HTTP_Client at main ·... main/examples/HTTP/HTTP_Client Contribute to Wiznet/RP2040-HAT-MicroPython development by creating an account on GitHub. import network import urequests import time from machine import Pin, Timer timer = Timer() def w5x00_init(): nic = network.WIZNET5K(machine.SPI(0), machine.Pin(17), machine.Pin(20)) nic.active(True) # DHCP while not nic.isconnected(): time.sleep(1) print('Connecting...') def request(timer): r = urequests.get("http://192.168.178.110:8000/controllers/status/test-1") print('Status: ' + str(r.status_code)) r.close def main(): w5x00_init() timer.init(period=5000, callback=request) if __name__ == "__main__": main()

Rogier · Answer

If I execute w5x00_init() every time before the request, the requests will continue to be executed. But we don’t want to send a DHCP request at every HTTP request to the gateway :). Static IP-addresses is a no-go too since this has to become a plug-and-play device.

Rogier · Answer

I’ve found a solution! Do a gc.collect() right after each request to free up some memory. Don’t forget to import gc at the top of your script.