Micropython Raspberry Pico – example #

Library requests_1.py #

The standard micropython build-in request library could give unexpected timeouts on GET command, even returned data is not stored properly, so a pautch has been made.

Source: https://github.com/shariltumin/bit-and-pieces/tree/main/web-client

This is a copy of the urequests library with a very slight modification to the content() method, using socket.recv(blk) instead of socket.read().

The urequests/requests is a frozen module in the standard MicroPython firmware. The modified version is named “requests_1.py” so as not to conflict with the standard version. To make use of this modified version:

1. copy requests_1.py to your flash
2. import requests_1 as request
3. req = requests.get(URL, timeout=10)

This is not an official version of the library and it is probably not good practice to use a modified version of the standard library. Please use the modified version of the library as a learning tool. If you find that this solves your problem, please request a modification from the MicroPython development team.

micropython requests patch socket.recv – requests_1.py.zip #

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Code to scan for Homewizard devices:

import network
import requests_1 as requests
import time
import json

ssid = "Matrix"
password = "139726845$e"

def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect(ssid, password)

    print("Verbinding maken met WiFi...")
    while not wlan.isconnected():
        time.sleep(1)

    ip = wlan.ifconfig()[0]
    print("Verbonden! IP:", ip)
    
    # Subnet bepalen: pak de eerste drie octetten
    subnet = ".".join(ip.split(".")[:3]) + "."
    print("Subnet:", subnet)
    
    return subnet  # Geeft het subnet terug

# Netwerkscan naar HomeWizard plug
def scan_network(subnet):
    api_endpoint = "/api"
    api_data_endpoint = "/api/v1/data"
    
    plugs = []  # Lijst om gevonden HomeWizard plugs op te slaan

    for i in range(5, 20):  # Scan bijvoorbeeld van .5 tot .20
        target_ip = subnet + str(i)
        url = f"http://{target_ip}{api_endpoint}"
        print(f"Scant: {target_ip}...")

        try:
            response = requests.get(url, timeout=1)
            info = response.json()
            if info.get('product_type') == "HWE-SKT":  # Plug is een HomeWizard SOCKET
                url = f"http://{target_ip}{api_data_endpoint}"
                response = requests.get(url, timeout=1)
                data = response.json()
                if data.get('wifi_ssid'):  # Plug is actief
                    print(f"HomeWizard PLUG gevonden op {target_ip} - Serial: {info['serial']} - WiFi strength: {data['wifi_strength']}")
                    plugs.append({
                        "ip": target_ip,
                        "serial": info['serial'],
                        "wifi_strength": data['wifi_strength']
                    })

        except Exception:
            pass  # IP is niet bereikbaar of geen HomeWizard plug

    # Output de gevonden plugs als JSON
    print(json.dumps(plugs))

# Start WiFi en scan
subnet = connect_wifi()
scan_network(subnet)

Thonny console output: