CircuitPython WiFi HTTP Sensor Template

code.py

import time
import wifi
import socketpool
import wifi
import mdns
from adafruit_httpserver import (GET, JSONResponse, Request, Server)

WIFI_SSID = "your-wifi"
WIFI_PASSWORD = "your-password"
POLL_INTERVAL_S = 31
PORT = 9001

global_data = {
    "temperature": 70,
    "unit": "f"
}

def update_readings():
    # You would actually poll your sensor here
    global_data["temperature"] = 69 # nice

def connect_wifi():
    for attempt in range(3):
        try:
            wifi.radio.connect(WIFI_SSID, WIFI_PASSWORD)
            print("WiFi connected!")
            return True
        except Exception as e:
            print(f"WiFi attempt {attempt + 1} failed: {e}")
            if attempt < 2:
                time.sleep(2)
    return False

update_readings()
last_update = time.monotonic()
if not connect_wifi():
    # idk restart or something if you want
    pass

mdns_server = mdns.Server(wifi.radio)
# you'll be able to hit http://sensor_name.local:[PORT]/sensor to get the data as JSON
mdns_server.hostname = "sensor_name"
mdns_server.advertise_service(service_type="_http", protocol="_tcp", port=PORT)
pool = socketpool.SocketPool(wifi.radio)
server = Server(pool, debug=True)

@server.route("/sensor", [GET], append_slash=True)
def api(request: Request):
   return JSONResponse(request, global_data)

server.start(str(wifi.radio.ipv4_address), PORT)

while True:
    try:
        if (time.monotonic() - last_update > POLL_INTERVAL_S):
            update_readings()
            last_update = time.monotonic()
        pool_result = server.poll()
    except OSError as error:
        print(error)
        continue