Updates for WLED

README.md

@@ -31,7 +31,7 @@ The CTA API can be fairly trivially queried to get a JSON response with the requ
     - `output->ctatt->eta` gives us a list of folders for all the next upcoming trains.
     - `output->ctatt->eta->0` gives us the next train.
     - `output->ctatt->eta->1` gives us the second to next train.
-    - `output->ctatt->eta->0-arrT` gives us the time the next train will arrive in an ISO date format, i.e. "2026-07-12T00:50:16"
+    - `output->ctatt->eta->0->arrT` gives us the time the next train will arrive in an ISO date format, i.e. "2026-07-12T00:50:16"
 - The problem with the Arrivals API, is you then need to query every station one by one, save the next arrival time of a train and then do something with the result (say, turn on an LED if it's less than 2 minutes away).
     - That's a lot of queries to check for the entire network. Especially for a little ESP32.
     - Very wasteful and abusive of the API for just your usage.

examples/src/micropython-webserver/Stations.py

@@ -0,0 +1,146 @@
+# Not currently used
+stations = {}
+stations[41090] = { 'name':' Monroe (Red Line)', 'eta':[], 'led_index':1, 'state':0 }
+stations[40820] = { 'name':' Rosemont (Blue Line)', 'eta':[], 'led_index': machine.Pin(15, machine.Pin.OUT), 'state':0 }
+stations[41010] = { 'name':' Rockwell (Brown Line)', 'eta':[], 'led_index':3, 'state':0 }
+stations[40470] = { 'name':' Racine (Blue Line)', 'eta':[], 'led_index':4, 'state':0 }
+stations[40190] = { 'name':' Sox-35th (Red Line)', 'eta':[], 'led_index':5, 'state':0 }
+stations[40020] = { 'name':' Harlem/Lake (Green Line)', 'eta':[], 'led_index':6, 'state':0 }
+stations[40900] = { 'name':' Howard (Red Purple & Yellow lines)', 'eta':[], 'led_index':7, 'state':0 }
+stations[41160] = { 'name':' Clinton (Green & Pink lines)', 'eta':[], 'led_index':8, 'state':0 }
+stations[40230] = { 'name':' Cumberland (Blue Line)', 'eta':[], 'led_index':9, 'state':0 }
+stations[40560] = { 'name':' Jackson (Red Line)', 'eta':[], 'led_index':10, 'state':0 }
+stations[41150] = { 'name':' Kedzie (Orange Line)', 'eta':[], 'led_index':11, 'state':0 }
+stations[40780] = { 'name':' Central Park (Pink Line)', 'eta':[], 'led_index':12, 'state':0 }
+stations[41080] = { 'name':' 47th (Green Line)', 'eta':[], 'led_index':13, 'state':0 }
+stations[40510] = { 'name':' Garfield (Green Line)', 'eta':[], 'led_index':14, 'state':0 }
+stations[41050] = { 'name':' Linden (Purple Line)', 'eta':[], 'led_index':2, 'state':0 }
+stations[40120] = { 'name':' 35th/Archer (Orange Line)', 'eta':[], 'led_index':16, 'state':0 }
+stations[40570] = { 'name':' California (Blue Line)', 'eta':[], 'led_index':17, 'state':0 }
+stations[40260] = { 'name':' State/Lake (Brown Green Orange Pink & Purple lines)', 'eta':[], 'led_index':18, 'state':0 }
+stations[40130] = { 'name':' 51st (Green Line)', 'eta':[], 'led_index':19, 'state':0 }
+stations[41700] = { 'name':' Washington/Wabash (Brown Green Orange Purple & Pink lines)', 'eta':[], 'led_index':20, 'state':0 }
+stations[41000] = { 'name':' Cermak-Chinatown (Red Line)', 'eta':[], 'led_index':21, 'state':0 }
+stations[40340] = { 'name':' Berwyn (Red Line)', 'eta':[], 'led_index':22, 'state':0 }
+stations[41690] = { 'name':' Cermak-McCormick Place (Green Line)', 'eta':[], 'led_index':23, 'state':0 }
+stations[40490] = { 'name':' Grand (Blue Line)', 'eta':[], 'led_index':24, 'state':0 }
+stations[41060] = { 'name':' Ashland (Orange Line)', 'eta':[], 'led_index':25, 'state':0 }
+stations[40090] = { 'name':' Damen (Brown Line)', 'eta':[], 'led_index':26, 'state':0 }
+stations[41280] = { 'name':' Jefferson Park (Blue Line)', 'eta':[], 'led_index':27, 'state':0 }
+stations[40520] = { 'name':' Foster (Purple Line)', 'eta':[], 'led_index':28, 'state':0 }
+stations[40330] = { 'name':' Grand (Red Line)', 'eta':[], 'led_index':29, 'state':0 }
+stations[40280] = { 'name':' Central (Green Line)', 'eta':[], 'led_index':30, 'state':0 }
+stations[40250] = { 'name':' Kedzie-Homan (Blue Line)', 'eta':[], 'led_index':31, 'state':0 }
+stations[40870] = { 'name':' Francisco (Brown Line)', 'eta':[], 'led_index':32, 'state':0 }
+stations[41240] = { 'name':' Addison (Blue Line)', 'eta':[], 'led_index':33, 'state':0 }
+stations[40740] = { 'name':' Western (Pink Line)', 'eta':[], 'led_index':34, 'state':0 }
+stations[41360] = { 'name':' California (Green Line)', 'eta':[], 'led_index':35, 'state':0 }
+stations[41400] = { 'name':' Roosevelt (Red Orange & Green lines)', 'eta':[], 'led_index':36, 'state':0 }
+stations[41410] = { 'name':' Chicago (Blue Line)', 'eta':[], 'led_index':37, 'state':0 }
+stations[40680] = { 'name':' Adams/Wabash (Brown Green Orange Pink & Purple lines)', 'eta':[], 'led_index':38, 'state':0 }
+stations[40920] = { 'name':' Pulaski (Blue Line)', 'eta':[], 'led_index':39, 'state':0 }
+stations[41210] = { 'name':' Wellington (Brown & Purple lines)', 'eta':[], 'led_index':40, 'state':0 }
+stations[41340] = { 'name':' LaSalle (Blue Line)', 'eta':[], 'led_index':41, 'state':0 }
+stations[41490] = { 'name':' Harrison (Red Line)', 'eta':[], 'led_index':42, 'state':0 }
+stations[41350] = { 'name':' Oak Park (Green Line)', 'eta':[], 'led_index':43, 'state':0 }
+stations[40040] = { 'name':' Quincy/Wells (Brown Orange Purple & Pink lines)', 'eta':[], 'led_index':44, 'state':0 }
+stations[40390] = { 'name':' Forest Park (Blue Line)', 'eta':[], 'led_index':45, 'state':0 }
+stations[41130] = { 'name':' Halsted (Orange Line)', 'eta':[], 'led_index':46, 'state':0 }
+stations[40960] = { 'name':' Pulaski (Orange Line)', 'eta':[], 'led_index':47, 'state':0 }
+stations[40830] = { 'name':' 18th (Pink Line)', 'eta':[], 'led_index':48, 'state':0 }
+stations[40140] = { 'name':' Dempster-Skokie  (Yellow Line)', 'eta':[], 'led_index':49, 'state':0 }
+stations[41320] = { 'name':' Belmont (Red Brown & Purple lines)', 'eta':[], 'led_index':50, 'state':0 }
+stations[41660] = { 'name':' Lake (Red Line)', 'eta':[], 'led_index':51, 'state':0 }
+stations[40910] = { 'name':' 63rd (Red Line)', 'eta':[], 'led_index':52, 'state':0 }
+stations[40690] = { 'name':' Dempster (Purple Line)', 'eta':[], 'led_index':53, 'state':0 }
+stations[40460] = { 'name':' Merchandise Mart (Brown & Purple lines)', 'eta':[], 'led_index':54, 'state':0 }
+stations[40710] = { 'name':' Chicago (Brown & Purple lines)', 'eta':[], 'led_index':55, 'state':0 }
+stations[40530] = { 'name':' Diversey (Brown & Purple lines)', 'eta':[], 'led_index':56, 'state':0 }
+stations[40850] = { 'name':' Harold Washington Library-State/Van Buren (Brown Orange Purple & Pink lines)', 'eta':[], 'led_index':57, 'state':0 }
+stations[41020] = { 'name':' Logan Square (Blue Line)', 'eta':[], 'led_index':58, 'state':0 }
+stations[41030] = { 'name':' Polk (Pink Line)', 'eta':[], 'led_index':59, 'state':0 }
+stations[41300] = { 'name':' Loyola (Red Line)', 'eta':[], 'led_index':60, 'state':0 }
+stations[40310] = { 'name':' Western (Orange Line)', 'eta':[], 'led_index':61, 'state':0 }
+stations[40430] = { 'name':' Clinton (Blue Line)', 'eta':[], 'led_index':62, 'state':0 }
+stations[40320] = { 'name':' Division (Blue Line)', 'eta':[], 'led_index':63, 'state':0 }
+stations[41510] = { 'name':' Morgan (Green & Pink lines)', 'eta':[], 'led_index':64, 'state':0 }
+stations[40270] = { 'name':' Main (Purple Line)', 'eta':[], 'led_index':65, 'state':0 }
+stations[41330] = { 'name':' Montrose (Blue Line)', 'eta':[], 'led_index':66, 'state':0 }
+stations[40350] = { 'name':' UIC-Halsted (Blue Line)', 'eta':[], 'led_index':67, 'state':0 }
+stations[40940] = { 'name':' Halsted (Green Line)', 'eta':[], 'led_index':68, 'state':0 }
+stations[41480] = { 'name':' Western (Brown Line)', 'eta':[], 'led_index':69, 'state':0 }
+stations[40030] = { 'name':' Pulaski (Green Line)', 'eta':[], 'led_index':70, 'state':0 }
+stations[41190] = { 'name':' Jarvis (Red Line)', 'eta':[], 'led_index':71, 'state':0 }
+stations[41170] = { 'name':' Garfield (Red Line)', 'eta':[], 'led_index':72, 'state':0 }
+stations[40050] = { 'name':' Davis (Purple Line)', 'eta':[], 'led_index':73, 'state':0 }
+stations[40750] = { 'name':' Harlem (Blue Line - OHare Branch)', 'eta':[], 'led_index':74, 'state':0 }
+stations[41200] = { 'name':' Argyle (Red Line)', 'eta':[], 'led_index':75, 'state':0 }
+stations[40440] = { 'name':' California (Pink Line)', 'eta':[], 'led_index':76, 'state':0 }
+stations[40360] = { 'name':' Southport (Brown Line)', 'eta':[], 'led_index':77, 'state':0 }
+stations[40760] = { 'name':' Granville (Red Line)', 'eta':[], 'led_index':78, 'state':0 }
+stations[40480] = { 'name':' Cicero (Green Line)', 'eta':[], 'led_index':79, 'state':0 }
+stations[40730] = { 'name':' Washington/Wells (Brown Orange Purple & Pink lines)', 'eta':[], 'led_index':80, 'state':0 }
+stations[40580] = { 'name':' 54th/Cermak (Pink Line)', 'eta':[], 'led_index':81, 'state':0 }
+stations[40650] = { 'name':' North/Clybourn (Red Line)', 'eta':[], 'led_index':82, 'state':0 }
+stations[40220] = { 'name':' Western (Blue Line - Forest Park Branch)', 'eta':[], 'led_index':83, 'state':0 }
+stations[40070] = { 'name':' Jackson (Blue Line)', 'eta':[], 'led_index':84, 'state':0 }
+stations[41440] = { 'name':' Addison (Brown Line)', 'eta':[], 'led_index':85, 'state':0 }
+stations[41670] = { 'name':' Conservatory (Green Line)', 'eta':[], 'led_index':86, 'state':0 }
+stations[40790] = { 'name':' Monroe (Blue Line)', 'eta':[], 'led_index':87, 'state':0 }
+stations[40180] = { 'name':' Oak Park (Blue Line)', 'eta':[], 'led_index':88, 'state':0 }
+stations[40400] = { 'name':' Noyes (Purple Line)', 'eta':[], 'led_index':89, 'state':0 }
+stations[41260] = { 'name':' Austin (Green Line)', 'eta':[], 'led_index':90, 'state':0 }
+stations[40600] = { 'name':' Kostner (Pink Line)', 'eta':[], 'led_index':91, 'state':0 }
+stations[40670] = { 'name':' Western (Blue Line - OHare Branch)', 'eta':[], 'led_index':92, 'state':0 }
+stations[40100] = { 'name':' Morse (Red Line)', 'eta':[], 'led_index':93, 'state':0 }
+stations[40770] = { 'name':' Lawrence (Red Line)', 'eta':[], 'led_index':94, 'state':0 }
+stations[40150] = { 'name':' Pulaski (Pink Line)', 'eta':[], 'led_index':95, 'state':0 }
+stations[40660] = { 'name':' Armitage (Brown & Purple lines)', 'eta':[], 'led_index':96, 'state':0 }
+stations[40540] = { 'name':' Wilson (Red & Purple lines)', 'eta':[], 'led_index':97, 'state':0 }
+stations[40380] = { 'name':' Clark/Lake (Blue Brown Green Orange Purple & Pink lines)', 'eta':[], 'led_index':98, 'state':0 }
+stations[40160] = { 'name':' LaSalle/Van Buren (Brown Orange Purple & Pink lines)', 'eta':[], 'led_index':99, 'state':0 }
+stations[40700] = { 'name':' Laramie (Green Line)', 'eta':[], 'led_index':100, 'state':0 }
+stations[40240] = { 'name':' 79th (Red Line)', 'eta':[], 'led_index':101, 'state':0 }
+stations[40290] = { 'name':' Ashland/63rd (Green Line)', 'eta':[], 'led_index':102, 'state':0 }
+stations[40450] = { 'name':' 95th/Dan Ryan (Red Line)', 'eta':[], 'led_index':103, 'state':0 }
+stations[40210] = { 'name':' Damen (Pink Line)', 'eta':[], 'led_index':104, 'state':0 }
+stations[41140] = { 'name':' King Drive (Green Line)', 'eta':[], 'led_index':105, 'state':0 }
+stations[41710] = { 'name':' Damen (Green Line)', 'eta':[], 'led_index':106, 'state':0 }
+stations[40980] = { 'name':' Harlem (Blue Line - Forest Park Branch)', 'eta':[], 'led_index':107, 'state':0 }
+stations[41270] = { 'name':' 43rd (Green Line)', 'eta':[], 'led_index':108, 'state':0 }
+stations[40080] = { 'name':' Sheridan (Red Line)', 'eta':[], 'led_index':109, 'state':0 }
+stations[40610] = { 'name':' Ridgeland (Green Line)', 'eta':[], 'led_index':110, 'state':0 }
+stations[41070] = { 'name':' Kedzie (Green Line)', 'eta':[], 'led_index':111, 'state':0 }
+stations[41430] = { 'name':' 87th (Red Line)', 'eta':[], 'led_index':112, 'state':0 }
+stations[41250] = { 'name':' Central (Purple Line)', 'eta':[], 'led_index':113, 'state':0 }
+stations[40880] = { 'name':' Thorndale (Red Line)', 'eta':[], 'led_index':114, 'state':0 }
+stations[41680] = { 'name':' Oakton-Skokie (Yellow Line)', 'eta':[], 'led_index':115, 'state':0 }
+stations[41120] = { 'name':' 35th-Bronzeville-IIT (Green Line)', 'eta':[], 'led_index':116, 'state':0 }
+stations[41460] = { 'name':' Irving Park (Brown Line)', 'eta':[], 'led_index':117, 'state':0 }
+stations[41220] = { 'name':' Fullerton (Red Brown & Purple lines)', 'eta':[], 'led_index':118, 'state':0 }
+stations[40990] = { 'name':' 69th (Red Line)', 'eta':[], 'led_index':119, 'state':0 }
+stations[41040] = { 'name':' Kedzie (Pink Line)', 'eta':[], 'led_index':120, 'state':0 }
+stations[40800] = { 'name':' Sedgwick (Brown & Purple lines)', 'eta':[], 'led_index':121, 'state':0 }
+stations[40060] = { 'name':' Belmont (Blue Line)', 'eta':[], 'led_index':122, 'state':0 }
+stations[40840] = { 'name':' South Boulevard (Purple Line)', 'eta':[], 'led_index':123, 'state':0 }
+stations[40170] = { 'name':' Ashland (Green & Pink lines)', 'eta':[], 'led_index':124, 'state':0 }
+stations[40810] = { 'name':' Illinois Medical District (Blue Line)', 'eta':[], 'led_index':125, 'state':0 }
+stations[41230] = { 'name':' 47th (Red Line)', 'eta':[], 'led_index':126, 'state':0 }
+stations[41500] = { 'name':' Montrose (Brown Line)', 'eta':[], 'led_index':127, 'state':0 }
+stations[40930] = { 'name':' Midway (Orange Line)', 'eta':[], 'led_index':128, 'state':0 }
+stations[40550] = { 'name':' Irving Park (Blue Line)', 'eta':[], 'led_index':129, 'state':0 }
+stations[40370] = { 'name':' Washington (Blue Line)', 'eta':[], 'led_index':130, 'state':0 }
+stations[40890] = { 'name':' OHare (Blue Line)', 'eta':[], 'led_index':131, 'state':0 }
+stations[40630] = { 'name':' Clark/Division (Red Line)', 'eta':[], 'led_index':132, 'state':0 }
+stations[41420] = { 'name':' Addison (Red Line)', 'eta':[], 'led_index':133, 'state':0 }
+stations[41290] = { 'name':' Kimball (Brown Line)', 'eta':[], 'led_index':134, 'state':0 }
+stations[40300] = { 'name':' Indiana (Green Line)', 'eta':[], 'led_index':135, 'state':0 }
+stations[40420] = { 'name':' Cicero (Pink Line)', 'eta':[], 'led_index':136, 'state':0 }
+stations[40720] = { 'name':' Cottage Grove (Green Line)', 'eta':[], 'led_index':137, 'state':0 }
+stations[41380] = { 'name':' Bryn Mawr (Red Line)', 'eta':[], 'led_index':138, 'state':0 }
+stations[41450] = { 'name':' Chicago (Red Line)', 'eta':[], 'led_index':139, 'state':0 }
+stations[40590] = { 'name':' Damen (Blue Line)', 'eta':[], 'led_index':140, 'state':0 }
+stations[41180] = { 'name':' Kedzie (Brown Line)', 'eta':[], 'led_index':141, 'state':0 }
+stations[40010] = { 'name':' Austin (Blue Line)', 'eta':[], 'led_index':142, 'state':0 }
+stations[41310] = { 'name':' Paulina (Brown Line)', 'eta':[], 'led_index':143, 'state':0 }
+stations[40970] = { 'name':' Cicero (Blue Line)', 'eta':[], 'led_index':144, 'state':0 }

examples/src/micropython-webserver/main.py

@@ -0,0 +1,239 @@
+from time import time, gmtime, mktime,sleep
+import network, machine, ntptime, socket, json, requests,neopixel
+
+def time_from_iso(datetime_str):
+    [yyyy, mm, dd] = [int(i) for i in datetime_str.split('T')[0].split('-')]
+    [h,m,s] = [int(i) for i in datetime_str.split('T')[1].split(':')]
+    time_u = mktime((yyyy, mm, dd, h, m, s, 0, 0))
+    return time_u
+
+def start_ap():
+    # Sets up initial captive portal for configuring wifi and basic options
+    ap = network.WLAN(network.AP_IF)
+    ap.active(True)
+
+    ap.config(
+        essid="CTA-Setup",
+        authmode=network.AUTH_OPEN
+    )
+
+    print("AP active for initial setup: ", ap.active())
+    print("AP IP address:", ap.ifconfig()[0])
+
+    return ap
+
+def parse_form_data(body):
+    """Parse URL-encoded form data"""
+    data = {}
+    pairs = body.split("&")
+    for pair in pairs:
+        if "=" in pair:
+            key, value = pair.split("=", 1)
+            # URL decode
+            data[key] = value.replace("+", " ").replace("%40", "@")
+    return data
+
+def save_config(data):
+    """Save Wi-Fi credentials to config.json"""
+    if not data.get("SSID"):
+        raise ValueError("SSID is required")
+    
+    config = {
+        "SSID": data.get("SSID"),
+        "PASS": data.get("PASS", ""),
+        "APIKEY": data.get("APIKEY", ""),
+        "LStation": data.get("LStation", ""),
+        "RStation": data.get("RStation", "")
+    }
+    
+    with open("config.json", "w") as f:
+        json.dump(config, f)
+    
+    print("Configuration saved:", config)
+
+def start_http_server():
+    addr = socket.getaddrinfo("0.0.0.0", 80)[0][-1]
+    s = socket.socket()
+    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    s.bind(addr)
+    s.listen(1)
+
+    print("HTTP server listening on port 80")
+
+    while True:
+        try:
+            conn, addr = s.accept()
+            request = conn.recv(2048).decode()
+
+            if request.startswith("POST /save"):
+                # Handle form submission
+                body = request.split("\r\n\r\n", 1)[1]
+                form_data = parse_form_data(body)
+                save_config(form_data)
+
+                response_body = """<!DOCTYPE html>
+<html>
+<head>
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Setup Complete</title>
+    <style>
+        body { font-family: sans-serif; padding: 16px; text-align: center; }
+        h2 { color: #28a745; }
+    </style>
+</head>
+<body>
+    <h2>Configuration saved</h2>
+    <p>Device will reboot and connect to Wi-Fi.</p>
+    <p><small>You can close this window.</small></p>
+</body>
+</html>"""
+            else:
+                # Serve the setup page for any other request
+                try:
+                    with open("portal.html") as f:
+                        response_body = f.read()
+                except:
+                    response_body = "<h1>Setup Page Not Found</h1><p>Please upload portal.html</p>"
+
+            response = (
+                "HTTP/1.1 200 OK\r\n"
+                "Content-Type: text/html\r\n"
+                "Connection: close\r\n\r\n"
+                + response_body
+            )
+
+            conn.send(response.encode())
+
+        except Exception as e:
+            print("HTTP error:", e)
+            try:
+                error = f"<h2>Error</h2><p>{e}</p>"
+                conn.send(
+                    "HTTP/1.1 500 Internal Server Error\r\n"
+                    "Content-Type: text/html\r\n"
+                    "Connection: close\r\n\r\n"
+                    .encode() + error.encode()
+                )
+            except:
+                pass
+        finally:
+            try:
+                conn.close()
+            except:
+                pass
+
+def reconnect_wifi():
+    while not wlan.isconnected():
+        try:
+            wlan.connect(SSID, PASS)
+            max_wait = 10
+            while max_wait > 0:
+                if wlan.isconnected():
+                    break
+                max_wait -= 1
+                print('Waiting for connection...')
+                sleep(1)
+            if wlan.isconnected():
+                print('Connected to Wi-Fi')
+                print('Network config:', wlan.ifconfig())
+                break
+        except Exception as e:
+            print('Connection error:', e)
+        print('Retrying connection...')
+        sleep(2)
+
+# Synchronize time of RTC with NTP
+last_ntp_sync = -3700 # Init as more than an hour ago
+last_api_query = mktime([2000,1,1,0,0,0,0,0]) # Set last query default (will run on first run)
+query_period = 120 # Query the API at most every 2 minutes
+distance_on = 10 # Time from station before turning on LED
+distance_half = 30 # Time from station before going 'half' on
+
+stations = {}
+
+# Setup Neopixel
+p = machine.Pin(20)   # connected on pin 20
+wled = neopixel.NeoPixel(p,2)
+wled[0] = (0,0,0)
+wled[1] = (0,0,0)
+wled.write()
+
+# Check if already configured and load config for Wifi, API Key etc.
+try:
+    with open("config.json", "r") as f:
+        config = json.load(f)
+    APIKEY = config["APIKEY"]
+    SSID = config["SSID"]
+    PASS = config["PASS"]
+    # Allocate first and second station in demo only
+    stations[0] = { 'id':config["LStation"], 'eta':[] }
+    stations[1] = { 'id':config["RStation"], 'eta':[] }
+    wlan = network.WLAN(network.STA_IF)
+    wlan.active(True)
+    reconnect_wifi()
+    
+    # need to make below multithreaded....
+    #start_http_server()   # Still launch server to allow changing SSID and config
+    demo = False
+except:
+    # Failed to open file, launch AP mode
+    start_ap()
+    start_http_server()
+
+    # Halt waiting for config
+    while(True):
+        sleep(5)
+
+while(True):
+    # Synchronise NTP time if hasn't been done in 1 hour
+    if (time() - last_ntp_sync) > 3600:
+        reconnect_wifi()
+        try:
+            ntptime.settime()
+            print("Time synchronized successfully")
+            last_ntp_sync = time()
+        except Exception as e:
+            print("Error synchronizing time:", e)
+            
+    # Have we queried API in the query_period seconds?
+    if (time() - last_api_query) > query_period:
+        # Query updated API
+        #trains = (requests.get("https://lapi.transitchicago.com/api/1.0/ttpositions.aspx?key="+APIKEY+"&rt=Blue&outputType=JSON")).json()['ctatt']
+        # Query all stations
+        for station,dict in stations.items():
+            trains_s = (requests.get(f"https://lapi.transitchicago.com/api/1.0/ttarrivals.aspx?key={APIKEY}&mapid={dict['id']}&outputType=JSON")).json()['ctatt']
+        
+            # Timestamps are served in local Chicago time, convert to GMT for simplicity on this side.
+            #print(f"Time of poll is: "+str(gmtime(time_from_iso(trains_s['tmst'])+(5*60*60))))
+        
+            # Loop through all trains and update matching stations
+            for train in trains_s['eta']:
+                eta_time = time_from_iso(train['arrT'])+(5*60*60)
+                
+                # Append the ETA, we rely on the station loop to remove old trains
+                stations[station]['eta'].append(eta_time)
+        
+        
+        last_api_query = time() # uptime polling window
+    
+    # Process the ETA for each station 
+    for station, value in stations.items(): # loop through all stations          
+        for index, eta in enumerate(value['eta']):   # multiple trains. Find old trains
+            if (eta - time()) < -distance_on: # Remove old trains
+                stations[station]['eta'].pop(index)
+            
+        # Set LED state tracker to 0, if no trains, it'll stay 0.
+        eta = min(value['eta'])
+        time_from_now = eta - time()
+        print(f"Next train will arrive at {value['id']} in {str(time_from_now)} seconds")
+        if time_from_now < distance_on: 
+            wled[station] = (255,0,0)
+        elif time_from_now < distance_half:
+            wled[station] = (255,100,0)
+        else:
+            wled[station] = (0,0,0)
+
+    # Once all LEDs updated
+    wled.write()
+
+    sleep(1)

examples/src/micropython-webserver/portal.html

@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<html>
+    <head>
+   <meta name="viewport" content="width=device-width, initial-scale=1">
+   <title>Device Setup</title>
+   <style>
+       body {
+           font-family: sans-serif;
+           padding: 16px;
+           max-width: 400px;
+           margin: 0 auto;
+       }
+       h2 {
+           margin-top: 0;
+       }
+       label {
+           display: block;
+           margin-top: 12px;
+           font-weight: bold;
+       }
+       input, button {
+           width: 100%;
+           padding: 10px;
+           margin-top: 6px;
+           font-size: 16px;
+           box-sizing: border-box;
+       }
+       button {
+           margin-top: 20px;
+           background: #007bff;
+           color: white;
+           border: none;
+           cursor: pointer;
+       }
+       button:hover {
+           background: #0056b3;
+       }
+   </style>
+</head>
+<body>
+   <h2>Device Setup</h2>
+
+   <form method="POST" action="/save">
+       <label>
+           Wi-Fi SSID
+           <input name="SSID" required>
+       </label>
+
+       <label>
+           Password
+           <input name="PASS" type="password">
+       </label>
+
+       <label>
+           CTA API Key
+           <input name="APIKEY">
+       </label>
+
+       <label>
+           Left LED Station: 
+           <select name="LStation"><option value=41090>Monroe (Red Line)</option><option value=41010>Rockwell (Brown Line)</option><option value=40470>Racine (Blue Line)</option><option value=40190>Sox-35th (Red Line)</option><option value=40020>Harlem/Lake (Green Line)</option><option value=40900>Howard (Red Purple & Yellow lines)</option><option value=41160>Clinton (Green & Pink lines)</option><option value=40230>Cumberland (Blue Line)</option><option value=40560>Jackson (Red Line)</option><option value=41150>Kedzie (Orange Line)</option><option value=40780>Central Park (Pink Line)</option><option value=41080>47th (Green Line)</option><option value=40510>Garfield (Green Line)</option><option value=41050>Linden (Purple Line)</option><option value=40120>35th/Archer (Orange Line)</option><option value=40570>California (Blue Line)</option><option value=40260>State/Lake (Brown Green Orange Pink & Purple lines)</option><option value=40130>51st (Green Line)</option><option value=41700>Washington/Wabash (Brown Green Orange Purple & Pink lines)</option><option value=41000>Cermak-Chinatown (Red Line)</option><option value=40340>Berwyn (Red Line)</option><option value=41690>Cermak-McCormick Place (Green Line)</option><option value=40490>Grand (Blue Line)</option><option value=41060>Ashland (Orange Line)</option><option value=40090>Damen (Brown Line)</option><option value=41280>Jefferson Park (Blue Line)</option><option value=40520>Foster (Purple Line)</option><option value=40330>Grand (Red Line)</option><option value=40280>Central (Green Line)</option><option value=40250>Kedzie-Homan (Blue Line)</option><option value=40870>Francisco (Brown Line)</option><option value=41240>Addison (Blue Line)</option><option value=40740>Western (Pink Line)</option><option value=41360>California (Green Line)</option><option value=41400>Roosevelt (Red Orange & Green lines)</option><option value=41410>Chicago (Blue Line)</option><option value=40680>Adams/Wabash (Brown Green Orange Pink & Purple lines)</option><option value=40920>Pulaski (Blue Line)</option><option value=41210>Wellington (Brown & Purple lines)</option><option value=41340>LaSalle (Blue Line)</option><option value=41490>Harrison (Red Line)</option><option value=41350>Oak Park (Green Line)</option><option value=40040>Quincy/Wells (Brown Orange Purple & Pink lines)</option><option value=40390>Forest Park (Blue Line)</option><option value=41130>Halsted (Orange Line)</option><option value=40960>Pulaski (Orange Line)</option><option value=40830>18th (Pink Line)</option><option value=40140>Dempster-Skokie \xa0(Yellow Line)</option><option value=41320>Belmont (Red Brown & Purple lines)</option><option value=41660>Lake (Red Line)</option><option value=40910>63rd (Red Line)</option><option value=40690>Dempster (Purple Line)</option><option value=40460>Merchandise Mart (Brown & Purple lines)</option><option value=40710>Chicago (Brown & Purple lines)</option><option value=40530>Diversey (Brown & Purple lines)</option><option value=40850>Harold Washington Library-State/Van Buren (Brown Orange Purple & Pink lines)</option><option value=41020>Logan Square (Blue Line)</option><option value=41030>Polk (Pink Line)</option><option value=41300>Loyola (Red Line)</option><option value=40310>Western (Orange Line)</option><option value=40430>Clinton (Blue Line)</option><option value=40320>Division (Blue Line)</option><option value=41510>Morgan (Green & Pink lines)</option><option value=40270>Main (Purple Line)</option><option value=41330>Montrose (Blue Line)</option><option value=40350>UIC-Halsted (Blue Line)</option><option value=40940>Halsted (Green Line)</option><option value=41480>Western (Brown Line)</option><option value=40030>Pulaski (Green Line)</option><option value=41190>Jarvis (Red Line)</option><option value=41170>Garfield (Red Line)</option><option value=40050>Davis (Purple Line)</option><option value=40750>Harlem (Blue Line - OHare Branch)</option><option value=41200>Argyle (Red Line)</option><option value=40440>California (Pink Line)</option><option value=40360>Southport (Brown Line)</option><option value=40760>Granville (Red Line)</option><option value=40480>Cicero (Green Line)</option><option value=40730>Washington/Wells (Brown Orange Purple & Pink lines)</option><option value=40580>54th/Cermak (Pink Line)</option><option value=40650>North/Clybourn (Red Line)</option><option value=40220>Western (Blue Line - Forest Park Branch)</option><option value=40070>Jackson (Blue Line)</option><option value=41440>Addison (Brown Line)</option><option value=41670>Conservatory (Green Line)</option><option value=40790>Monroe (Blue Line)</option><option value=40180>Oak Park (Blue Line)</option><option value=40400>Noyes (Purple Line)</option><option value=41260>Austin (Green Line)</option><option value=40600>Kostner (Pink Line)</option><option value=40670>Western (Blue Line - OHare Branch)</option><option value=40100>Morse (Red Line)</option><option value=40770>Lawrence (Red Line)</option><optiLine truncated
+       </label>
+
+        <label>
+           Right LED Station: 
+           <select name="RStation"><option value=41090>Monroe (Red Line)</option><option value=41010>Rockwell (Brown Line)</option><option value=40470>Racine (Blue Line)</option><option value=40190>Sox-35th (Red Line)</option><option value=40020>Harlem/Lake (Green Line)</option><option value=40900>Howard (Red Purple & Yellow lines)</option><option value=41160>Clinton (Green & Pink lines)</option><option value=40230>Cumberland (Blue Line)</option><option value=40560>Jackson (Red Line)</option><option value=41150>Kedzie (Orange Line)</option><option value=40780>Central Park (Pink Line)</option><option value=41080>47th (Green Line)</option><option value=40510>Garfield (Green Line)</option><option value=41050>Linden (Purple Line)</option><option value=40120>35th/Archer (Orange Line)</option><option value=40570>California (Blue Line)</option><option value=40260>State/Lake (Brown Green Orange Pink & Purple lines)</option><option value=40130>51st (Green Line)</option><option value=41700>Washington/Wabash (Brown Green Orange Purple & Pink lines)</option><option value=41000>Cermak-Chinatown (Red Line)</option><option value=40340>Berwyn (Red Line)</option><option value=41690>Cermak-McCormick Place (Green Line)</option><option value=40490>Grand (Blue Line)</option><option value=41060>Ashland (Orange Line)</option><option value=40090>Damen (Brown Line)</option><option value=41280>Jefferson Park (Blue Line)</option><option value=40520>Foster (Purple Line)</option><option value=40330>Grand (Red Line)</option><option value=40280>Central (Green Line)</option><option value=40250>Kedzie-Homan (Blue Line)</option><option value=40870>Francisco (Brown Line)</option><option value=41240>Addison (Blue Line)</option><option value=40740>Western (Pink Line)</option><option value=41360>California (Green Line)</option><option value=41400>Roosevelt (Red Orange & Green lines)</option><option value=41410>Chicago (Blue Line)</option><option value=40680>Adams/Wabash (Brown Green Orange Pink & Purple lines)</option><option value=40920>Pulaski (Blue Line)</option><option value=41210>Wellington (Brown & Purple lines)</option><option value=41340>LaSalle (Blue Line)</option><option value=41490>Harrison (Red Line)</option><option value=41350>Oak Park (Green Line)</option><option value=40040>Quincy/Wells (Brown Orange Purple & Pink lines)</option><option value=40390>Forest Park (Blue Line)</option><option value=41130>Halsted (Orange Line)</option><option value=40960>Pulaski (Orange Line)</option><option value=40830>18th (Pink Line)</option><option value=40140>Dempster-Skokie \xa0(Yellow Line)</option><option value=41320>Belmont (Red Brown & Purple lines)</option><option value=41660>Lake (Red Line)</option><option value=40910>63rd (Red Line)</option><option value=40690>Dempster (Purple Line)</option><option value=40460>Merchandise Mart (Brown & Purple lines)</option><option value=40710>Chicago (Brown & Purple lines)</option><option value=40530>Diversey (Brown & Purple lines)</option><option value=40850>Harold Washington Library-State/Van Buren (Brown Orange Purple & Pink lines)</option><option value=41020>Logan Square (Blue Line)</option><option value=41030>Polk (Pink Line)</option><option value=41300>Loyola (Red Line)</option><option value=40310>Western (Orange Line)</option><option value=40430>Clinton (Blue Line)</option><option value=40320>Division (Blue Line)</option><option value=41510>Morgan (Green & Pink lines)</option><option value=40270>Main (Purple Line)</option><option value=41330>Montrose (Blue Line)</option><option value=40350>UIC-Halsted (Blue Line)</option><option value=40940>Halsted (Green Line)</option><option value=41480>Western (Brown Line)</option><option value=40030>Pulaski (Green Line)</option><option value=41190>Jarvis (Red Line)</option><option value=41170>Garfield (Red Line)</option><option value=40050>Davis (Purple Line)</option><option value=40750>Harlem (Blue Line - OHare Branch)</option><option value=41200>Argyle (Red Line)</option><option value=40440>California (Pink Line)</option><option value=40360>Southport (Brown Line)</option><option value=40760>Granville (Red Line)</option><option value=40480>Cicero (Green Line)</option><option value=40730>Washington/Wells (Brown Orange Purple & Pink lines)</option><option value=40580>54th/Cermak (Pink Line)</option><option value=40650>North/Clybourn (Red Line)</option><option value=40220>Western (Blue Line - Forest Park Branch)</option><option value=40070>Jackson (Blue Line)</option><option value=41440>Addison (Brown Line)</option><option value=41670>Conservatory (Green Line)</option><option value=40790>Monroe (Blue Line)</option><option value=40180>Oak Park (Blue Line)</option><option value=40400>Noyes (Purple Line)</option><option value=41260>Austin (Green Line)</option><option value=40600>Kostner (Pink Line)</option><option value=40670>Western (Blue Line - OHare Branch)</option><option value=40100>Morse (Red Line)</option><option value=40770>Lawrence (Red Line)</option><optiLine truncated
+       </label>
+
+       <button type="submit">Save & Connect</button>
+   </form>
+</body>
+   </html>