Updates for asyncio logic example

examples/src/micropython-webserver/main.py

@@ -1,6 +1,6 @@
 from time import time, gmtime, mktime,sleep
-import network, machine, ntptime, socket, json, requests,neopixel, asyncio
+import network, machine, ntptime, socket, json, requests, neopixel, asyncio
-from microdot import Microdot
+from microdot import Microdot, send_file
 
 app = Microdot()
 
@@ -10,122 +10,47 @@ def time_from_iso(datetime_str):
     time_u = mktime((yyyy, mm, dd, h, m, s, 0, 0))
     return time_u
 
-def start_ap():
+@app.post('/save')
-    # Sets up initial captive portal for configuring wifi and basic options
+async def save(request):
-    ap = network.WLAN(network.AP_IF)
+    # Handle form submission
-    ap.active(True)
+    response = request.form
 
-    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"):
+    if not response["SSID"]:
         raise ValueError("SSID is required")
     
     config = {
-        "SSID": data.get("SSID"),
+        "SSID": response["SSID"],
-        "PASS": data.get("PASS", ""),
+        "PASS": response["PASS"],
-        "APIKEY": data.get("APIKEY", ""),
+        "APIKEY": response["APIKEY"],
-        "LStation": data.get("LStation", ""),
+        "LStation": response["LStation"],
-        "RStation": data.get("RStation", "")
+        "RStation": response["RStation"]
     }
     
     with open("config.json", "w") as f:
         json.dump(config, f)
 
-    print("Configuration saved:", config)
-
-@app.post('/save')
-async def save(request):
-    # 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>
+<title>Initial Setup Complete</title>
 <style>
     body { font-family: sans-serif; padding: 16px; text-align: center; }
     h2 { color: #28a745; }
 </style>
 </head>
 <body>
-<h2>Configuration saved</h2>
+<h2>Configuration Saved</h2>
-<p>Device will reboot and connect to Wi-Fi.</p>
+<p>Reboot device to attempt Wi-Fi connection.</p>
-<p><small>You can close this window.</small></p>
 </body>
 </html>"""
 
-    return response_body
+    return response_body, {'Content-Type': 'text/html'}
 
 @app.get('/')
 async def index(request):
-    try:
+    return send_file('portal.html')
-        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
-    )
-
-    return response
-
-
-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...')
-                asyncio.wait(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...')
-        asyncio.wait(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
@@ -138,78 +63,122 @@ wled.write()
 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()
+    while not wlan.isconnected():
-    
-    # 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()
-
-    # Halt waiting for config
-    while(True):
-        asyncio.wait(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()
+            wlan.connect(SSID, PASS)
-            print("Time synchronized successfully")
+            max_wait = 10
-            last_ntp_sync = time()
+            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: ', SSID)
+                print('Device IP Address:', wlan.ifconfig()[0])
+                break
         except Exception as e:
-            print("Error synchronizing time:", e)
+            print('Connection error:', e)
+        print('Retrying connection...')
+        sleep(2)
+except:
+    # Failed to open config file, launch AP mode and disable trains
+    demo = True
+    wlan = network.WLAN(network.AP_IF)
+    wlan.active(True)
 
-    # Have we queried API in the query_period seconds?
+    wlan.config(
-    if (time() - last_api_query) > query_period:
+        essid="CTA-Setup",
-        # Query updated API
+        authmode=network.AUTH_OPEN
-        #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("AP active for initial setup: ", wlan.active())
-            #print(f"Time of poll is: "+str(gmtime(time_from_iso(trains_s['tmst'])+(5*60*60))))
+    print("AP IP address:", wlan.ifconfig()[0])
-        
-            # 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
+async def CTA_Stations(config):
+    # Allocate first and second station
+    stations = {}
+    stations[0] = { 'id':config["LStation"], 'eta':[] }
+    stations[1] = { 'id':config["RStation"], 'eta':[] }
+    APIKEY = config["APIKEY"]
     
-    # Process the ETA for each station 
+    # Synchronize time of RTC with NTP
-    for station, value in stations.items(): # loop through all stations          
+    last_ntp_sync = -3700 # Init as more than an hour ago
-        for index, eta in enumerate(value['eta']):   # multiple trains. Find old trains
+    last_api_query = mktime([2000,1,1,0,0,0,0,0]) # Set last query default (will run on first run)
-            if (eta - time()) < -distance_on: # Remove old trains
+    query_period = 120 # Query the API at most every 2 minutes
-                stations[station]['eta'].pop(index)
+    distance_on = 10 # Time from station before turning on LED
+    distance_half = 30 # Time from station before going 'half' on
     
-        # Set LED state tracker to 0, if no trains, it'll stay 0.
+    while True:
-        eta = min(value['eta'])
+        if (time() - last_ntp_sync) > 3600:
-        time_from_now = eta - time()
+            #reconnect_wifi()
-        print(f"Next train will arrive at {value['id']} in {str(time_from_now)} seconds")
+            try:
-        if time_from_now < distance_on: 
+                ntptime.settime()
-            wled[station] = (255,0,0)
+                print("Time synchronized successfully")
-        elif time_from_now < distance_half:
+                last_ntp_sync = time()
-            wled[station] = (255,100,0)
+            except Exception as e:
-        else:
+                print("Error synchronizing time:", e)
+                
+        # Have we queried API in the query_period seconds?
+        if (time() - last_api_query) > query_period:
+            # Query all stations
+            for station,dict in stations.items():
+                request = f"https://lapi.transitchicago.com/api/1.0/ttarrivals.aspx?key={APIKEY}&mapid={dict['id']}&outputType=JSON"
+                trains_s = (requests.get(request)).json()['ctatt']
+
+                # Zeroize all existing ETAs
+                stations[station]['eta'] = []
+                
+                # Check if any trains, otherwise skip
+                if 'eta' in trains_s:
+                    # 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 default
             wled[station] = (0,0,0)
             
-    # Once all LEDs updated
+            if len(value['eta']) > 0:
-    wled.write()
+                # Get closest train
+                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)
 
-    asyncio.wait(1)
+        # Once all LEDs updated
+        wled.write()
 
+        await asyncio.sleep(1)
+
+async def main():
+    server = asyncio.create_task(app.start_server(port=80))
+    
+    # Only run if we have internet
+    if wlan.IF_STA:
+        asyncio.create_task(CTA_Stations(config))
+
+    await server
+
+
+asyncio.run(main())