Updates for reliable NTP

examples/src/micropython/main.py

@@ -15,16 +15,10 @@ def time_from_iso(datetime_str):
     time_u = mktime((yyyy, mm, dd, h, m, s, 0, 0))
     return time_u
 
-def connect_wifi():
-    # Create network in station mode, activate it and connect
-    wlan = network.WLAN(network.STA_IF)
-
-    wlan.active(True)
-    wlan.connect(SSID, PASS)
-
+def reconnect_wifi():
     while not wlan.isconnected():
         try:
-            wlan.connect(ssid, password)
+            wlan.connect(SSID, PASS)
             max_wait = 10
             while max_wait > 0:
                 if wlan.isconnected():
@@ -47,7 +41,11 @@ def init_LEDs():
     led.off()
 
 # Connect Wifi
-connect_wifi()
+# Create network in station mode, activate it and connect
+wlan = network.WLAN(network.STA_IF)
+
+wlan.active(True)
+reconnect_wifi()
 
 # Synchronize time of RTC with NTP
 last_ntp_sync = -3700 # Init as more than an hour ago
@@ -209,6 +207,7 @@ init_LEDs()
 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")
@@ -218,6 +217,7 @@ while(True):
             
     # Have we queried API in the query_period seconds?
     if (time() - last_api_query) > query_period:
+        reconnect_wifi()
         # Query updated API
         trains = (requests.get("https://lapi.transitchicago.com/api/1.0/ttpositions.aspx?key="+APIKEY+"&rt=Blue&outputType=JSON")).json()['ctatt']