More intelligent wifi management on bootup.

boot.py

@@ -4,11 +4,23 @@
 # Copy config.example.py to config.py and modify to your needs first!
 import config
 
-from network import WLAN
-wifi = WLAN(mode=WLAN.STA)
-wifi.connect(config.HOME_SSID, auth=(WLAN.WPA, config.HOME_PASSWORD))
-
 from machine import UART
 from os import dupterm
 uart = UART(0, 115200)
 dupterm(uart)
+
+from network import WLAN
+wifi = WLAN()
+wifi.mode(WLAN.STA)
+ssids = wifi.scan()
+found = False
+for net in ssids:
+    print("Checking %s" % net.ssid)
+    if net.ssid == config.HOME_SSID:
+        print("Found %s!" % net.ssid)
+        wifi.connect(config.HOME_SSID, auth=(WLAN.WPA, config.HOME_PASSWORD))
+        found = True
+        break
+if not found:
+    print("No eligible WiFi found.")
+    wifi.mode(WLAN.AP)