Revert unnecessary changes

lib/sleep.py

@@ -2,14 +2,16 @@
 
 ___license___ = "MIT"
 
-import utime
+import time
 
 def sleep_ms(duration):
-    utime.sleep_ms(duration)
+    # todo: deepsleep?
+    time.sleep_ms(duration)
 
 def sleep(duration):
-    utime.sleep(duration)
+    # todo: deepsleep?
+    time.sleep(duration)
 
-def wfi(duration):
-    #todo: this is fake
-    sleep_ms(duration)
+def wfi():
+    # todo: this is fake
+    sleep_ms(1)

lib/wifi.py

@@ -76,7 +76,11 @@ def connect_wifi(details, timeout, wait=False):
         nic().connect(details['ssid'])
 
     if wait:
+        wait_until = time.ticks_ms() + timeout * 1000
         while not nic().isconnected():
+            #nic().update() # todo: do we need this?
+            if (time.ticks_ms() > wait_until):
+                raise OSError("Timeout while trying to connect to wifi")
             sleep.sleep_ms(100)