fix(docs): Mention u-name and non-u-name modules in Documentation

Documentation/pycardium/bhi160.rst

@@ -28,18 +28,18 @@ The coordinate system of the BHI160 sensor data looks like this:
 .. code-block:: python
 
    import bhi160
-   import utime
+   import time
 
    bhi = bhi160.BHI160Orientation()
 
     while True:
         samples = bhi.read()
         if len(samples) == 0:
-            utime.sleep(0.25)
+            time.sleep(0.25)
             continue
         # print the latest sample
         print(samples[-1])
-        utime.sleep(0.25)
+        time.sleep(0.25)
 
 
 Orientation

Documentation/pycardium/bme680.rst

@@ -8,7 +8,7 @@ Allows access to environmental data of card10's surroundings.
 
 .. code-block:: python
 
-   import bme680, utime
+   import bme680, time
 
    with bme680.Bme680() as environment:
        while True:
@@ -19,7 +19,7 @@ Allows access to environmental data of card10's surroundings.
            print("Pressure:       {:10.2f} hPa".format(d.pressure))
            print("Gas Resistance: {:10.2f} Ω".format(d.resistance))
 
-           utime.sleep(1)
+           time.sleep(1)
 
 Sensor Class
 ------------

Documentation/pycardium/stdlib.rst

 MicroPython Standard Library
 ============================
-Pycardium contains some modules from the MicroPython standard library.  These
-are:
+Pycardium contains some modules from the MicroPython standard library.
+
+Some modules below use a standard Python name, but prefixed with “u”,
+e.g. ujson instead of json. This is to signify that such a module is a
+micro-library, i.e. implements only a subset of CPython module
+functionality. Please refer to the official `MicroPython docs`_ for an
+explanation why.
+
+All u-name modules can also be imported using their non-u-name. E.g.
+``import utime`` and import ``import time`` will both work.
+
+.. _MicroPython docs: http://docs.micropython.org/en/latest/library/index.html#python-standard-libraries-and-micro-libraries
 
 .. py:module:: framebuf
 

Documentation/pycardium/utime.rst

@@ -8,6 +8,9 @@ CPython but wouldn't fit anywhere else in our implementation.  Most
 prominently,  this is the :py:func:`utime.alarm` function for setting an RTC
 alarm.
 
+Like all other u-name modules, ``utime`` can also imported using the standard
+``import time`` statement.
+
 .. |time| replace:: ``time``
 .. _time: https://docs.python.org/3/library/time.html
 
@@ -135,13 +138,13 @@ alarm.
 
    .. code-block:: python
 
-      import utime
+      import time
 
       def minute_timer(x):
-         current = utime.time()
+         current = time.time()
          print("Current: " + str(current))
          alarm = (current // 60 + 1) * 60
-         utime.alarm(alarm, minute_timer)
+         time.alarm(alarm, minute_timer)
 
       minute_timer(None)
 
@@ -150,13 +153,13 @@ alarm.
 
    .. code-block:: python
 
-      import interrupt, utime
+      import interrupt, time
 
       def 5_second_timer(x):
-         current = utime.time()
+         current = time.time()
          print("Current: " + str(current))
          alarm = (current // 10) * 10 + 5
-         utime.alarm(alarm)
+         time.alarm(alarm)
 
       # This time, we need to register and enable the callback manually
       interrupt.set_callback(interrupt.RTC_ALARM, 5_second_timer)

Documentation/pycardium/ws2812.rst

@@ -19,7 +19,7 @@ The ``ws2812`` module controls LEDs of the WS2812 type. Just as the ``leds`` mod
 
    .. code-block:: python
 
-      import color, utime, ws2812, gpio
+      import color, time, ws2812, gpio
 
       i = 0
       while True:
@@ -28,6 +28,6 @@ The ``ws2812`` module controls LEDs of the WS2812 type. Just as the ``leds`` mod
           col3 = color.from_hsv((i + 40) % 360, 1.0, 0.1)
           ws2812.set_all(gpio.WRISTBAND_2, [col1, col2, col3])
           i += 1
-          utime.sleep_ms(10)
+          time.sleep_ms(10)
 
    .. versionadded:: 1.10