ucloud: Update module imports.

Author: iabdalkader

README.md

@@ -1,8 +1,28 @@
-# Arduino IoT Cloud Micro/Python client ☁️🐍☁️
-Arduino IoT cloud client for Python and MicroPython.
+# Arduino IoT Cloud Python client ☁️🐍☁️
+This is a Python client for the Arduino IoT cloud, which runs on both CPython and MicroPython. The client supports authentication via username and password, or key/certificate pair stored on the filesystem or in a secure element.
+
+## Minimal Example
+The following minimal example shows how to control an LED from the dashboard using a switch widget. It first creates a client object which is used to register the LED and Switch objects, and start the client.
+```python
+# Switch callback, toggles the LED
+def led_toggle(client, value):
+    client["led"] = value
+
+# 1. Create the client, using basic username and password authentication.
+client = AIOTClient(device_id=b"DEVICE_ID", username=b"DEVICE_ID", password=b"SECRET_KEY")
+
+# 2. Register some cloud objects.
+client.register("led", value=None)
+client.register("sw1", value=None, on_write=led_toggle)
+
+# 3. Start the Arduino cloud client.
+client.start()
+```
+
+For more detailed examples and advanced API features, please see the [examples](https://github.com/arduino/arduino-iot-cloud-py/tree/main/examples).
 
 ## Testing on CPython/Linux
-If a crypto device is available, the following steps can be skipped, otherwise Arduino IoT cloud can be tested on Linux using SoftHSM.
+The client supports basic authentication using a username and password, and the more advanced key/cert pair stored on filesystem or in a crypto device. To test this functionality, if a crypto device is not available, the following steps can be used to emulate one using SoftHSM.
 
 #### Create softhsm token
 Using the first available slot, in this case 0
@@ -52,8 +72,7 @@ python examples/example.py
 ```
 
 ## Testing on MicroPython
-MicroPython currently does Not support secure elements, the key and cert files must be stored in DER format on the filesystem.
-Convert the key and certificate to DER, using the following commands, and copy to the filesystem storage.
+MicroPython currently does Not support secure elements. The username and password can be used, or the key and cert files must be stored in DER format on the filesystem. To test the client on MicroPython, first convert the key and certificate to DER, using the following commands, then copy the files to the internal storage.
 
 #### Convert key and certificate to `.DER`
 ```bash
@@ -67,7 +86,6 @@ openssl x509 -in cert.pem -out cert.der -outform DER
 
 ## Useful links
 
-* [ulogging](https://github.com/iabdalkader/micropython-ulogging)
 * [senml-micropython](https://github.com/kpn-iot/senml-micropython-library)
 * [m2crypto](https://github.com/m2crypto/m2crypto)
 * [umqtt.simple](https://github.com/micropython/micropython-lib/tree/master/micropython/umqtt.simple)

arduino_iot_cloud/ucloud.py

@@ -5,17 +5,16 @@
 # file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 import time
+import logging
 from kpn_senml import SenmlPack
 from kpn_senml import SenmlRecord
 from arduino_iot_cloud.umqtt import MQTTClient
 
 try:
-    import logging
     import asyncio
     from asyncio import CancelledError
     from asyncio import InvalidStateError
 except ImportError:
-    import ulogging as logging
     import uasyncio as asyncio
     from uasyncio.core import CancelledError
 

arduino_iot_cloud/umqtt.py

@@ -22,20 +22,16 @@
 #
 # Based on: https://github.com/micropython/micropython-lib/tree/master/micropython/umqtt.simple
 
+import socket
+import struct
+import select
+import logging
+
 try:
     from ussl import wrap_socket
-    import usocket as socket
-    import ustruct as struct
-    import ulogging as logging
-    import uselect as select
 except ImportError:
-    import socket
-    import struct
-    import logging
-    import select
     from arduino_iot_cloud.ussl import wrap_socket
 
-
 class MQTTException(Exception):
     pass
 

examples/micropython.py

@@ -4,8 +4,8 @@
 import time
 import ussl
 import network
-import ulogging as logging
-from ulogging.ustrftime import strftime
+import logging
+from time import strftime
 from arduino_iot_cloud import AIOTClient
 from arduino_iot_cloud import Location
 from arduino_iot_cloud import Schedule