Tidied up random wireless example

examples/tiny_fx_w/README.md

@@ -4,13 +4,19 @@ These are micropython examples for the wireless functionality of the Pimoroni [T
 
 For examples that show off the rest of the board's functions, refer to the regular [TinyFX Micropython Examples](../tiny_fx/README.md)
 
-- [WiFi Examples](#wifi-examples)
-  - [Random Colour](#random-colour)
+- [Wireless Examples](#wireless-examples)
+  - [Random](#random)
 
 
-## WiFi Examples
+## Wireless Examples
 
-### Random Colour
-[wifi/random_colour.py](examples/wifi/random_colour.py)
+These examples requires a `secrets.py` file to be on your board's file system with the credentials of your WiFi network.
+
+### Random
+[wireless/random.py](examples/wireless/random.py)
 
 Show the state of TinyFX's Boot button on its RGB output.
+Show random colours and patterns obtained from the internet on TinyFX's outputs.
+
+
+

examples/tiny_fx_w/examples/wireless/random.py

@@ -0,0 +1,74 @@
+import time
+import network
+import requests
+from tiny_fx import TinyFX
+
+"""
+Show random colours and patterns obtained from the internet on TinyFX's outputs.
+
+This example requires a secrets.py file to be on your board's file system with the credentials of your WiFi network.
+
+Press "Boot" to exit the program.
+"""
+
+try:
+    from secrets import WIFI_SSID, WIFI_PASSWORD
+except ImportError:
+    print("Create secrets.py with your WiFi credentials")
+    raise
+
+
+# Constants
+MONO_NAMES = ("One", "Two", "Three", "Four", "Five", "Six")
+COLOUR_NAMES = ("R", "G", "B")
+CONNECTION_INTERVAL = 1.0               # The time to sleep between each connection check
+REQUEST_INTERVAL = 5.0                  # The time to sleep between each internet request
+
+# Variables
+tiny = TinyFX()                         # Create a new TinyFX object to interact with the board
+wlan = network.WLAN(network.STA_IF)     # Create a new network object for interacting with WiFI
+
+
+# Wrap the code in a try block, to catch any exceptions (including KeyboardInterrupt)
+try:
+    # Connect to WLAN
+    wlan.active(True)
+    wlan.connect(WIFI_SSID, WIFI_PASSWORD)
+
+    # Wait until the connection is established
+    while not wlan.isconnected():
+        print('Waiting for connection...')
+        time.sleep(CONNECTION_INTERVAL)
+
+    # Print out our IP address
+    print(f'Connected on {wlan.ifconfig()[0]}')
+
+    # Loop forever
+    while True:
+        # Get two colours from the internet
+        req = requests.get("https://random-flat-colors.vercel.app/api/random?count=2").json()
+
+        # Use the first to get brightness values for the six mono outputs
+        mono =  tuple(int(req['colors'][0][i:i + 1], 16) / 15 for i in range(1, 7))
+
+        # Use the second to get the colour components for the RGB output
+        colour =  tuple(int(req['colors'][1][i:i + 2], 16) for i in (1, 3, 5))
+
+        # Set the mono outputs, and print the values
+        for i in range(len(tiny.outputs)):
+            tiny.outputs[i].brightness(mono[i])
+            print(f"{MONO_NAMES[i]} = {round(mono[i], 2)}", end=", ")
+
+        # Set the colour output, and print the values
+        tiny.rgb.set_rgb(*colour)
+        for i in range(len(colour)):
+            print(f"{COLOUR_NAMES[i]} = {colour[i]}", end=", ")
+
+        print()
+
+        time.sleep(REQUEST_INTERVAL)
+
+# Turn off all the outputs
+finally:
+    tiny.shutdown()
+    wlan.disconnect()