Add manual control example

examples/manual.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+import sys
+import os
+from fanshim import FanShim
+
+FIFO_NAME = "/tmp/fanshim"
+
+fanshim = FanShim()
+fanshim.set_hold_time(1.0)
+fanshim.set_fan(False)
+
+try:
+    os.unlink(FIFO_NAME)
+except IOError:
+    pass
+
+os.mkfifo(FIFO_NAME)
+
+
+def handle_command(data):
+    if data == "on":
+        fanshim.set_fan(True)
+        print("Fan SHIM: Fan enabled")
+    elif data == "off":
+        fanshim.set_fan(False)
+        print("Fan SHIM: Fan disabled")
+    elif len(data) == 6:
+        r, g, b = data[0:2], data[2:4], data[4:6]
+        try:
+            r, g, b = [int(c, 16) for c in (r, g, b)]
+        except ValueError:
+            print("Fan SHIM: Invalid colour {c}".format(c=data))
+            return
+        print("Fan SHIM: Setting LED to RGB: {r}, {g}, {b}".format(r=r, g=g, b=b))
+
+
+print("""manual.py - Fan SHIM manual control
+
+Example commands:
+
+    echo "on" > /tmp/fanshim     - Turn fan on
+    echo "off" > /tmp/fanshim    - Turn fan off
+    echo "FF0000" > /tmp/fanshim - Make LED red
+    echo "00FF00" > /tmp/fanshim - Make LED green
+
+""")
+
+while True:
+    with open(FIFO_NAME, "r") as fifo:
+        while True:
+            data = fifo.read().strip()
+            if len(data) == 0:
+                break
+            handle_command(data)