ledmatrix_control: Add sleep/wake buttons back

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

ledmatrix/README.md

@@ -212,4 +212,5 @@ Same for the `SLEEP#` pin.
 
 The sleep/wake command always changes the state. But it can't be received when USB is suspended.
 
-The idle timer will send the device to sleep after a configured timeout.
+The idle timer will send the device to sleep after a configured timeout (default 60 seconds).
+The idle timer is reset once the device wakes up or once it receives a command.

ledmatrix_control.py

@@ -1108,9 +1108,8 @@ def gui(devices):
             sg.Button("Stop", k='-STOP-EQ-')
         ],
 
-        # Recent hardware sleeps based on sleep pin, not command
-        #[sg.Text("Sleep")],
-        #[sg.Button("Sleep"), sg.Button("Wake")],
+        [sg.Text("Sleep")],
+        [sg.Button("Sleep"), sg.Button("Wake")],
         # [sg.Button("Panic")]
     ]
     window = sg.Window("LED Matrix Control", layout)