GPIO sample scripts (alongside wiki changes)

htdocs/inc.controlPlayer.php

@@ -3,6 +3,7 @@
     print '<div class="playerWrapperCover" id="coverWrapper"></div>';
 }
 ?>
+
 <div id="controlWrapper"></div>
 
 <script>
@@ -13,6 +14,7 @@
     $('#coverWrapper').load('ajax.loadCover.php');";
 }
 ?>
+
 	$('#controlWrapper').load('ajax.loadControls.php');
     var refreshId = setInterval(function() {
 <?php
@@ -21,7 +23,8 @@
         $('#coverWrapper').load('ajax.loadCover.php?' + 1*new Date());";
 }
 ?>
+
 		$('#controlWrapper').load('ajax.loadControls.php?' + 1*new Date());
-    }, 5000);
+    }, 2000);
 });
 </script> 

misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample

@@ -0,0 +1,31 @@
+#!/usr/bin/python3
+from gpiozero import Button
+from signal import pause
+from subprocess import check_call
+
+# This script is compatible with any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# Only Buttons that have dissimilar functions as the two encoder are enabled
+
+# 2018-10-15
+# this script has the `pull_up=True` for all pins. See the following link for additional info: 
+# https://github.com/MiczFlor/RPi-Jukebox-RFID/issues/259#issuecomment-430007446
+#
+# 2017-12-12
+# This script was copied from the following RPi forum post:
+# https://forum-raspberrypi.de/forum/thread/13144-projekt-jukebox4kids-jukebox-fuer-kinder/?postID=312257#post312257
+# I have not yet had the time to test is, so I placed it in the misc folder.
+# If anybody has ideas or tests or experience regarding this solution, please create pull requests or contact me.
+
+def def_shutdown():
+    check_call("./scripts/playout_controls.sh -c=shutdown", shell=True)
+
+def def_halt():
+    check_call("./scripts/playout_controls.sh -c=playerpause", shell=True)
+
+shut = Button(3, hold_time=2)
+halt = Button(24,pull_up=True)
+
+shut.when_held = def_shutdown
+halt.when_pressed = def_halt
+
+pause()

misc/sampleconfigs/gpio-buttons.py.sample

@@ -3,6 +3,9 @@ from gpiozero import Button
 from signal import pause
 from subprocess import check_call
 
+# This script will block any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# due to the assignment of GPIO 19 and 21 to a buttons
+
 # 2018-10-31
 # Added the function on holding volume + - buttons to change the volume in 0.3s interval
 #

misc/sampleconfigs/phoniebox-idle-watchdog-countdown.service.sample

@@ -0,0 +1,12 @@
+[Unit]  
+Description=Phoniebox Idle Watchdog Countdown Service
+
+[Service]
+User=pi
+Group=pi
+Type=simple
+WorkingDirectory=/home/pi/RPi-Jukebox-RFID
+ExecStart=/home/pi/RPi-Jukebox-RFID/scripts/idle-watchdog-countdown.sh
+
+[Install]
+WantedBy=multi-user.target

misc/sampleconfigs/phoniebox-rotary-encoder.service.stretch-default.sample

@@ -5,7 +5,9 @@ After=network.target iptables.service firewalld.service
 [Service]
 Restart=always
 WorkingDirectory=/home/pi/RPi-Jukebox-RFID
-ExecStart=/home/pi/RPi-Jukebox-RFID/scripts/rotary-encoder.py
+ExecStart=/usr/bin/python2 /home/pi/RPi-Jukebox-RFID/scripts/rotary-encoder.py
+User=pi
+Group=pi
 
 [Install]
 WantedBy=multi-user.target

scripts/idle-watchdog-countdown.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+# This is a mpd idle watchdog to shutdown the box.
+# 
+# Phonieboxes without reliable system time can use this idle-watchdog-script to
+# shutdown the box after a pre defined number of minutes.
+# This script checks every 60 seconds if mpd is paying music with volume set to
+# greater than 0. If not it decreases the pre-defined number of minutes and shut
+# down the box if it reaches zero.
+# Be aware that playing lots of short sequences (less than 60 seconds) could be 
+# undetected by this script and lead to an unwanted shutdown.
+
+# Check for idle time settings. Assume to disable automatic shudown if not set.
+if [ ! -r ./settings/Idle_Time_Before_Shutdown ]; then
+    logger "Idle_Time_Before_Shutdown is not set. Disable idle watchdog!"
+    exit 0
+else
+    SHUTDOWNAFTER=$(cat ./settings/Idle_Time_Before_Shutdown | head -n 1)
+fi
+
+# Check if setting is a numeric value; else warn and disable watchdog.
+[ "$SHUTDOWNAFTER" -eq "$SHUTDOWNAFTER" ] 2>/dev/null
+if [ $? -ne 0 ]; then
+    logger "Invalid settings for Idle_Time_Before_Shutdown (not numeric). Disable idle watchdog!"
+    exit 0
+fi
+
+COUNTDOWN=$SHUTDOWNAFTER # initialize countdown value
+
+# start the continuous loop
+while [ $SHUTDOWNAFTER -gt 0 ]; do
+    # check if mpd is playing and volume is not 0
+    if [ $(mpc | egrep -c '^\[playing\]') -eq 1 ] && [ $(mpc | egrep -c '^volume:\s+0%') -eq 0 ]; then
+        if [ $COUNTDOWN -ne $SHUTDOWNAFTER ]; then
+            logger "mpd is playing audible again. Stop countdown to shutdown."
+        fi
+        COUNTDOWN=$SHUTDOWNAFTER # re-init countdown
+    else
+        if [ $COUNTDOWN -gt 0 ]; then
+            logger "mpd is NOT playing audible. Shutdown in $COUNTDOWN minutes."
+        else
+            logger "mpd was NOT playing audible for $SHUTDOWNAFTER minutes. Shutdown system!"
+            ./scripts/playout_controls.sh -c=shutdownsilent
+	    exit 0
+        fi
+        COUNTDOWN=$(expr $COUNTDOWN - 1)
+    fi
+    sleep 60
+done
+
+exit 0

scripts/ky040.py

@@ -10,49 +10,28 @@
 
 class KY040:
 
-    def __init__(self, arg_clockPin, arg_dataPin, arg_switchPin=None, arg_rotaryCallbackCW=None, arg_rotaryCallbackCCW=None, arg_switchCallback=None, arg_rotaryBouncetime=100, arg_switchBouncetime=200):
+    def __init__(self, arg_clockPin, arg_dataPin, arg_rotaryCallbackCW=None, arg_rotaryCallbackCCW=None, arg_rotaryBouncetime=100, arg_switchBouncetime=100):
         # persist values
         self.clockPin = arg_clockPin
         self.dataPin = arg_dataPin
-        self.switchPin = arg_switchPin
         self.rotaryCallbackCW = arg_rotaryCallbackCW
         self.rotaryCallbackCCW = arg_rotaryCallbackCCW
-        self.switchCallback = arg_switchCallback
         self.rotaryBouncetime = arg_rotaryBouncetime
-        self.switchBouncetime = arg_switchBouncetime
 
         # setup pins
-        # data and clock have pullups at the PCB
-        GPIO.setup(self.clockPin, GPIO.IN)
-        GPIO.setup(self.dataPin, GPIO.IN)
-
-        if None != self.switchPin:
-            GPIO.setup(self.switchPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+        GPIO.setup(self.clockPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+        GPIO.setup(self.dataPin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 
     def start(self):
         GPIO.add_event_detect(self.clockPin, GPIO.FALLING, callback=self._clockCallback, bouncetime=self.rotaryBouncetime)
 
-        if None != self.switchPin:
-            GPIO.add_event_detect(self.switchPin, GPIO.FALLING, callback=self._switchCallback, bouncetime=self.switchBouncetime)
-
     def stop(self):
         GPIO.remove_event_detect(self.clockPin)
 
-        if None != self.switchPin:
-            GPIO.remove_event_detect(self.switchPin)
-
     def _clockCallback(self, pin):
         if GPIO.input(self.clockPin) == 0:
             data = GPIO.input(self.dataPin)
             if data == 1:
                 self.rotaryCallbackCCW()
             else:
                 self.rotaryCallbackCW()
-
-    def _switchCallback(self, pin):
-        if None == self.switchPin:
-            return
-
-        if GPIO.input(self.switchPin) == 0:
-            self.switchCallback()
-

scripts/rotary-encoder.py

@@ -1,24 +1,29 @@
 #!/usr/bin/python3
-# rotary volume knob
+# rotary volume and track knob
+# This script is compatible with any I2S DAC e.g. from Hifiberry, Justboom, ES9023, PCM5102A
+# Please combine with corresponding gpio button script, which handels the button functionality of the encoder
+# RPi-Jukebox-RFID/misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample
+
 # these files belong all together:
 # RPi-Jukebox-RFID/scripts/rotary-encoder.py
 # RPi-Jukebox-RFID/scripts/ky040.py
 # RPi-Jukebox-RFID/misc/sampleconfigs/phoniebox-rotary-encoder.service.stretch-default.sample
+# RPi-Jukebox-RFID/misc/sampleconfigs/gpio-buttons.py.rotaryencoder.sample
 # See wiki for more info: https://github.com/MiczFlor/RPi-Jukebox-RFID/wiki
 
 #
-# circuit diagram
+# circuit diagram for one of two possible encoders (volume), use GPIOs from code below for the tracks
 # (capacitors are optionally)
 #
 #       .---------------.                      .---------------.
 #       |               |                      |               |
-#       |           CLK |------o---------------| GPIO 5        |
+#       |           CLK |------o---------------| GPIO 5       |
 #       |               |      |               |               |
-#       |           DT  |------)----o----------| GPIO 6        |
+#       |           DT  |------)----o----------| GPIO 6       |
 #       |               |      |    |          |               |
-#       |           SW  |------)----)----------| GPIO 13       |
+#       |           SW  |------)----)----------| GPIO 3        |
 #       |               |      |    |          |               |
-#       |           +   |------)----)----------| 5V            |
+#       |           +   |------)----)----------| 3.3V          |
 #       |               |      |    |          |               |
 #       |           GND |------)----)----------| GND           |
 #       |               |      |    |          |               |
@@ -40,33 +45,42 @@
 from subprocess import check_call
 
 
-def rotaryChangeCW():
+def rotaryChangeCWVol():
    check_call("./scripts/playout_controls.sh -c=volumeup", shell=True)
 
-def rotaryChangeCCW():
+def rotaryChangeCCWVol():
    check_call("./scripts/playout_controls.sh -c=volumedown", shell=True)
 
-def switchPressed(dummy):
-   check_call("./scripts/playout_controls.sh -c=mute", shell=True)
+def rotaryChangeCWTrack():
+   check_call("./scripts/playout_controls.sh -c=playernext", shell=True)
+
+def rotaryChangeCCWTrack():
+   check_call("./scripts/playout_controls.sh -c=playerprev", shell=True)
 
 
 if __name__ == "__main__":
 
-   CLOCKPIN = 5
-   DATAPIN = 6
-   SWITCHPIN = 13
+   CLOCKPINVol = 5 
+   DATAPINVol = 6
+
+   CLOCKPINTrack = 22
+   DATAPINTrack = 23
 
    GPIO.setmode(GPIO.BCM)
 
-   ky040 = KY040(CLOCKPIN, DATAPIN, SWITCHPIN, rotaryChangeCW, rotaryChangeCCW, switchPressed)
+   ky040Vol = KY040(CLOCKPINVol, DATAPINVol, rotaryChangeCWVol, rotaryChangeCCWVol)
+
+   ky040Track = KY040(CLOCKPINTrack, DATAPINTrack, rotaryChangeCWTrack, rotaryChangeCCWTrack)
 
-   ky040.start()
+   ky040Vol.start()
+   ky040Track.start()
 
    try:
       while True:
          time.sleep(0.2)
    finally:
-      ky040.stop()
+      ky040Vol.stop()
+      ky040Track.stop()
       GPIO.cleanup()