Differences

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--- squawk [2016-10-05 13:32] – [/home/pi/pico.sh] tim
+++ squawk [2023-11-25 23:45] (current) – Added playlist command jaso55555
@@ Line 1: / Line 1: @@
-====== Audio Alerts ======
+====== Audio Alerts (squawk) ======
-Traditionally this was handled by doorpi. However, that pi has too much stuff hanging off it, and was very out of date. There was an issue of a loud pop occurring before any sound played, this was fixed in later firmware updates. Rob has now dedicated a pi (original B) for the purpose and documents it thus:
+Traditionally this was handled by doorpi. However, that pi has too much stuff hanging off it, and was very out of date. There was an issue of a loud pop occurring before any sound played, this was fixed in later firmware updates. Rob has purchased a pi (original B), amplifier and speakers for the purpose and documents them thus:
 ===== Usage =====
 Sounds and TTS messages are triggered via the [[mqtt#sound|message bus]].
+Examples for testing might be something like:
+Play a sound file:
+<code>
+mosquitto_pub -h mqtt -t 'sound/g1/play' -m canttouchthis.mp3
+</code>
+Play a list of sound files with no gap:
+<code>
+mosquitto_pub -h mqtt -t 'sound/g1/playlist' -m "long_long_man/long.mp3,long_long_man/loooong.mp3,long_long_man/maaaan.mp3"
+</code>
+Text-to-speech message (with a subtle notification bong):
+<code>
+mosquitto_pub -h mqtt -t 'sound/g1/speak' -m "All your base are belong to us"
+</code>
+Text-to-speech message (with a clear airport/transit chiming sound):
+<code>
+mosquitto_pub -h mqtt -t 'sound/g1/announce' -m "Good evening, my sensors indicate that the laser cutter may be on fire."
+</code>
+**Theory:** You could direct sound two only two rooms at once by playing the left or right channel only. By default mpg123 is called with the -m option to ensure that the output is mono and thus the same sound comes out every speaker.
+===== Adding new sounds =====
+Use the web file browser at http://squawk.hacklab:8080/.
 ===== Raspbian =====
@@ Line 13: / Line 38: @@
 ==== raspi-config ====
+  * Expand filesystem
   * Medium overclock
   * Graphics mem reduced to 16M
@@ Line 38: / Line 64: @@
 <code>
-su -c "mpg123 /home/pi/sounds/indyboot.mp3" pi &
+su -c "/home/pi/startup.sh" pi &
-su -c "/home/pi/respawn --syslog /home/pi/squawk.py" pi &
+su -c "/home/pi/respawn --syslog --max-backoff=10 /home/pi/squawk.py" pi &
 </code>
 ===== Scripts =====
@@ Line 57: / Line 82: @@
 import signal
 import time
+import random
+logging.basicConfig(level=logging.INFO)
-last_state = None
 max_playtime  = 15
+sounds_path = "/home/pi/sounds"
-sounds_path = "/home/pi/sounds"
+status = 'closed'
 # runs a command and terminates it after a specified timeout
@@ Line 114: / Line 140: @@
                 candidates.append(f)
         if len(candidates) == 0:
-            raise Exception('No files matching %s' % (filename))
+            logging.error('No files matching %s' % (filename))
+            return
         filename = random.choice(candidates)
     else:
         # single file requested
         if filename not in allfiles:
-            raise Exception('File %s not found' % (filename))
+            logging.error('File %s not found' % (filename))
+            return
     base, ext = os.path.splitext(filename)
     if ext == '.mp3':
-        command = ['mpg123', ' -q', filename]
+        command = ['mpg123', '-q', '-m', filename]
         call_with_timeout(command, timeout=timeout)
     else:
-        command = ['play', ' -q', filename]
+        command = ['play', '-q', filename]
         call_with_timeout(command, timeout=timeout)
@@ Line 132: / Line 159: @@
     client.subscribe("sound/g1/play")
     client.subscribe("sound/g1/speak")
+    client.subscribe("sound/g1/announce")
+    client.subscribe("display/doorbot/intercom")
+    client.subscribe("labstatus")
 def on_message(client, userdata, msg):
+    global status
+    if msg.topic == 'labstatus':
+        if msg.payload == 'open':
+           status = 'open'
+        else:
+           status = 'closed'
     # ignore retained (non-realtime) messages
@@ Line 140: / Line 178: @@
     if msg.topic == 'sound/g1/play':
-	play(msg.payload)
+        play(msg.payload)
     if msg.topic == 'sound/g1/speak':
-	play('dong.mp3')
+        play('dongq.mp3')
         speak(msg.payload)
+    if msg.topic == 'sound/g1/announce':
+        play('chime.mp3')
+        speak(msg.payload)
+    if msg.topic == 'access/entrance/request':
+        if status == 'closed':
+            play('doorbell.mp3')
 m = mqtt.Client()
@@ Line 303: / Line 348: @@
 play -q /tmp/pico.wav
 rm -f /tmp/pico.wav
+</code>
+==== /home/pi/startup.sh ====
+<code bash>
+#!/bin/bash
+sleep 3
+_IP4=$(hostname -I | cut -d ' ' -f 1) || true
+mpg123 -m -q /home/pi/sounds/indyboot.mp3
+/home/pi/pico.sh "System boot complete. IP address is $_IP4"
 </code>
 ===== Audio files =====
-These live in /home/pi/sounds and can be wav or mp3. SCP new ones into here.
+These live in /home/pi/sounds and can be wav or mp3. Generally prefer mp3. SCP new ones into here.
 <code>
@@ Line 343: / Line 399: @@
 ===== Hardware =====
+{{ :photo_2016-10-10_16-35-17.jpg?direct&200|}}
+The "squawk" unit lives above the IRC terminal, to the right of the main door in G1. It consists of a Raspberry Pi B and a TPA3116 based amplifier board.
+There are four speakers connected, two per channel, located in each of the rooms on the ceiling. The speakers are 8 Ohm moisture resistant cheap ceiling speakers that have exceeded expectations and produce a surprisingly full sound. This opens up the potential for using them for background music in the future (e.g. via MPD).
+==== Raspberry Pi ====
+Standard pi other than having some wires soldered on the underside of the board to connect to the 3.5mm audio jack. Powered via the header rather than USB.
+==== Amplifier ====
+  * TPA3116
+  * "100 W"
+  * 12-24v (more volts = more power)
+  * Volume pot
+  * 3-pin header input or 3.5mm socket
+Audio is input via the 3-pin header.
+Power is input on the centre screw terminal, with left and right speaker outputs either side.
+==== Power Supply ====
+The system runs off a 19.5v laptop PSU located in the ceiling space. This is directly connected into the amplifier board, which is rated up to 24v. A spur from this connects to a DC-DC buck converter, supplying the Raspberry Pi with 5v. The original mini converter used was overheating and melting the heatshrink. It's now been replaced with a larger type which so far is running relatively cool.
+Care should be taken when re-wiring as connecting the laptop PSU accidentally reverse polarity, to the speaker terminals, or to the speakers themselves will likely result in one or more of those being instantly destroyed.
+{{ :speakers.png?nolink|}}
+==== Speakers ====
+  * 8 Ohm
+  * 80 W
+  * Spade terminals
+  * Dual cone
+Two wired in parallel to each channel, as per the following diagram. This roughly equates to 4 Ohm per channel, which is within the 4-8 Ohm spec of the amplifier.
-Pi lives above door. Connected to shit amp board. Amp board and speaker being replaced very soon - will document this then.
+{{:photo_2016-10-10_16-39-03.jpg?direct&200 |}} {{:photo_2016-10-10_16-39-09.jpg?direct&200 |}} {{:photo_2016-10-10_16-39-10.jpg?direct&200 |}} {{:photo_2016-10-10_16-39-12.jpg?direct&200 |}}