squawk
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| squawk [2016-10-09 22:28] – tim | squawk [2023-11-25 23:45] (current) – Added playlist command jaso55555 | ||
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| - | ====== Audio Alerts ====== | + | ====== Audio Alerts |
| - | 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 However, that pi has too much stuff hanging off it, and was very out of date.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 | + | 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 However, that pi has too much stuff hanging off it, and was very out of date.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 |
| ===== Usage ===== | ===== Usage ===== | ||
| Line 9: | Line 9: | ||
| Examples for testing might be something like: | Examples for testing might be something like: | ||
| + | Play a sound file: | ||
| + | < | ||
| + | mosquitto_pub -h mqtt -t ' | ||
| + | </ | ||
| + | Play a list of sound files with no gap: | ||
| + | < | ||
| + | mosquitto_pub -h mqtt -t ' | ||
| + | </ | ||
| + | Text-to-speech message (with a subtle notification bong): | ||
| < | < | ||
| - | mosquitto_pub -h mqtt -t ' | ||
| mosquitto_pub -h mqtt -t ' | mosquitto_pub -h mqtt -t ' | ||
| </ | </ | ||
| + | Text-to-speech message (with a clear airport/ | ||
| + | < | ||
| + | mosquitto_pub -h mqtt -t ' | ||
| + | </ | ||
| + | |||
| + | **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:// | ||
| ===== Raspbian ===== | ===== Raspbian ===== | ||
| Line 46: | Line 64: | ||
| < | < | ||
| - | su -c "mpg123 | + | su -c "/ |
| su -c "/ | su -c "/ | ||
| </ | </ | ||
| Line 122: | Line 140: | ||
| candidates.append(f) | candidates.append(f) | ||
| if len(candidates) == 0: | if len(candidates) == 0: | ||
| - | | + | |
| + | return | ||
| filename = random.choice(candidates) | filename = random.choice(candidates) | ||
| else: | else: | ||
| # single file requested | # single file requested | ||
| if filename not in allfiles: | if filename not in allfiles: | ||
| - | | + | |
| + | | ||
| base, ext = os.path.splitext(filename) | base, ext = os.path.splitext(filename) | ||
| if ext == ' | if ext == ' | ||
| - | command = [' | + | command = [' |
| call_with_timeout(command, | call_with_timeout(command, | ||
| else: | else: | ||
| Line 140: | Line 159: | ||
| client.subscribe(" | client.subscribe(" | ||
| client.subscribe(" | client.subscribe(" | ||
| + | client.subscribe(" | ||
| + | client.subscribe(" | ||
| + | client.subscribe(" | ||
| def on_message(client, | def on_message(client, | ||
| Line 166: | Line 188: | ||
| speak(msg.payload) | speak(msg.payload) | ||
| - | if msg.topic == 'display/doorbot/intercom': | + | if msg.topic == 'access/entrance/request': |
| - | if msg.payload == ' | + | if status == ' |
| play(' | play(' | ||
| Line 326: | Line 348: | ||
| play -q / | play -q / | ||
| rm -f / | rm -f / | ||
| + | </ | ||
| + | |||
| + | ==== / | ||
| + | |||
| + | <code bash> | ||
| + | #!/bin/bash | ||
| + | sleep 3 | ||
| + | _IP4=$(hostname -I | cut -d ' ' -f 1) || true | ||
| + | |||
| + | mpg123 -m -q / | ||
| + | / | ||
| </ | </ | ||
| ===== Audio files ===== | ===== Audio files ===== | ||
| - | These live in / | + | These live in / |
| < | < | ||
| Line 366: | Line 399: | ||
| ===== Hardware ===== | ===== Hardware ===== | ||
| + | {{ : | ||
| + | The " | ||
| + | |||
| + | 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 ==== | ||
| + | |||
| + | * 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. | + | {{: |
squawk.1476052089.txt.gz · Last modified: 2016-10-09 22:28 by tim