squawk
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| squawk [2016-10-10 15:55] – [Usage] rob | 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 However, that pi has too much stuff hanging off it, and was very out of date.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 However, that pi has too much stuff hanging off it, and was very out of date.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 12: | Line 12: | ||
| < | < | ||
| mosquitto_pub -h mqtt -t ' | 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): | Text-to-speech message (with a subtle notification bong): | ||
| Line 23: | Line 27: | ||
| **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. | **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 180: | 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 395: | Line 403: | ||
| 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). | 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 ==== | ==== Power Supply ==== | ||
squawk.1476114917.txt.gz · Last modified: 2016-10-10 15:55 by rob