MicroPi
A set of nodes for recording and streaming audio from an usb microphone connected to a Raspberry Pi in Node-Red.
Demo Flow:
https://flows.nodered.org/flow/2267b12494608d62037e2f8043b955ae
Nodes:
MicroPi
To record send boolean true as msg.payload, to stop send false.
3 Outputs:
- Streaming audio as raw L16
- Wav file as a buffer with metadata
- Status messages
Microphone
Streams Audio as raw L16 from the microphone. To record send boolean true as msg.payload, to stop send false.
Wav-Filewriter
Pipes the audio stream into a wav file on the sdcard
Important Notice!!
MicroPi Requires to have NodeJS version > 6.5.x and Node-Red version > 0.14.x installed, note that those available via apt-get WILL NOT WORK.
For information on how to get the newest versions the easiest way just check http://thisdavej.com/beginners-guide-to-installing-node-js
Tested and working on: npm 3.10.3, node v6.5.0, node-red v0.14.6