RTP pager and receiver for Scream virtual sound card
Posted: Tue Apr 28, 2020 8:11 am
Two simple applications receiving audio over WiFi: http://tomeko.net/projects/esp32_rtp_pager/.
RTP pager accepts unicast/multicast stream encoded with G.722 or G.711a/u and should be compatible with most VoIP phones with "BLF" keys.
Receiver for https://github.com/duncanthrax/scream accepts unicast/multicast L16/44100/stereo stream from virtual sound card running on Windows.
Both applications are using external I2S codec (PCM5102).
Issues: packet loss (less visible with RTP, perhaps because of lower packet rate), varying depending on access point / channel / transmission mode (unicast might be more reliable than multicast). Jitter buffers are configured as quite long, so at least short messages should be received without buffer underruns.
RTP pager accepts unicast/multicast stream encoded with G.722 or G.711a/u and should be compatible with most VoIP phones with "BLF" keys.
Receiver for https://github.com/duncanthrax/scream accepts unicast/multicast L16/44100/stereo stream from virtual sound card running on Windows.
Both applications are using external I2S codec (PCM5102).
Issues: packet loss (less visible with RTP, perhaps because of lower packet rate), varying depending on access point / channel / transmission mode (unicast might be more reliable than multicast). Jitter buffers are configured as quite long, so at least short messages should be received without buffer underruns.