EspNowAudio - Revision history

Bertrik Sikken at 13:37, 17 March 2020

2020-03-17T13:37:28Z

← Older revision		Revision as of 13:37, 17 March 2020
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	* build an Arduino playground project so I can access the API from the command line and play with it		* build an Arduino playground project so I can access the API from the command line and play with it
	* start with an ESP32 + INMP441		* start with an ESP32 + INMP441

			Next steps:
			* build a framework to stream the data and determine stream rate:
			** queue is filled with random data
			** queue is emptied by an espnow send process running in the main loop()
			** espnow completion callback notifies when next packet can be sent
			* investigate I2S communication from a microphone on an ESP8266
			* convert espnow data to UDP/VBAN on the receiving end
			* convert UDP/VBAN to audio on laptop

	Related interesting stuff:		Related interesting stuff:

Bertrik Sikken: /* What */

2020-03-16T12:11:00Z

What

← Older revision		Revision as of 12:11, 16 March 2020
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	Stuff to learn:		Stuff to learn:
	* ESP now broadcast mode: does it really work? ~~https://github~~.~~com/espressif/ESP8266_NONOS_SDK/issues/8#issuecomment-419774432~~		* ESP now broadcast mode: does it really work? YES, it does work, there's no ACK (so it's even a bit faster).
	* ESP now throughput: https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now		* ESP now throughput: https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now
	* ESP now packet loss when used continuously		* ESP now packet loss when used continuously

Bertrik Sikken: /* Result */

2020-03-16T11:09:12Z

Result

← Older revision		Revision as of 11:09, 16 March 2020
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	== Result ==		== Result ==
	ESP NOW broadcast just seems to work fine (not sure what prevented me from making it work earlier).		ESP NOW broadcast just seems to work fine (not sure what prevented me from making it work earlier).
	I've ~~set~~ the WiFi channel to 1.		I've fixed the WiFi channel to 1.

	On the receiving side, I use an ESP32.		On the receiving side, I use an ESP32.
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	* send a message		* send a message
	* that's it!		* that's it!

			Transmission appears to be very fast, taking less than a millisecond for 10 messages in a row.
			However, with broadcast, the sending side does not receive (or wait for) any acknowledgements, the tx callback just reports the broadcast address, the rx callback reports nothing.

	== References ==		== References ==
	* https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf		* https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf

Bertrik Sikken at 21:47, 15 March 2020

2020-03-15T21:47:21Z

← Older revision		Revision as of 21:47, 15 March 2020
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	* ESP audio playback https://github.com/earlephilhower/ESP8266Audio		* ESP audio playback https://github.com/earlephilhower/ESP8266Audio
	* VBAN specification https://www.vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf		* VBAN specification https://www.vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf

			== Result ==
			ESP NOW broadcast just seems to work fine (not sure what prevented me from making it work earlier).
			I've set the WiFi channel to 1.

			On the receiving side, I use an ESP32.
			On the sending side, I use an ESP8266:
			* init the esp now library
			* add the broadcast address as a peer
			* send a message
			* that's it!

			== References ==
			* https://www.espressif.com/sites/default/files/documentation/esp-now_user_guide_en.pdf

Bertrik Sikken: /* What */

2020-03-01T12:43:41Z

What

← Older revision		Revision as of 12:43, 1 March 2020
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	Stuff to learn:		Stuff to learn:
	* ESP now broadcast mode: does it really work? https://github.com/espressif/ESP8266_NONOS_SDK/issues/8#issuecomment-419774432		* ESP now broadcast mode: does it really work? https://github.com/espressif/ESP8266_NONOS_SDK/issues/8#issuecomment-419774432
	* ESP now throughput		* ESP now throughput: https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now
	* ESP now packet loss when used continuously		* ESP now packet loss when used continuously
	* Audio over IP protocols, e.g. VBAN		* Audio over IP protocols, e.g. VBAN
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	It immediately starts transmitting audio from a digital I2S microphone over ESP now.		It immediately starts transmitting audio from a digital I2S microphone over ESP now.
	The receiving end will probably be an ESP32, that receives the ESP now audio and converts into a standardized audio-over-ip protocol, e.g. VBAN.		The receiving end will probably be an ESP32, that receives the ESP now audio and converts into a standardized audio-over-ip protocol, e.g. VBAN.

			Plans:
			* build an Arduino playground project so I can access the API from the command line and play with it
			* start with an ESP32 + INMP441

	Related interesting stuff:		Related interesting stuff:
	* https://www.hackster.io/julianfschroeter/esp32-voice-streamer-52bd7e		* https://www.hackster.io/julianfschroeter/esp32-voice-streamer-52bd7e
	* ESP now throughput https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now
	* ESP audio playback https://github.com/earlephilhower/ESP8266Audio		* ESP audio playback https://github.com/earlephilhower/ESP8266Audio
	* VBAN specification https://www.vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf		* VBAN specification https://www.vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf

Bertrik Sikken at 12:29, 1 March 2020

2020-03-01T12:29:50Z

← Older revision		Revision as of 12:29, 1 March 2020
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	* ESP now throughput https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now		* ESP now throughput https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now
	* ESP audio playback https://github.com/earlephilhower/ESP8266Audio		* ESP audio playback https://github.com/earlephilhower/ESP8266Audio
			* VBAN specification https://www.vb-audio.com/Voicemeeter/VBANProtocol_Specifications.pdf

Bertrik Sikken at 12:25, 1 March 2020

2020-03-01T12:25:49Z

← Older revision		Revision as of 12:25, 1 March 2020
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	Related interesting stuff:		Related interesting stuff:
	* https://www.hackster.io/julianfschroeter/esp32-voice-streamer-52bd7e		* https://www.hackster.io/julianfschroeter/esp32-voice-streamer-52bd7e
			* ESP now throughput https://hackaday.io/project/166868-my-attempt-at-an-esp-now-mesh/log/166398-072419-maximum-transmission-throughput-of-esp-now
			* ESP audio playback https://github.com/earlephilhower/ESP8266Audio

Bertrik Sikken at 12:24, 1 March 2020

2020-03-01T12:24:11Z

← Older revision		Revision as of 12:24, 1 March 2020
Line 21:		Line 21:
	It immediately starts transmitting audio from a digital I2S microphone over ESP now.		It immediately starts transmitting audio from a digital I2S microphone over ESP now.
	The receiving end will probably be an ESP32, that receives the ESP now audio and converts into a standardized audio-over-ip protocol, e.g. VBAN.		The receiving end will probably be an ESP32, that receives the ESP now audio and converts into a standardized audio-over-ip protocol, e.g. VBAN.

			Related interesting stuff:
			* https://www.hackster.io/julianfschroeter/esp32-voice-streamer-52bd7e

Bertrik Sikken at 12:10, 1 March 2020

2020-03-01T12:10:58Z

← Older revision		Revision as of 12:10, 1 March 2020
Line 10:		Line 10:

	Stuff to learn:		Stuff to learn:
	* ESP now broadcast mode: does it really work?		* ESP now broadcast mode: does it really work? https://github.com/espressif/ESP8266_NONOS_SDK/issues/8#issuecomment-419774432
	* ESP now throughput		* ESP now throughput
	* ESP now packet loss when used continuously		* ESP now packet loss when used continuously

Bertrik Sikken at 11:49, 1 March 2020

2020-03-01T11:49:15Z

← Older revision		Revision as of 11:49, 1 March 2020
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	* ESP now packet loss when used continuously		* ESP now packet loss when used continuously
	* Audio over IP protocols, e.g. VBAN		* Audio over IP protocols, e.g. VBAN
			* Possibility to transfer even ultrasonic audio?

	Possible end result:		Possible end result: