ESP8266 Community Forum

- Mon Oct 06, 2014 8:33 am #1306

so their marketing verbiage "high fidelity audio applications" is false?

what is the max wireless throughput on this chip?

it supports 802.11n, wouldn't that mean 802.11n speeds?

thx!

It doesn't say "easy" high fidelity audio applications. If you want to spend six months on the code you can probably get it to work.

Where I get my modules

- Mon Oct 06, 2014 1:51 pm #1324 my question atm is not so much about "easy", but "possible".

you're saying it's possible. What makes you say that? the chip can transmit high-bitrate wirelessly?

does anyone know what is the max wireless throughput on this chip?

it supports 802.11n, does that mean 802.11n speeds, or simply that it can connect to a .11n server?

thx

- Mon Oct 06, 2014 2:43 pm #1329 The ESP8089 is almost identical to a ESP8266. ESP8089 is used in tablets. Maybe you can locate one and test throughput. It will be easier to get a general idea of throughput in a full system.

http://www.aliexpress.com/item/7-Inchs- ... 81444.html
http://linux-sunxi.org/Ippo_q8h
http://forum.gsmhosting.com/vbb/f906/al ... e-1833840/

There is also this post:
viewtopic.php?f=5&t=245&p=1196&hilit=performance#p1196
Those numbers are too slow to do PCM streaming. But it is likely that the code being tested is not optimized very well. The tablet code should be better optimized and give a truer picture.

This chip can send and receive 802.11n packets. But there is no rule in 802.11n that says how closely together those packets have to be spaced. So if there is too much space between packets the hardware will be doing 802.11n, but the throughput could be 40Kb/s. It takes fairly beefy hardware to maintain an 802.11n stream at minimal packet spacing. I suspect RT5350 can't maintain one and you'd need a MT7620.

You are also going to have to deal with having zero documentation on the I2S support.

Far, far easier to use a MT7620 or RT5350 for this. BOM for RT5350 setup is under $5. Maybe $6.50 for the MT7620.
Here is finished module for Y44.00, $7.33
http://item.taobao.com/item.htm?spm=201 ... a54003142f

Where I get my modules

- Mon Oct 06, 2014 3:20 pm #1330

Those numbers are too slow to do PCM streaming. But it is likely that the code being tested is not optimized very well. The tablet code should be better optimized and give a truer picture.

I would also guess that the '89 has a much smaller firmware basically just for setup and spitting out/accepting data, while the '66 has a rather large chunk of code handling all the IP protocol stuff and more.

Greetings,

Chris