ESP8266 Community Forum

- Mon Oct 06, 2014 3:25 pm #1332

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.

Chris, how would that affect the ability of the '89 do stream high-bandwidth data?

thx!

- Mon Oct 06, 2014 3:30 pm #1333

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

Really appreciate that! The RT5350 is one i have been considering. Definitely want to find an existing module, not the raw chip (will make my own modules later).

Also considering:

RTL8188ETV http://www.realtek.com.tw/products/prod ... ProdID=228
http://www.aliexpress.com/item/RS232-RS ... 04540.html

HLK-RM10 http://www.hlktech.net/product_detail.php?ProId=43
http://www.aliexpress.com/item/serial-u ... 03871.html

HLK-RM04 http://www.hlktech.net/product_detail.php?ProId=49
http://www.aliexpress.com/item/Free-shi ... 12880.html

MT7681 http://hackaday.com/2014/09/07/more-wif ... t-madness/
http://www.aliexpress.com/item/-/2019114197.html

Any thoughts on them?

PS, I'm not seeing the same price for that taobao RT5350 on aliexpress. Aren't they sister companies?

- Mon Oct 06, 2014 3:48 pm #1336

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.

Chris, how would that affect the ability of the '89 do stream high-bandwidth data?

thx!

Because a WiFi stick has little handling of IP packages, i would guess. I would think it is more of an "raw" device. The '66 however does the whole network stack itself. TCP/IP, DNS, etc. Since the stack runs on the small chip in this case, the effective throughput would naturally be lower than what you could get by just getting/sending raw data around with no protocol stack inbetween.

Plus, there may be a more aggressive power-saving scheme in the '66, since it is obviously aimed at IoT stuff and not data throughput.

Greetings,

Chris

- Mon Oct 06, 2014 3:53 pm #1338 you mean the '89 can act as a transmitter without involving TCP/IP?