ESP8266 Community Forum

- Sat Oct 04, 2014 8:55 pm #1196 Hey there,

in some threads it was asked how fast the chip would transfer data over wifi.
Just today I found a hint in some sources, that espressif might actually have been generously enough to include "netio" in their lwip library.
This means, that you can run a pretty much standard performance test on the module, without actually having to compile anything yourself.

The modules runs a netio TCP-only server on port 18767, i.e. you can connect to it like this:

Code: Select all./netio -t -p 18767 <module ip>

Here's some data I got, while the module was lying about 20cm from my Laptop and connected in sta+softAP mode (i.e. running it's own network while being connected to an ap).

First set is through the 3rd-party ap connection (i.e. laptop <-> ap <-> esp):

Code: Select allNETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel

TCP connection established.
Packet size  1k bytes:  78.37 KByte/s Tx,  37.08 KByte/s Rx.
Packet size  2k bytes:  91.32 KByte/s Tx,  29.69 KByte/s Rx.
Packet size  4k bytes:  283.06 KByte/s Tx,  81.92 KByte/s Rx.
Packet size  8k bytes:  244.86 KByte/s Tx,  65.87 KByte/s Rx.
Packet size 16k bytes:  263.49 KByte/s Tx,  63.75 KByte/s Rx.
Packet size 32k bytes:  235.51 KByte/s Tx,  72.87 KByte/s Rx.
Done.


2nd set through the softAP connection (i.e. laptop <-> esp):

Code: Select allNETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel

TCP connection established.
Packet size  1k bytes:  146.76 KByte/s Tx,  14622 Byte/s Rx.
Packet size  2k bytes:  91.85 KByte/s Tx,  13155 Byte/s Rx.
Packet size  4k bytes:  82.97 KByte/s Tx,  25.40 KByte/s Rx.
Packet size  8k bytes:  90.21 KByte/s Tx,  22.11 KByte/s Rx.
Packet size 16k bytes:  76.65 KByte/s Tx,  57.09 KByte/s Rx.
Packet size 32k bytes:  247.28 KByte/s Tx,  68.36 KByte/s Rx.
Done.


Note: While I ran the tests multiple times, some values (mostly Tx of the Module) vary between 1 and 25 KBytes/s in between 2 runs.
This means that these are not "guaranteed" values, but instead they should provide you with a rough overview of what the module is capable of (and what it's not.).

Go ahead, run the tests yourself, tell us if your speeds are in the same range, please http://www.ars.de/ars/ars.nsf/docs/netio

EDIT: There's one thing I forgot, sorry for the confusion! You need to call

Code: Select allnetio_init();

at some point in your code in order to have the server listen for connections.

Regards

- Tue Oct 07, 2014 11:22 am #1379 noob question:
is it possible to increase throughput by sending via UDP?

thx!

- Tue Oct 07, 2014 12:31 pm #1382 Can you do a third test - plug the laptop into the router with Ethernet, then run the test. That will get rid of the double wifi transit. The double transit likely causes collisions and retransmits.

As a general check throughput in these benchmarks should scale with packet size up to 7K (802.11 MTU size) and then be fairly flat from then on.

Where I get my modules

- Thu Oct 30, 2014 10:30 pm #2083 that is great