WizNet5100 and webserver

krolikbest · Joined: 02 Jan 2017 Posts: 112

Hi,

currently i'm developing a project its aim is to collect some datas from PLCs (Modbus RTU) and want to display this results on some webpage. Hardware is Arduino Uno and hat - wiznet5100. Modbus and communicatioin with plcs is done, last step (I hope) is to display results onto some main webpage. So I found in examples of Bascom some webserver-spi.bas file. After changed definition of uC - Arduino Uno and tcpip config:

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

In the blog section is a webserver that I made that served pages from an sd card
and also showed data from ports its configuration was done on web page
I also show how to put data into pre prepared web pages both in flash and from sd card.
The functions are contained in separate modules.
But the big thing with web servers is the amount of data you need to
handle that comes from web browser requests means you need lots of ram
so chips with 4k only just work 8k chips are better but the best chip is the mega1284p with 16k of ram
Regards Paul

krolikbest · Joined: 02 Jan 2017 Posts: 112

Ok, thanks. Time to study.

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

EDC · Joined: 26 Mar 2014 Posts: 971

Hello @królikbest Very Happy

(for those from other countries it means best rabbit Very Happy

)

My first webserver was builded on MCS Sample and Paulvk very helpful code..
After some time, when device must communicate over USB (RX0), BT(RX3), Ethernet(SPI) and even ESP8266(RX2) I found that this is a fine way to write one function for parsing incomming data. So if youll be studdy Paulvk code take in mind that this can be done slighly better when it is from the begining writed like "universal for any interface".

In my code message received from every interface is passed into function "parse_it". Sommetimes I pass into the function from what interface I got data/question so uC will answear into correct interface.

I dont know if I describe it correctly - one function can handle questions/requests from many interfaces so you can write for device APP for PC or Smartphone and contorol it over any interface.

Example of sharing data from USB and ETH is here -> https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=14608
maybe not optimized but every data passed into the function can make some response Very Happy

After all ... presence some data in the elegant way in the AVR need to 1hour studdy HTML syntax. Gauges needs more time.

krolikbest · Joined: 02 Jan 2017 Posts: 112

Hi

luckily I've run this example from Bascom and now i'm rewriting it to the more simplified version (well at least for me) cos I don't need authorization directly in the code because the whole installation is behind a router with authorization. Still looking through Paulvk code
Next small step to make my project ready will be to read and write from/to sd card....

PS.
I like carrot juice, that's why BestRabbit Smile

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

krolikbest · Joined: 02 Jan 2017 Posts: 112

I've downloaded the file "ENC28J60 IO Webserver AMTEGA644.bas" and there i'll be looking for routines according to read/write sd card, this is the right file?

Duval JP · Joined: 22 Jun 2004 Posts: 1161 Location: France

Hi
to read SD file, I use AVRdos , you have to pay a little bit for it. see the main site https://www.mcselec.com/index.php?option=com_content&task=view&id=20&Itemid=41
And I did an adaptation for M644 1284
as Avrdos need space I subjest to use 1284

you ave to enable iterrupts

For me it's works very well

attached the 3 files .inc
Wink

JP

krolikbest · Joined: 02 Jan 2017 Posts: 112

Meanwhile I've foung https://www.mcselec.com/index.php?option=com_content&task=view&id=291&Itemid=57 so need time to compare and figure out how to use it.
Thanks for help.

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

There is a W5100 project that is done with .INC files
https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=12358
Regards Paul

krolikbest · Joined: 02 Jan 2017 Posts: 112

Thanks!

krolikbest · Joined: 02 Jan 2017 Posts: 112

Hi, in the attachment my very simple code:

The problem is that in Chrome browser I've noticed that every refresh of page is probably made twice, so the value of hitcounter is also twice whereas in IE or Mozilla it seems to be ok, I mean that after refreshing a page the value of hitcounter is incremented only by one instead of two like in Chrome. I suppouse that it could be something wrong in my code, especially that Bascom example wroks correctly in all browser types. Or maybe someone has already encountered such problem earlier in Chrome?