Re: CHEAP wifi modules, at last!
getting the module to work smoothly is a bit of a challenge with the device talking duplex . have noticed that the response part that is required to verify action seems to always be preceded by two cr's (ascii 13) as circled in the attachments .
the latest firmware revision makes things a bit better by slowing to 9600 baud and giving the pic a bit more time to work
its all good fun
thanks to henrik for a good starting point
Re: CHEAP wifi modules, at last!
Also, If you are trying to use Putty (terminal program) from your PC and some sort of usb.ftdi serial converter (caution!! 3v3 only) to communicate serially you have to enter CTRL+J to get the thing to take your command.
If you switch to something like "Termie.exe" it works without the CTRL+J.
Apparently putty has a problem properly sending either the carrage return or the line feed.
Also when using the CWJAP command you have to include the quote marks " when you enter your AP credentials.
I bought one of these off of amazon and it came configured to 9600 baud out of the box.
NOTE: another way to deal with the 3v3 requirment is to just power your PIC and the ESP module from a single lithium ion battery. No 3v3 to 5v0 converter needed
Question... how sensitive to over voltage is the 3v3 type devices? If I take my single lithium ion battery off the charger it usually has around 3.8 to 4.0v is that going to be destructive??
Last edited by Heckler; - 9th December 2014 at 03:33.
Dwight
These PIC's are like intricate puzzles just waiting for one to discover their secrets and MASTER their capabilities.
Re: CHEAP wifi modules, at last!
henrik...
Thanks so much!! for your example.
I was able to connect to my ESP module via an FTDI/USB adapter and send the commands you listed in your example from a terminal program (termie.exe) and achieve the same results (after connecting to my device from a browser.
Now to sharpen up your code and program it into my favorite PIC
It's good simple examples like yours that can clear up a lot of confusion.
good stuff!!
Dwight
These PIC's are like intricate puzzles just waiting for one to discover their secrets and MASTER their capabilities.
Re: CHEAP wifi modules, at last!
I guess now I have to learn html ,I think I need a <form or something \form> to get a value from the browser back to the pic .
any quick tips on how that works ,any simple example would be nice
Re: CHEAP wifi modules, at last!
modified henriks html to this
it displays a input box and a button but the method of actually sending value back to the pic chip eludes meCode:< html> <TITLE>PBP ESP8266 demo</TITLE> <body> <H1>Testing the ESP8266</H1> <H3>Cool stuff!</H3> Page visits: 3 <inputname="v2"value="2"> <inputvalue="1"name="v1"type="submit"> </body> </html>
Re: CHEAP wifi modules, at last!
success
Code:< TITLE>PBP ESP8266 demo</TITLE> <H1>Testing the ESP8266</H1> <H3>Cool stuff!</H3> Page visits: 4 <formmethod="get"action="set"> <inputmaxlength="5"value="2" name ="MyInput"size="5"> <inputvalue="Change MyInput"type="submit"> </form>
Re: CHEAP wifi modules, at last!
Here is a link to a few free software programs that some of you may find useful when testing communication. The TCP tool should be helpful for testing getting info between two ESPs.
https://www.simplecomtools.com/produ...p?idCategory=5
John
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