Pic to GSM Phone connection (HSerin problems)

[isaac]

As stated the phone response ok and i can even send & receive sms
but only when its connected to the pc
My Pic also works correctly as i can send and receive via the serial port
via hyperterm
This is strange

[isaac]

I think i would have to make the DLR3-p of Atrox as knowone seems to have used the original nokia data cable to communicate with the pic

Isaac

[Ioannis]

Since you can send and receive with the current cable I don't see why you should change it.

Also please note that the phone might send other characters too, like more CR and LF.

You said you have only one Com on you PC, ok. You can do a "thief" with two 10K (or even 4K7) that take samples of the Tx and Rx signals while PIC and Mobile are connected together and send them to the Rx pin of the PC Com Port, just to monitor what they are doing while you are not looking. This way you will see exactly what the PIC wants the mobile to do, and what exactly is the mobile responding.

Please try to take a Screenshot of this and post it.

Ioannis

[isaac]

Thanks Ioannis

I am gonna do that now and would keep you posted

Isaac

[isaac]

i am trying to upload the screen shots but keep getting msg that this exceeds 200kb

[isaac]

I dont know what happened to my last post.
i was trying to attach the screen shots but couldn't.
i connected breakout as you suggested and think i know what the problem is but not the solution lo
When i connected the Tx/Rx to the Rx of the Pc when i run my program
the pic is not sending anything to screen at all so this means the phone is not receiving anything so its not responding.
But if i then disconnect the phone DLR-3 cable from the serial port of my project board i can see the AT command being sent to the phone on screen so i think the phone cable maybe faulty.
i am still trying to get the shot to you but keep getting this massage below

Your file of 1.08 MB bytes exceeds the forum's limit of 200.0 KB for this filetype.

Isaac

[Ioannis]

Make the file smaller jpg, png, bmp. No more than 200kb. This size is more than enough!

About the problem not monitoring try smaller resistors like 4K7 or smaller. May be your driver from the PIC side is not powerful. What chip do you use?

Ioannis

[isaac]

i use Max232 which comes with the project board