serout

[HenrikOlsson]

Hi,
Generally you should be fine with the resonator. Are you sure that the PIC is running? Blink a LED a few times at the beginning of the program to make sure. And if you can, try with a X-tal just to be sure.

You do have the PIC's ground and the modems ground connected don't you? The modem ground should be on PIN 5 in the DB9 but you didn't mention that in your original post.
I have no knowledge of AT commands so I can't help with that but assuming it's correct have you tried:

SerOut Tx,t300,["ATH1"] ' Off Hook ATH1

Also, is it possible that the modem needs a linefeed and/or carrage return at the end of the command?

/Henrik Olsson.

[mychangl]

the LED is blinking. i even put LED to monitor the serial output, it is flickering. Modem ground is connected to PIC gnd.

neither
SerOut Tx,t300,["ATH1"]
SerOut Tx,t300,["ATH0"]
SerOut Tx,t1200,["ATH1"]
SerOut Tx,t2400,["ATH1"]
SerOut Tx,t9600,["ATH1"]

work, i not sure about line feed or carriage.There is no information about linefeed and carriage found in any modem articles, even hyperterminal doue not require that..

Anyway, let me try

[paul borgmeier]

Something to try - see if you can get your pic to talk to hyperterminal (using your max232 setup as is). This might help you determine if the problem is closer to the PIC side or closer to the modem side.

[mychangl]

Thanks guys. i got the code....

it should has carriage return ( 13 ) after the command.

SerOut Tx,t9600,[65,84,72,49] ' Off Hook ATH1'
SerOut Tx,t9600,[13]

now i am looking into more functions eg connect to other modem...

Thx a lot !
Cheeeeers

[HenrikOlsson]

Hi,
Glad to hear you got it going!
A little tip: Put the carriage return on the same line as the 'command'

SerOut Tx,t9600,[65,84,72,49,13] ' Off Hook ATH1, CR

Should work the same and you'll save a couple of bytes for each instance. Also Serout....["ATH1",13] should work the same but makes the code easier to understand, to me atleast....YMMV.

Good luck with the project!

/Henrik Olsson.

[mychangl]

That is just the beginning...
["ATH1",13] work fine ! Thanks for all your suggestion.