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gruveemaan
Joined: 17 Oct 2003 Posts: 4
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Cannot Communicate with Modem: Nokia 7110 |
Posted: Wed Mar 03, 2004 2:51 pm |
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Hi,
I am trying to connect my mini877 board and use it to dial out using a phone as a modem (using a DLR-3 cable). I am not seeing anything coming back to the pic board from the modem when I send the "AT\r" to the phone.
I know I am sending the "AT" string OK, because when I connect the pic serial port to the hyperterm, I see "AT" displaye on the hyperterm and when I press a key on the hyperterm, I see the received character on the pic.
If I use the hyperterm and connect it to the phone and send "AT", I get an "OK" back.
Note: I am communicating with the phone ONLY using 2 wires (TX/RX)from the PIC board
Kindly advice. |
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Neutone
Joined: 08 Sep 2003 Posts: 839 Location: Houston
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Posted: Wed Mar 03, 2004 3:38 pm |
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Are you saying that you are not using a signal ground? Just 2 wires? |
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gruveemaan
Joined: 17 Oct 2003 Posts: 4
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Posted: Wed Mar 03, 2004 4:52 pm |
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Sorry for the confusion. I am only using TX/RX |
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gruveemaan
Joined: 17 Oct 2003 Posts: 4
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Posted: Wed Mar 03, 2004 4:54 pm |
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Opps! forgot to mention GND. These are the only 3 wires that are available on the CCS 877miniboard. |
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