In message <rKGdneD-9NayM0fRnZ2dnUVZ_oCdnZ2d@giganews.com>, kamalesh
<kamal.dahagam@n_o_s_p_a_m.gmail.com> writes
>Hi,
>I am doing a project using 8051 and GSM module,SIM900B. I am using a
>8051
>microcontroller to send AT commands to GSM module and store the data in
>an
>array and send the stored data as a text message to a mobile . I am
>able to
>see both gsm module and microcontroller unit working perfectly when
>connected to computer seperately through serial cable,but when I am
>connecting both the devices with the help of a cross over cable, I am
>able
>to send sms using microcontroller and GSM module but unable to receive
>any
>data.I am using a MAX 232 on microcontroller board and SIM300_EVB_V2.02
>for
>placing the GSM module SIM900B.
>expecting a reply at the earliest.
Your serial cable is incorrectly wired.
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Reply by Hans Heinz●November 10, 20102010-11-10
On 11/10/2010 8:37 AM, kamalesh wrote:
> Hi,
> I am doing a project using 8051 and GSM module,SIM900B. I am using a 8051
> microcontroller to send AT commands to GSM module and store the data in an
> array and send the stored data as a text message to a mobile . I am able to
> see both gsm module and microcontroller unit working perfectly when
> connected to computer seperately through serial cable,but when I am
> connecting both the devices with the help of a cross over cable, I am able
> to send sms using microcontroller and GSM module but unable to receive any
> data.I am using a MAX 232 on microcontroller board and SIM300_EVB_V2.02 for
> placing the GSM module SIM900B.
> expecting a reply at the earliest.
Go to www.8052.com and post your question on the forums there.
Ask for Erik Malund, he knows everything.
Hans
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Reply by kamalesh●November 10, 20102010-11-10
Hi,
I am doing a project using 8051 and GSM module,SIM900B. I am using a 8051
microcontroller to send AT commands to GSM module and store the data in an
array and send the stored data as a text message to a mobile . I am able to
see both gsm module and microcontroller unit working perfectly when
connected to computer seperately through serial cable,but when I am
connecting both the devices with the help of a cross over cable, I am able
to send sms using microcontroller and GSM module but unable to receive any
data.I am using a MAX 232 on microcontroller board and SIM300_EVB_V2.02 for
placing the GSM module SIM900B.
expecting a reply at the earliest.
Thanks & Regards,
kamalesh.
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