SMS using microcontroler

[shafqatkhan]

a1018s at

i am trying to send sms using microcontroller i wan to connect my erricsson A1018s with microcontroller i send simple "AT" command to get "OK" i am unable to get any response my code is given below


org 0h

mov TMOD,#20h
mov TH1,#-3
mov SCON,#50h

mecome:
CLR TI
CLR RI

LCALL SYCRONIZE

SETB TR1



mov SBUF,#"A"
here: JNB TI,here
CLR TI

mov SBUF,#"T"
again: JNB TI,again
CLR TI

mov SBUF,#0Dh
last: JNB TI,last
CLR TI

LCALL DELAY

wait: JNB RI,wait
mov A,SBUF
mov R1,A
mov P1,R1
CLR RI




wait2: JNB RI,wait2
mov A,SBUF
mov R2,A
mov P1,R2
CLR RI

LJMP mecome


SYCRONIZE: mov R3,#128
SETB TR1
loop:
mov SBUF,#55H
sabar: JNB TI,sabar
CLR TI
djnz R3,loop
RET

DELAY:
mov R4,#0FFH
for: djnz R4,for
RET

end



plz tell me what i do to solve my problem
anybody who has done this project please contact me
my email is
shafqat.ullah@hotmail.com

 

[sivasujith]

most of the GSM modem needs a carriage return <CR> after the message.... this terminates the message and only then the gsm modem sends the message.. make sure with this and then check... also check the AT command for ur A1018

 

[itsfanidotcom]

first of tell me for connecting ur mcu to mobile u need an interface.. i mean u have used DB9 for this purpose... which pins of db9 connector u r using and for what purpose... similarly the mobile works on handshaking... which pins of the DB9 connector are u using for handshaking.... can u send the schematic????
this can solve ur problem...

 

[MAfrooz]

pleaze put your shematic of board
thanks for IT

 

[itsfanidotcom]

ya upload ur schematic for better understanding

 

[PERROR]

HAI
has any one any idea about old nokia phones supporting at commands
please guive me a link

Added after 25 minutes:

no one helps

Added after 3 seconds:

no one helps

 

[nan_ishan]

pleas e look at its date /////////its long ago

 

[itsfanidotcom]

usually ericsson phones support at commands.. u can try the older ericsson phones like
t-610. t-290, and t-10...these all support AT commands

 

[asifrehmat]

I did this project using Ericson t-290. It is straight formward.

 

[engman]

baud rate is improtant too and depending on the baud rate you should be careful while choosing the clock signal/oscillator. and as my friend said you should send cariage return or what the ericson's technical data says to proceed your command.

 

[jvincent_129]

I did this project using Ericson t-290. It is straight formward.

could i ask for source codes? pls... [emailxxxxxxxxxxxxxxx@yahoo.com[/email]

what MCU did u use? complier? C-language?

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