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sms based Lcd Display

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Moderators: Ajay Bhargav, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph, ExperimenterUK, DavesGarage, majoka

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majoka

Wed Feb 15 2012, 05:50AM

Registered Member #22104

Joined: Thu Sep 10 2009, 03:04PM
Location (Home Town): Wah Cantt, Pakistan
Posts: 3900

@ Alvanbert
yes the code is correct
i use it with gsm modem and its works
u need t capture a event of new message notification

same thing is for cell phone as well as modem
which cell phone or modem ur using

Alvanbert

Wed Feb 15 2012, 09:14AM

Registered Member #37274

Joined: Fri Feb 10 2012, 02:33PM
Location (Home Town): Kampala
Posts: 33

Hi Majoka, Thanks for yr reply. Pliz show me how i can integrate the capture of the new message notification into the code.
the Code above the last post i made has a code from Ajay that Kiran told me to use which i think is meant for this but i dont know how to integrate it.

Am using a Huawei Modem E160...its A USB modem

kirangowle

Wed Feb 15 2012, 10:50PM

Registered Member #26972

Joined: Thu Mar 18 2010, 09:18AM
Location (Home Town): Bangalore, Karnataka
Posts: 587

In that same post its there read notification()
implement it in main program. u ll get.

Alvanbert

Thu Feb 16 2012, 10:07AM

Registered Member #37274

Joined: Fri Feb 10 2012, 02:33PM
Location (Home Town): Kampala
Posts: 33

hi guys. i av been working on different though am yet to come to a successful conclusion. i want u to tell me whether this would be possible.

1. Is it possible to increment the 1 using aloop in the the command in the line ..SMSString( "AT+CMGR= 1 \r");...so that it can be able to read
( "AT+CMGR= 2 \r");, ( "AT+CMGR= 3 \r"); ( "AT+CMGR= 4 \r");...so that it can check from address 1-5 using a variable e.g n

2.If The above is okay....in case my simcard receives messages greater that the variable stated, i want it to delete the oldest message..which in this case would be the message at n=1 and replace it with the newest and the loop continues.

kirangowle

Thu Feb 16 2012, 11:04PM

Registered Member #26972

Joined: Thu Mar 18 2010, 09:18AM
Location (Home Town): Bangalore, Karnataka
Posts: 587

In SMSString() its not possible to increment no.
Do like this
SMSString("AT+CMGR=");
tx0(var++);
SMSString("\r");

Second method also can be done.As soon as you receive a msg read/store it and delete it.So that when next msg arrives it sits in 1st location only.

Alvanbert

Fri Feb 17 2012, 09:44AM

Registered Member #37274

Joined: Fri Feb 10 2012, 02:33PM
Location (Home Town): Kampala
Posts: 33

Thanks Kiran. But the problem now is tx0 function is supposed to output unsigned characters and yet i think the variable will be an integer.
i have tried to declare the (var) as an integer globally but wen the program runs the "AT+CMGR = " doesnt pick up the digit..so in the terminal it displays as shown in the snapshot below

secondly, KiRAN said

Second method also can be done.As soon as you receive a msg read/store it and delete it.So that when next msg arrives it sits in 1st location ony

How can i do this.. thought it would be easier to read from message location 1,2,3,4,5 then back to 1...through the loop i was suggesting above...
so when a new message arrives after location 5 has been filled..instead of storing it in 6, i will delete message in location 1 and place it there and the loop continues..... I hope am clear enough..

THANKS

Ajay Bhargav

Tue Feb 21 2012, 06:06PM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 07:56AM
Location (Home Town): Punjab, India
Posts: 12597

var must be converted to ascii first before sending it to modem. and "AT+CMGR=" without spaces around '=' sign

Alvanbert

Wed Feb 22 2012, 05:47PM

Registered Member #37274

Joined: Fri Feb 10 2012, 02:33PM
Location (Home Town): Kampala
Posts: 33

Thanx A jay but problem is i dnt knw how 2 convert variable 2 ascii. Pliz enlighten me on how to do this. Thanx

ExperimenterUK

Wed Feb 22 2012, 06:08PM

Registered Member #9602

Joined: Tue Aug 05 2008, 07:15PM
Location (Home Town): Manchester
Posts: 2856

Alvanbert wrote ...

Thanx A jay but problem is i dnt knw how 2 convert variable 2 ascii. Pliz enlighten me on how to do this. Thanx

For numbers up to 10 the best method is just to add 0x30 to the value.
EG
0 becomes 0x30 which is ascii '0'
1 becomes 0x31 which is ascii '1' etc.

For 10 or above use "printf", "sprintf" or "itoa"
"printf" will often add a lot of code so is best avoided.

Alvanbert

Fri Feb 24 2012, 07:27AM

Registered Member #37274

Joined: Fri Feb 10 2012, 02:33PM
Location (Home Town): Kampala
Posts: 33

Thanx alot guys for your help...now am getting some output on the screen.

Now am left with one disturbing issue though it should be easy.
am failing to create a loop that can display the message onto the lcd from at+cmgr=1 to at+cmgr=5
below is the part of the code where i want to set up the loop pliz help.

CODE:

SMSString("AT\r"); // AT commands to initialize gsm modem

delay_sms(1000);

SMSString( "ATe0\r"); // turn off echo

delay_sms(1000);

SMSString( "AT&W\r"); // save settings

delay_sms(1000);

SMSString( "AT+CMGF=1\r"); // select text mode for sms

delay_sms(1000);

SMSString( "AT+CNMI=2,1,0,0,0\r"); // notification of new sms

delay_sms(1000);

SMSString( "AT+CMGR="); // AT command to read sms

tx0(var++);

SMSString( "\r");

IE=0X90;   // Enable serial interrupt

delay_sms(2000);

/* i get a response like this

// +CMGR: "REC READ" ,"+2347060580383","10/10/23,14:29:33+04"

// device1 off

// Ok. */

// read sms and store in buffer msg1

read_text(msg1);

delay_sms(2000);

IE=0X00;     // Disable all interrupt

while(1);

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