how to send an SMS??

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irfanhab

Joined: 09 Aug 2004
Posts: 48

04 Jun 2005 7:28 send voltage thorugh sms

Hi,

I'm developing a security system where I require to send an SMS, through electronic means, not by manual dialing, now I know one solution could be to hook up each individual button on a cell phone and have a microcontroller dial it by successively shorting each button.
But is there any approach say where I could send data in 'serial' format to the cellphone and it could accept it and then some other commands to make it send the sms at a specified phone number.
Is there any way to controll a cellphone fully via a microcontroller??

Added after 58 seconds:

And besides, is there a way I can intercept incomming SMS to redirect them in text form to the microcontroller and have some processing carried out on them

C-Man

Joined: 19 Jul 2001
Posts: 1235
Helped: 73

04 Jun 2005 7:50 sms pdu decoder with proton

Hi,

your problem has been dicussed here a lot of times.

Search the board for "PIC SMS" or search my posts and you will find nearly all that you need ...

best regards

IanP

Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast

04 Jun 2005 10:54 atmel send sms

I am not sure which microcontroller will be of your interest, PICs, AVRs, ... 8051 ..
Anyhow, here is a link to a project on how to send SMS with NOKIA mobile phone and ATMEL microcontroller:
http://www.siliconchip.com.au/cms/A_102670/article.html
This article may give you some ideas on how to develope your project.
Regards,
IanP

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04 Jun 2005 10:54 Ads

SAWS

Joined: 11 Aug 2005
Posts: 3

12 Aug 2005 0:04 baterai dummy siemens c55

Hello

Would you please help me to send any circuit schematic for connecting Siemens mobile C55/M55 serial cable with mcu AT89c51 Atmel series. Question

I am making a project of sending status as SMS thru GSM. Neutral

I completely understand PDU format and AT commands. Neutral

I just want to know how to connect the serial data cable of Siemens mobile and mcu AT89C51 with each other. Question

I directly connect this serial cable with PC serial port and send SMS but I want to do this SMS by mcu AT89C51. Neutral

Plz help me! Crying or Very sad

Thanx for your forum. Exclamation

aldevan

Joined: 02 Aug 2005
Posts: 147
Helped: 12
Location: São Paulo - Brazil

12 Aug 2005 1:21 siemens rx/tx send sms

see the website have a lot of links to SMS/GSM/GPRS
http://links.eletronicaonline.com

SAWS

Joined: 11 Aug 2005
Posts: 3

13 Aug 2005 13:32 at89c2051 + send sms

I have seen the link of electronicaonline.com and I found some useful sites.
But I didnot find the schematic for the connection between mcu Atmel AT89C51 and Siemens Mobile M55/C55 serial data cable.
So could any one plz help me?

aldevan

Joined: 02 Aug 2005
Posts: 147
Helped: 12
Location: São Paulo - Brazil

13 Aug 2005 18:25 schematics intercept sms text

look this if it work, schematic and Pin-out of connector, some cable get VCC from serial port from DTR and RTS, if you want use it in microcontroller is better you use independent VCC because you have to use only TX and RX from microcontroller

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ahm_hassaan

Joined: 17 Feb 2005
Posts: 34
Helped: 5

15 Aug 2005 8:50 t290 tx voltage

Peace upon you

aldevan wrote:

this circuit used when you have RS232(from PC directly) but here if you use AT89c51 you have TTL levels i mean 0 & 5V not RS232 levels, So you don't need IC "max 232" as you have the same level of mobile. you need to connect Tx with RX and vice verse, and i think you'll need to connect 12V to mobile also

SAWS

Joined: 11 Aug 2005
Posts: 3

15 Aug 2005 22:43 sms command in t290i

I think I am not clear to make you understood of my problem.
I have a Siemens C55/M55 mobile and its serial data cable. I have send SMS by connecting it directly to PC serial port and using Windoiws HyperTerminal program. I know what AT commands are used for SMS.
My main problem is that now I dont know how to connect AT89C51 with RS232-connector of mobile's serial data cable.
I require
mobile ----------- mcu
RXD | | TXD
TXD | Interface | RXD
GND | | GND
......... ------------- .........
Thanx a lot for your schematic and posts.

aldevan

Joined: 02 Aug 2005
Posts: 147
Helped: 12
Location: São Paulo - Brazil

15 Aug 2005 23:51 buck up sms c55 software

hi SAWS, this is correct, TX with RX, RX with TX and GND to GND, now you have to
make a program to 89C51 with seting baud rate and send commands AT the same a hyperterminal, if you make with hyperteminal is the same

techie

Joined: 05 Feb 2002
Posts: 850
Helped: 43
Location: Pakistan

16 Aug 2005 6:11 pic c55 rx tx voltages

Siemens C55 Rx,Tx are on 3.3V logic. I think driving it at 5V will damage the phone.

aldevan

Joined: 02 Aug 2005
Posts: 147
Helped: 12
Location: São Paulo - Brazil

16 Aug 2005 6:15 nokia 6110 sms control schematic

are you sure is 3,3V? because in diagram schematic is 5V, but if is 3,3V you can usa a resistor with a zener diodo 3v3 to limite voltage in RX from cellular

C-Man

Joined: 19 Jul 2001
Posts: 1235
Helped: 73

16 Aug 2005 7:48 hyperterminal 1100 security sms

Even the older Siemens phones operate at 3.6 V (battery voltage).

Simply put a 10K current limiting resistor in series with the TX line from the microcontroller, the phones have diodes that protect from overvoltage inside so there will be no damage ...

best regards

traxonja

Joined: 06 Apr 2004
Posts: 109
Helped: 1

16 Aug 2005 10:59 siemens send sms serial

C-Man wrote:

This is correct, the only problem you might come up with is loosing the network when PIC tryes to talk to the phone @ 5V.

techie

Joined: 05 Feb 2002
Posts: 850
Helped: 43
Location: Pakistan

16 Aug 2005 17:54 at command send sms m55

It seems that Siemens phone pulls down the RXD line when it receives a voltage higher than 3.3V. There is nothing wrong with the phone since i tried 3 different ones. Or is it that the phone thinks that it is connected to USB and swithces the interface to USB.

ahm_hassaan

Joined: 17 Feb 2005
Posts: 34
Helped: 5

17 Aug 2005 8:05 sms by at89c2051

SAWS wrote:

salam,

I know what you mean you need to make MCU as computer have RS232 port so you need IC as "max232" to convert from TTL levels to RS levels then connect it dirctly to RS plug, you will have now serial port as computer, {if you download data sheet of this IC you can find it connection easily}.

MCU ===> max232 ===> serial plug ===> mobile cable ===> mobile

You must take care to connect Tx in the first 3 block were the same, and also Rx

Added after 7 minutes:

http://www.beyondlogic.org/serial/serial.htm

I think it may help you.

un-2000

Joined: 18 Feb 2002
Posts: 45
Helped: 1
Location: colombia

06 Sep 2005 3:28 tx rx nokia 1100 baud rate hyperterminal

please visit: spanish webb page
http://www.maicas.net/
is gps alarms gps
write us a mail
i have the protocol gsm pdu for cellular phone for pic micro
write in proton plus compiler
un2000(at)geo.net.co

dwitek

Joined: 06 Sep 2005
Posts: 1
Location: PL

06 Sep 2005 18:11 how to send message to sao paulo cell phone

You can try my simple example written in C for 8051. This sample was tested in configuration AT89C2051 <-> C35 and T10s.

Required connections: 8051-Cellular: Txd-Rxd, Gnd-Gnd.
uC sends SMS: !!! ALARM !!! when appears "Sensor" signal

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techie

Joined: 05 Feb 2002
Posts: 850
Helped: 43
Location: Pakistan

08 Sep 2005 5:22 send sms with at89s51

This is tooo simple. Can you post some C routine that can encode / decoder PDU to text and send / receive sms.

VirtualThread

Joined: 04 Aug 2005
Posts: 85
Helped: 4

08 Sep 2005 6:47 rs232 help code with dtr proton

This has been discussed in other threads already like Nokia F-bus or M-bus thread or how to interface Nokia 3310 to send info through SMS etc. Please search the site.

traxonja

Joined: 06 Apr 2004
Posts: 109
Helped: 1

08 Sep 2005 7:59 nokia 5110 ttl commands atmel

Dude, you need Nokia 7110 or 5110 or 6110 or equivalent with DLR-3P cable. If you don't have original DLR-3P nokia data cable, you can build one from here: www.atrox.at

After that, you just connect to Nokia at 19200 8N1 standard serial communication and you have TEXT SMS, not PDU Smile

You can try it with HyperTerminal or similar program before implementing anything to microcontroller.

Regards,
Trax
www.elektronika.ba

miss_monica

Joined: 19 Sep 2006
Posts: 51

09 Apr 2007 15:42 c man say sms software

hello friends how are you i am also doing this project on connection of mobile with microcontroller i have a 6310 . the at commands work well withh hyperterminal but when i send these commands from the microcontroller there ,it doesnt work. i mean the mobile just echos the command send to it when i have the gnd removed and only tx and rx connected . but when i connect the gnd it doesnt even echo .
i dont even know which pins to connect i mean i have just connected the tx and rx to the 8051 the rest are just open . do i have to connect the rest of the pins in some manner please help

coloory

Joined: 15 Jul 2007
Posts: 6

18 Jul 2007 0:45 m55 mcu

aldevan wrote:

hello friends

I need doing it for nikia 5110. if may it ... please help me .

how to this circuit for nokia 5110 or 6110.

thank yuo

kelvin_foru

Joined: 19 Jul 2007
Posts: 5
Helped: 1

19 Jul 2007 10:16 3310 battery pinout resistor

There is a project in
http://www.8051projects.info/projects.asp
which can control devices through SMS with Nokia 5110.

Kelvin

ahmedez2001

Joined: 10 May 2008
Posts: 2

10 May 2008 1:25 serial port sending sms nokia 5110

hi all , ihave problem with my project i making sms remote controller i connect the mobile sony ericsson (T290i) with (atmega8535) micro controller the controller send AT COMMAND to hyper terminal correctly but my problem is :

no response when connecting uc to mobile
it might be not matching in volt i use max 232
what can i do ??? if any one know the matching volt between the controller and sony ericsson please send me

please i want the answer as fast as possible

davemaster

Joined: 23 Jan 2007
Posts: 96
Helped: 1

30 May 2008 8:40 how sms go from at89c51 microcontroller to mobile

ahmedez2001 wrote:

Greetings,

Man, we need schematic, pic name, and code to help you successfully...

Meanwhile, i think the sony ericsson phone works at 3.3V, and i guest the pic you're using is 5V powered... so, you need a way to interface 3.3V to 5V, and check the rs232 speed.... in both: the pic, and the phone (i think this works at 9600 baud by default).

Good luck

kavs123

Joined: 05 Oct 2008
Posts: 2

05 Oct 2008 5:54 sms at89c

Hello people!!
Can some one please help me with my project????
The problem is- Ihave have to send an SMS to a cell phone from a microcontroller whenever an alarm is triggered.I want to know which technoogy i should use.
Please help me!!!!!!

davemaster

Joined: 23 Jan 2007
Posts: 96
Helped: 1

08 Oct 2008 22:58 nokia 5110 sms alarm schematic

kavs123 wrote:

Greetings,

First. What mobile phone are you planning to use?

Good luck!

kavs123

Joined: 05 Oct 2008
Posts: 2

09 Oct 2008 5:03 pdu sms greek

The cell phone i'm planning to use is Nokia 1100.
The microcontroller is PIC18F2220.
Let me know asa.
Thanks a lot.

tenzin

Joined: 09 Oct 2008
Posts: 2

09 Oct 2008 20:06 siemens m55 rs232 sms at

I've got 50 bucks for any one who can offer a full (Dummy version) schematics how to guide to control cell phone via PIC (other chips ok) which would allow the inputted data to automatically be sent to a predetermined number. Then cycle to ready the phone to recieve another string of data input.

150 Bucks for any one with enough time on their hands to make a prototype.
Thanks
Tenzin trekrocker(at)gmail.com

Added after 1 minutes:

Oh yeah. I'll pay for all equipment. ie. phone, chip board, cables, etc. etc.
Thanks
Tenzin