Pic to GSM Phone connection (HSerin problems)

[aruran]

I got an Ericsson T18 phone, which works with the data cable for AT commands.. Going through the internet I found that it doesn't support Text mode, Only pdu mode available. So can I make it work by using bitmaniac's PDU decoder. And I am going to use PIC16F877A. If I do the necessary changes it should work right......

thanks in advance
aruran

[PIC Coder]

Hello,
I am look out for technical details of Samsung SCH-N356. I also want to make SMS controled relay. Please suggest.
Bye

[aruran]

Hai all,

First of all thank you all for the help rendered. I have successfully made a Ericsson T18 to send SMS using PIC16F877A. I give the PIC using I2C bus some data from a main PIC for my microcontroller project. I have written a dynamic PDU encode routing to handle the dynamic texts sent by the main pic. This was achieved mainly from the help of bitmaniac's PDU encode...

Thank you all
aruran

[NavMicroSystems]

aruran,

it would be nice if you would share youre code.

[MICOCALI]

What is the metod for write a code in 16f628 for read in rs232?
when the telephone send (*elip string, my 16f628 to be one pin at gnd

[kasamiko]

I just finished my circuit below a PIC to cellphone interface to send text messages..I can succesfully SEND a pre-programmed text message using this code:



Device 16F84A
Declare Xtal = 4

Start:
LOW LED
DelayMS 1000
SerOut2 PORTB.1, 84,["AT+CMGS=",34,"MyNumber",34,13]
DelayMS 1000
SerOut2 PORTB.1, 84,["TEST",13]
DelayMS 1000
SerOut2 PORTB.1, 84,[26]
DelayMS 3000
GOTO Start

I can send an endless "TEST" text messages to "MyNumber" but I can't make it work to read received text messages..

I need a code sample that will READ the received text message and will text back to the sender the word "GOOD"

I don't have the idea how to strip the sender phone number and the sent text message "GOOD" from the example below using SERIN command..

+CMGR: "REC READ","+xx1234567890",,"05/05/26,17:19:23+00"
GOOD
OK

I'd look at this code:

HSerin 5000, Loop, [Wait("UNREAD"), skip 3, STR Caller\12, skip 4, STR GSMTime\17, skip 4, STR GSMbuffer\12]

But I can't "SAY" it using SERIN command using PIC16F84..

Thanks for any info..

[aruran]

aruran,

it would be nice if you would share youre code.

Hai NavMicro,

Sorry for the delayed response. I was involved in the project in another part..So I couldn't concentrate on the SMS sending part as it is almost finished.

I have finished the PBP coding to send SMS using a Ericsson T10. It uses PDU mode since T10 supports AT command for PDU mode. So help from bitmaniac's PBP file helped me.
I have attached the file.

I also want to develop this to be integrated into a Embedded IP module for my project. I want to know how can I make this SMS sender to send sms when a centrallized MCU gives an interrupt and then the datas such as message, recepient number and so on are fed from that centrallized MCU to the MCU that controlling sending sms.

Some people say that the PBP is not good for interrupt handling, and ASM codes inserted may be of use. Have anybody got any idea....

thanks
aruran

[Airrr]

i've read this thread a few times, but it wont work at all!
nokia 6210 connected with RX to PIC 16f84a port b.1
gnd2gnd

now thats the programm

SerOut2 PORTB.1, 396,["AT", 13, 10]
Pause 1000
SerOut2 PORTB.1, 396,["AT+CMGF=1", 13, 10]
Pause 500
SerOut2 PORTB.1, 396,["AT+CMGS=", 34, "+972544567209", 34, 13, 10]
Pause 500
SerOut2 PORTB.1, 396,["Test-message", 13, 10]
Pause 500

i tryed 8mhz crystal and 12mhz
pic sends some pulses out, but mobile just do nothing
is it a wrong programm or what?

ps, i need simply to send SMS.
i think i missed something important..

[bitmaniac]

First of all I would like to say a big HELLO! to all of you.

I was out of this forum for some months and I really like the fact that this topic is of so great interest , while I am back.

SO back to PICs again..

Airrr:
I would advice you to read all the related topics about sending sms with Gsm ,
so to take an idea of how this works.
But to make you start:
A simple way to test if your phone is working ok (making sure you have checked the connections) you can connect it to your PC serial port and try sending AT commands using a terminal program like HyperTerminal for example
(set speed 9600,8,n,1)
OF COURSE YOU HAVE TO USE A RS232 LEVEL CONVERTER as your serial port
works with rs232 level volt (+-12v) and your Nokia ecpects TTL level volt (+-5v).

Second, as reading your code I noticed that you are trying to use NOKIA 6210 in 'text mode' and I am not sure that 6210 supports text mode.
I think it only supports PDU mode but I am not 100% sure.
You have to encode your text sms in PDU format in order to 'feed' it to your phone trough AT commands which is a complex procedure with pic but IT IS possible -please read through the topic to get an idea.

I hope I have helped you a little

AGAIN A BIG HELLO TO ALL OF YOU!

[kasamiko]

i've read this thread a few times, but it wont work at all!
nokia 6210 connected with RX to PIC 16f84a port b.1
gnd2gnd

now thats the programm

SerOut2 PORTB.1, 396,["AT", 13, 10]
Pause 1000
SerOut2 PORTB.1, 396,["AT+CMGF=1", 13, 10]
Pause 500
SerOut2 PORTB.1, 396,["AT+CMGS=", 34, "+972544567209", 34, 13, 10]
Pause 500
SerOut2 PORTB.1, 396,["Test-message", 13, 10]
Pause 500

i tryed 8mhz crystal and 12mhz
pic sends some pulses out, but mobile just do nothing
is it a wrong programm or what?

ps, i need simply to send SMS.
i think i missed something important..

I succesfully done it using this code..

Device 16F84A
Declare Xtal = 4

Symbol BAUD = 84 ' 9600,8,N,1(True,driven)
SYMBOL LED = PORTB.2 ' Assign PortB.2 for Status LED
Symbol TX = PORTB.1 ' TX to Phone
Symbol RX = PORTA.0 ' RX from Phone

Start:

SerOut2 TX, BAUD,["AT",13]
DelayMS 500
SerOut2 TX, BAUD, ["AT+CMGF=1",13] ' Use TXT Mode
LOW LED ' Turn OFF Status LED
DelayMS 1000 ' Pause for 1 second
HIGH LED ' Turn ON Status LED
SerOut2 TX, BAUD,["AT+CMGS=",34,"Recipient Phone Number",34,13]' Prepare the recipient Phone Number
DelayMS 1000 ' Pause for 1 Second
SerOut2 TX, BAUD,["TEST Message!!",13] ' The message to be sent
DelayMS 1000 ' Pause for 1 second
SerOut2 TX, BAUD,[26] ' Terminate message with Control+Z (26)
LOW LED ' Turn OFF Status LED
DelayMS 1000
Goto Start ' Repeat
End

What i did is some sort of SMS bomber...look for the circuit I posted before to make this code works..
Notice that all it does is send..TX. I dont process any message I received so RX was not used.
BR