Pic to GSM Phone connection (HSerin problems)

[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

[Lotondo]

Kasamiko,

thanks for sharing your project.
I built it according to your above schema but the test I did had no success.
The pics receive 2.8 V. from the phone, is that enough ?
IC2 has your software with my data (phone nr. + text)
IC1 has the the software found at http://www.atrox.at/datacable/dlr3/dlr1.hex
LED1 is always flashing
LED2 is just flashing once.
Could you pls. tell me the pic config (osc, wdt, pwrt) ?
What's the purpose of diode zener (D5 2.7) ?
Thanks your or anyone else support.

Lotondo

[kasamiko]

That circuit is drawing power from the phone..2.8VDC is enough since this is the maximum the phone can supply. Please remove that zener Diode that was left when I was experimenting powering it with external power supply.
I think you have the problem with the HEX you used for the DLR-3P part since LED1 will light steadily. You used the wrong HEX! this is the link for the 8 Mhz version..http://www.atrox.at/datacable/dlr3/dlr2.hex
LED2 will continously blink meaning it is sending SMS.

[Lotondo]

Kasamiko,
thanks for answering.
I did what you said.
Now the LED1 is always on and not flashing like before. This should be ok.
Led 2 is just flashing once cause I turn the loop off.
Till here should be everything correct but I dont receive any sms on the
other cellphone.
Testing my phone (7110) with a DLR3P cable (Nokia cable) and hyperterm I noticed that it worked only at 19200 baud. I knew that it should also work with a lower baud but it did not. Maybe it's the DLR3P cable that 'force' it works at 19200.
Btw here is "my" code pls have a look.
Thanks again for any further help.
Lotondo

;Device 16F84A
DEFINE OSC 4

BAUD VAR BYTE
LED VAR PORTB.2 ' Assign PortB.2 for Status LED
TX VAR PORTB.1 ' TX to Phone
RX VAR PORTA.0 ' RX from Phone

BAUD = 84 ' 9600,8,N,1(True,driven)

Start:

SerOut2 TX, BAUD,["AT",13]
Pause 500
SerOut2 TX, BAUD, ["AT+CMGF=1",13] ' Use TXT Mode
Low LED ' Turn OFF Status LED
Pause 1000 ' Pause for 1 second
High LED ' Turn ON Status LED
SerOut2 TX, BAUD,["AT+CMGS=",34,"0761111111",34,13]' Prepare the recipient Phone Number
Pause 1000 ' Pause for 1 Second
SerOut2 TX, BAUD,["TEST Message!!",13] ' The message to be sent
Pause 1000 ' Pause for 1 second
SerOut2 TX, BAUD,[26] ' Terminate message with Control+Z (26)
Low LED ' Turn OFF Status LED
Pause 1000
;GoTo Start ' Repeat
End

[Ioannis]

Hi!

All phones default on power up to Autobaud mode. The first connection defines the speed from that moment on upt to the next power up.

This is over ruled only if you define explicitly and store to the phone's memory the speed to use.

So, in your case may be you did a connection with the mobile at 19200 with the Hyperterminal and then without reseting the mobile, did you connected to the PIC circuit? Are you sure the mobile does autobaud at power up?

Ioannis

[Ioannis]

Hi!

All phones default on power up to Autobaud mode. The first connection defines the speed from that moment on upt to the next power up.

This is over ruled only if you define explicitly and store to the phone's memory the speed to use.

So, in your case may be you did a connection with the mobile at 19200 with the Hyperterminal and then without reseting the mobile, did you connected to the PIC circuit? Are you sure the mobile does autobaud at power up? If it does then you should send an AT command without any parameters to sync the mobile to the speed you set in the beginning of your program.

Ioannis

[Lotondo]

Hello,
as far as I know, I read again the manual, it's not possible to set baud speed to be used through the port. The only set possible for baud speed is if you want to connect to the internet (wap). I tried in any case to set it at 9600 but it did not work.
I checked the at command manual and i did the following check with the cable and hyperterm (19200,8,N,1):
AT+CBST?
> +CBST:0,0,1 the phone is in autobauding
then i typed:
AT+CBST 7,0,1
AT+CBST?
> +CBST:7,0,1 the phone is at 9600 baud
Great, I thought, now i change the hyperterm setting from 19200 to 9600 and let's see !!
Nothing, exactly like before, at + enter, no answer back
I reset the hyperterm to 19200 and i type
AT+CBST?
> +CBST:7,0,1 the phone is still at 9600 baud

Seen that the phone is in autobauding and it's not possible to set via menu
I'll try to add to the code this:

>>CUT
BAUD = 84 ' 9600,8,N,1(True,driven)

Start:

SerOut2 TX, BAUD, ["AT+CBST=7,0,1",13] ' <-------------------------------
SerOut2 TX, BAUD,["AT",13]
Pause 500
SerOut2 TX, BAUD, ["AT+CMGF=1",13] ' Use TXT Mode
Low LED ' Turn OFF Status LED
>>CUT

I have some doubts but I will try
What do you think you guys ??
Bye

[Lotondo]

Hi,
i added this line
SerOut2 TX, BAUD, ["AT+CBST=7,0,1",13]

but no success.

I'm running out of ideas.

Thanks for yr help
Lotondo