Pic to GSM Phone connection (HSerin problems)

[Ioannis]

.....

'Send SMS Test-Message
sms:

HSerout ["ATZ",13,10]
Pause 1000 <<<<<<<<<<<<<< [1]

HSerout ["AT+CMGF=1",13,10] 'Set Text Mode
Pause 500 <<<<<<<<<<<<<< [2]

HSerout ["AT+CMGS=",34,"+447895711481",34,",129",13,10]
Pause 500 <<<<<<<<<<<<<< [3]

HSerout ["Test-Message",10,13]
HSerout [26]
Pause 500 <<<<<<<<<<<<<< [4]

RETURN ' return from subroutine

General all the above lack the response from the mobile. Every command has a response and that response comes with different timing. Other sooner other later.

So my suggestion is to:

[1]: Wait for the 'OK' response
[2]: Wait for the 'OK' response
[3]: Wait for the '>' response
[4]: Wait for the 'OK' response

Also, have put the phone in TEXT mode or is it in PDU mode?

A monitor on the RS232 lines to see what text is transmitting to both ends would be very helpfull. If your PC has a second Port use it for stealling the signals with two 10K and drive the Rx pin of the second RS232 com port.

Ioannis

[isaac]

Ioannis

Thanks for your quick reply.
i delibrately removed the WAITS as i was debuging the phone because the phone was not sending any response back my program kept looping in sms.
i have only got one serial port on my pc so would be able to experiment as to your suggestion.
Is it true that i just neeed Tx/Rx & Gnd connection?

Here is my original code
Define LOADER_USED 1
Include "Modedefs.Bas"
DEFINE OSC 20

DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 9600
DEFINE HSER_CLROERR 1
' Define LCD connections
Define LCD_DREG PORTD
Define LCD_DBIT 4
Define LCD_RSREG PORTE
Define LCD_RSBIT 0
Define LCD_EREG PORTE
Define LCD_EBIT 1


' Define program variables
col var byte ' Keypad column
row var byte ' Keypad row
key var byte ' Key value


OPTION_REG.7 = 0 ' Enable PORTB pullups

ADCON1 = 7 ' Make PORTA and PORTE digital
Low PORTE.2 ' LCD R/W low (write)

Pause 100 ' Wait for LCD to start

Lcdout $fe, 1, "Press any key" ' Display sign on message

loop: Gosub getkey ' Get a key from the keypad
Lcdout $fe, 1, #key ' Display ASCII key number
if (key =5) then
gosub sms
endif
Goto loop ' Do it forever


' Subroutine to get a key from keypad
getkey:
Pause 50 ' Debounce

getkeyu:
' Wait for all keys up
PORTB = 0 ' All output pins low
TRISB = $f0 ' Bottom 4 pins out, top 4 pins in
If ((PORTB >> 4) != $f) Then getkeyu ' If any keys down, loop

Pause 50 ' Debounce

getkeyp:
' Wait for keypress
For col = 0 to 3 ' 4 columns in keypad
PORTB = 0 ' All output pins low
TRISB = (dcd col) ^ $ff ' Set one column pin to output
row = PORTB >> 4 ' Read row
If row != $f Then gotkey ' If any keydown, exit
Next col

Goto getkeyp ' No keys down, go look again

gotkey: ' Change row and column to key number 1 - 16
key = (col * 4) + (ncd (row ^ $f))
Return ' Subroutine over

'Send SMS Test-Message
sms:
HSerout ["ATZ",13,10]
HSERIN 5000, SMS,[WAIT("OK")] ' wait for response ok for 5 seconds
HSerout ["AT+CMGF=1",13,10] 'Set Text Mode
HSERIN 5000, SMS,[WAIT("OK")] ' wait for response ok for 5 seconds
HSerout ["AT+CMGS=",34,"+447895711481",34,",129",13,10]
HSERIN 5000 , SMS, [WAIT(">")]
HSerout ["Test-Message",10,13]
HSerout [26]
Pause 500

RETURN ' return from subroutine

[Ioannis]

You are welcome.

Of course I cannot debug from here, but can suggest to send the commands from terminal program and check what the phone responds.

If all seems OK then check if the PIC communicates OK with the terminal window and you emulate the phone by typing the responses (you have to be quick here...!)

Also check the settings of the DEFINES for the Baud and XTAL you use. I don't remember if these you use are correct.

Ioannis

[isaac]

Just a quick one
Do i need RTS and DTR etc as those are not connected on the LAB-X1 Experimenter board ?

Isaac

[isaac]

Just tried it with RTS/DTR tried to +5v but still no joy
maybe i need to get another nokia cable

Isaac

[Ioannis]

First you do not need to use the RTS or other signal as long as you have low data rate and be able to process the data. I am using the 9600 mobile modem to transfer blocks of 66 bytes without any problem.

Second, have you check if the phone responds as I stated in my previous post?

Have you also checked the responses from your controller (PIC)?

What were the results?

Ioannis

[isaac]

As stated the phone response ok and i can even send & receive sms
but only when its connected to the pc
My Pic also works correctly as i can send and receive via the serial port
via hyperterm
This is strange