Problem with RX from Nokia 6210 ?

Hi all,

I'm woking on project for "sms remote control" so I can remotely control devices via sms of mobile, I have the nokia 6210 model which support AT commands for simplicity, first I connect the mobile with PC and using Hyperterminal to send AT commands but nothing work so I search until i found the DLR3 circuit so I build it and try again and AT commands working well without any problems , second I need to use PIC16f877A instead of PC so I connect PIC17f877A to (fbus TX and fubs RX ) fo mobile through 1Kohm resistor and send AT command from PIC and working fine , but main problem is I can't recieve anything from mobile but PC recieve , so I don't know where is the problem is't hardware of software
finaly I need to recive anything from mobile and display on LCD , for example we can display mobile model and version

here is my code
@ __config _HS_OSC & _WDT_ON & _LVP_OFF & _CP_OFF
include "modedefs.bas"
define osc 20
DEFINE LCD_DREG PORTB 'LCD data port
DEFINE LCD_DBIT 0 'LCD data starting bit 0 or 4
DEFINE LCD_RSREG PORTB 'LCD register select port
DEFINE LCD_RSBIT 4 'LCD register select bit
DEFINE LCD_EREG PORTB 'LCD enable port
DEFINE LCD_EBIT 5 'LCD enable bit
DEFINE LCD_BITS 4 'LCD bus size 4 or 8
DEFINE LCD_LINES 2 'Number lines on LCD
DEFINE LCD_COMMANDUS 2000 'Command delay time in us
DEFINE LCD_DATAUS 50 'Data delay time in us

DEFINE HSER_BAUD 9600 'Hser baud rate
DEFINE HSER_SPBRG 129 'Hser spbrg init
DEFINE HSER_RCSTA 90h 'Hser receive status init
DEFINE HSER_TXSTA 24h 'Hser transmit status init
DEFINE HSER_CLROERR 1


b0 var byte
b1 var byte
b2 var byte
b3 var byte

pause 1000 'wait for screen to sort get started
input portc.5
output portc.4

main:
lcdout $FE,1, "Sending AT.."
pause 2000
;serout2 portc.4, 32, ["AT", 13]
serout2 portc.4, 84, ["ATD0599896342", 13] ; mobile dial without any problems

pause 5000
serout2 portc.4, 84, ["AT+CMGF=1", 13]
serin2 portc.5, 84, [b0,b1,b2,b3]
lcdout $FE, 1, b0,b1,b2,b3 ; show strange symbol so nothing recievd


pause 3000
lcdout $FE,1, "Sending command.."
serout2 portc.4, 84, ["at+cgmm", 13]
serin2 portc.5, 84, [b0,b1,b2,b3]
lcdout $FE,1, b0,b1,b2,b3 ; show strange symbol so nothing recievd
pause 5000
;;; str caller\5

goto main
end

I don't know anything about that, but is this possible that the Fbus signal is 3vpp? If so you must have a level converter between your PIC and your Telephone, unless you may have weird results.

Still possible in think to supply the PIC @ 3V. Look the datasheet if it works @3v and 20MHz...

<hr>
EDIT:maybe Fbus is open collector type too?
http://www.panuworld.net/nuukiaworld...les/basics.htm

I try using a converter like that max232 and ds275 but the same problem I can transimit but i can't recieve , I will try to use 3V power if its will working or not ?

try a simple pull up on your PORTC.5 pin.

If you use a MAX or else inverter, you may need to change your baudrate settings to INVERTED mode (16468).

Did you tried with a PC and a MAX232?
http://www.panuworld.net/nuukiaworld...ables/fbus.htm

How can i connect pic with nokia? must I use max232 or Fbus cable?

You cant use max232 on nokia 6210 or same type of nokia!
Level is 2.7V and you must make special cable named DLR3V.
I was make that and it work 100% good.
By the way u must work with nokia6210 on 115kbps not 9600!
Here is part of my code where I send temperature from 3xDS1820 wich is on 3 frigo buildings wich have temperature range from +5C to-20C.

receiving msg***************

citanje: high led
hserout ["AT+CMGF=1",13,10]
pause 2000
low led
hserout ["AT+CMGR=1",13,10]
hserin 5000,nemaSMS,[skip (74),str b1\1]
if b1 = b3 then tmp
low led
goto citanje

sending msg**************

sendSMS: high led
hserout ["ATZ",13,10]
pause 500
hserout ["AT+CMGF=1",13,10]
pause 500
hserout ["AT+CMGD=1",13,10]
pause 500
hserout ["ATZ",13,10]
pause 1000
hserout ["AT+CMGF=1",13,10]
pause 1000
hserout ["AT+CMGS=",34,"+381601302395",34,",129",13,10] ' mine phone if someone need ;-)
Pause 500
hserout ["K1 = ",tempneg1,dec b2a," C ","K2 = ",tempneg2,dec b2b," C ","K3 = ",tempneg3,dec b2c," C",10,13]
hserout [26]
Pause 1000
low led
goto citanje

Regards Robert

Hi,

Ive the same problem to, ive made that cable and others more but no sucess. Can you communicat nokia-pc? (i cant i only can pic-pc or whit the nokia original usb data cable nokia-pc)

Regards