[plz]8051 + cell phone

wcgan · Dec 14, 2006

there is a bad news, our nokia 8250 was spoil, so we decide to use nokia 2300.
we already found out the data sheet for nokia 2300.
https://pinouts.ru/CellularPhones-Nokia/nokia_1100_pinout.shtml
we had modified the circuit, as the following picture. is that any mistake we make?
thank for ur help.

budhy · Dec 14, 2006

is that any mistake we make?

Yes, the circuit is correct!

wcgan · Dec 14, 2006

budhy said:
is that any mistake we make?

Click to expand...

Yes, the circuit is correct!

the others pins (1,4,6) can ignore?
thanks a lot... i will try to connect wit my 8051..

ashad · Dec 16, 2006

hi,

i used the C55 seimens it is AT command compatible easy to interface. only connect this mobile with first hypertrm, and test all the commands then after testing this mobile you can easily interface with 8o51 type controller but u have to convert the serial data in to RS232 then interfac with mobile

wcgan · Dec 17, 2006

i am wrote a 8051 program already, but my phone cant function...
so i try to test my cell phone wit computer first..
interface like this...

i am using serial port - com2..
and hyper terminal..
but... when i type "AT" to cell phone.. it wont reply "OK"..
is my circuit problem or not?

budhy · Dec 17, 2006

Your circuit seem OK. Do You have Data Cable for 2300, it is better to test the phone with original data cable before you build your own circuit.

kishorekhatri · Dec 17, 2006

i need complete set of AT-commands for Nokia

budhy · Dec 18, 2006

kishorekhatri wrote

i need complete set of AT-commands for Nokia

You have it here AT_Command_Set_For_Nokia_GSM_And_WCDMA_Products_v1_2_en.pdf

wcgan · Dec 18, 2006

budhy said:
Your circuit seem OK. Do You have Data Cable for 2300, it is better to test the phone with original data cable before you build your own circuit.

i went many mobile shop already, but dun have..

budhy · Dec 18, 2006

Try this :

wcgan · Dec 19, 2006

sorry..
i am confusing now..
dun know is 8051 program problem or my cell phone connection problem..
i dun know how to check it now...
i am connect cell phone nokia 2300 to pc.. using hyper terminal to test the AT command, but the cell phone no reply...
can anyone give me suggestion or any solution?
or write a simple 8051 program, about delete a msg from cell phone
AT+CMGD=1
thanks a lot.

budhy · Dec 19, 2006

Test it with the most simple command : AT
Cell phone will answer OK if the connection is good

Try difference baud rate, and recheck HyperTerminal COM port setup

wcgan · Dec 19, 2006

budhy said:
Test it with the most simple command : AT
Cell phone will answer OK if the connection is good

Try difference baud rate, and recheck HyperTerminal COM port setup

that's means if i connect like this circuit..

i am can use hyper terminal to test...
if i cant get "OK" from hyper terminal, that means my connection got problem
so i can go futher to 8051 part rite?

budhy · Dec 20, 2006

Fix the connection first, after that go further with uC

wcgan · Dec 20, 2006

i bought a cable already...
but the problem is... not serial port, is RJ-45
how can i connect to pc?
can i just connect TX,RX,GND to serial port TX,RX,GND.
no need change voltage or still need change voltage?
those cable with serial port was already converted voltage or wat?
y can directly connect to serial port.?
thanks ...

those serial port cable already changed voltage? phone not operate on 3.3v?
serial port is +12 and -12v rite?

budhy · Dec 20, 2006

I know nothing about your RJ45 cable, may I have more specific technical information, or the type (name) of that cable?

The third photo look like a RS232 serial cable, plug it to PC COM port and measure the voltage at the phone connector side. At idle state the RX line is 3 Volt, but Tx line un-measureable (floating).

wcgan · Dec 20, 2006

budhy said:
the type (name) of that cable?

they called this cable "NK1110" or "AT133"

budhy said:
The third photo look like a RS232 serial cable, plug it to PC COM port and measure the voltage at the phone connector side. At idle state the RX line is 3 Volt, but Tx line un-measureable (floating).

the picture of serial port cable is copy from internet, because i want to ask, it without extra circuit, is that converted voltage already?
u said that before cellphone is 3.3v, but if direct connect to serial, serial port is +-12v, i cant understand this...
thanks/..

budhy · Dec 20, 2006

that serial port cable copy from internet, it without extra circuit, is that converted voltage already?
u said that before cellphone is 3.3v, but if direct connect to serial, serial port is +-12v, i cant understand this...

There a 3.3 Volt to RS232 Voltage level converter inside the special DB9 connector!

Just plug the DB9 connector to COM port, and mesure the voltage on the Cell Phone connector side!

wcgan · Dec 21, 2006

budhy said:
that serial port cable copy from internet, it without extra circuit, is that converted voltage already?
u said that before cellphone is 3.3v, but if direct connect to serial, serial port is +-12v, i cant understand this...

Click to expand...

There a 3.3 Volt to RS232 Voltage level converter inside the special DB9 connector!

Just plug the DB9 connector to COM port, and mesure the voltage on the Cell Phone connector side!

sorry about that, make trouble to u..
thanks a lot .

wcgan · Dec 22, 2006

this is my program, just wan delete a msg from hp..
my program got any wrong or not?
i link to my cell phone, cant work..
thanks.
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[plz]8051 + cell phone

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