I have a question on PDU..
I'm designing a system that will send sms warning using PIC16f877a.
PIC will trigger nokia 3310 to send sms whenever my sensor detect any danger...
Anyway, i had a good review from internet and forums on MBUS and FBUS...
i plan to use FBUS with 115200 bps speed using direct connection between my PIC and the 3310 fbus line with maybe a voltage divider for 3 volt requirements...
What i dont understand is where does this PDU part come? what it actually is? its quite confusing...
Yep... this is what i plan to do...
let me get this clear... my project have nothing to do with this PDU?
somehow i kept seeing this term in my reference in internet...
Added after 26 minutes:
Hi guys...
i saw in **broken link removed**
To see which modes your mobile supports, you can use the "AT+CMGF=?" command.
You will get a response with the supported SMS formats
0: PDU mode, 1: Text mode
assuming i have direct connection between PIC and nokia 3310 FBUS rx; how do i send the "AT+CMGF=?"?
Can i just send the characters through my pic16f877a serial tx pin at 115200bps?
or i need to convert first to ascii or pdu? :|
ive heard of a group in the philippines that tried to make a braille to sms device, but they used a nokia 6110 i think, made a device connected to the phone's data port and that is the one converting the text message to braille
For sending SMS is better to use a Sonyericcson phones, those works fine without FBUS/MBUS protocol like nokia phones...
It is very simple: using hyperterminal ==> AT<CR>, the phone answer with <CR><LF>OK<CR><LF>....that is very simple for PIC receiving INT_RDA functions type...
Sony use TTL levels for data port.....so you can use a MAX232 to connect a PIC<==>T610 (f.e) using serial datacable, PIN 4 of DB9 must be between +3/+12 volts to enable internal level shifter of data cable...so you can use the second port of MAX232 to set this signal putting TTL input at low level....
hi,terka
i have read that u say we must provide +3/+12v to pin 4 db9 to enable internal level shifter of data cable. Can u pls explain tis and pls send me the schematic as i think my t28 cant send sms using the hardware that i build coz i didnt connect the pin 4 i just use pin2,3,5 of DB9. Pls give some advise for me thanks.