Defennder
Newbie level 3
Greetings everyone,
I'm current doing a project where I'd have to interface a Nokia 6230 with a PIC16F877 through an RS232 serial cable, without the aid of a computer. This would be done by sending AT commands through the PIC so that I may read and send SMS messages. I have tested AT commands successfully with the 6230 (using the CA-53 USB cable provided) and have managed to read and send SMS messages in text mode (6230 supports that). Now I've been Googling around and have been reading threads where others have attempted similar projects. And this is what I understand. Please let me know if I've understood it wrongly.
1. The Nokia 6230 has pinouts which are compatible with both USB and Fbus cables. According to this pinout diagram. Hence it should be possible to connect an Fbus cable to the phone whilst ignoring the USB port correct?
2. Does the Fbus cable have some standard communications protocol I must know how to decode before I can interface it with the PIC? This is what I understand from reading threads **broken link removed** on other forums. It seems as though connecting an Fbus cable (which seems to be available **broken link removed** and **broken link removed**) to the phone and treating the other end as a standard RS232 serial port won't work. If so, how do I figure out the protocol?
3. Is it necessary for me to buy the Fbus/RS232 cable? Would it possible to make them using some wires?
4. The pinout diagram above does not show any Mbus support. I have read some threads which say it's possible to send AT commands to the phone on Mbus but not Fbus cables. Is this correct?
5. I heard from my friend that it's not possible to interface the 16F877 using the USB cable because the PIC does not explicitly support USB protocol. Furthermore, even if it does the protocol of USB requires a master controller such as a computer rather than a PIC (since the handphone and PIC is treated as a USB slave). So buying a USB-to-serial converter won't help unless I use a computer as well. Is this correct?
Thank you for your time. I'm currently quite confused as to what to do next.
I'm current doing a project where I'd have to interface a Nokia 6230 with a PIC16F877 through an RS232 serial cable, without the aid of a computer. This would be done by sending AT commands through the PIC so that I may read and send SMS messages. I have tested AT commands successfully with the 6230 (using the CA-53 USB cable provided) and have managed to read and send SMS messages in text mode (6230 supports that). Now I've been Googling around and have been reading threads where others have attempted similar projects. And this is what I understand. Please let me know if I've understood it wrongly.
1. The Nokia 6230 has pinouts which are compatible with both USB and Fbus cables. According to this pinout diagram. Hence it should be possible to connect an Fbus cable to the phone whilst ignoring the USB port correct?
2. Does the Fbus cable have some standard communications protocol I must know how to decode before I can interface it with the PIC? This is what I understand from reading threads **broken link removed** on other forums. It seems as though connecting an Fbus cable (which seems to be available **broken link removed** and **broken link removed**) to the phone and treating the other end as a standard RS232 serial port won't work. If so, how do I figure out the protocol?
3. Is it necessary for me to buy the Fbus/RS232 cable? Would it possible to make them using some wires?
4. The pinout diagram above does not show any Mbus support. I have read some threads which say it's possible to send AT commands to the phone on Mbus but not Fbus cables. Is this correct?
5. I heard from my friend that it's not possible to interface the 16F877 using the USB cable because the PIC does not explicitly support USB protocol. Furthermore, even if it does the protocol of USB requires a master controller such as a computer rather than a PIC (since the handphone and PIC is treated as a USB slave). So buying a USB-to-serial converter won't help unless I use a computer as well. Is this correct?
Thank you for your time. I'm currently quite confused as to what to do next.
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