Im trying to connect to nokia phones, 3210 and 6150. The phone won't accept AT commands at all!
After reading a lot, i figured out that phone gets into AT-command mode only after making some command sent on m-bus.
So i found some code for 16f84a that send's something to m-bus every few mseconds and so phone accepts AT commands on f-bus.
What pic sends to the phone? I just want to made it by myself and use only one PIC instead of two for now.
am i right? thanks!