Hacking Nokia FBUS – calling speed dial numbers

If you want to use a microcontroller to make calls to your speed dial numbers, let’s go with these steps: ( tested with a Nokia 1112)

1. Remember FBUS is 115200bps, 8 bits, no parity, 1 stop bit.
2. The bus RX and TX works with 3V TTL levels, so consider a Low power microcontroller, or if you decide to send from a PC, use a MAX3232 like converter.
3. The following bytes, dial speed number 2, send 3 three times:

1E 00 10 01 00 11 00 01 00 01 01 00 32 05 01 05 00 02 00 00 01 01 44 00 79 13
1E 00 10 D1 00 07 00 01 00 03 00 01 60 00 6E D5

4. The following bytes, dial speed number 3, send 3 three times:

1E 00 10 01 00 11 00 01 00 01 01 00 33 05 01 05 00 02 00 00 01 01 44 00 78 13
1E 00 10 D1 00 07 00 01 00 03 00 01 60 00 6E D5

5. frame to hang-up:

1E 00 0C 01 00 07 00 01 00 08 60 01 60 00 12 0E
1E 00 10 D1 00 07 00 01 00 03 00 01 60 00 6E D5

Well, search google for circuit diagrams for the phone connections.

Please, if you found this usefull for you and works,  send your comments!.

Tips:  you may do a call based on an input alarm at your microcontroller pin.

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