Nokia 3310 F-Bus Adapter

I managed to reset the security code!

As follows:

 1. enable extended commands (0x64 0x01)

1e 00 0c 40 00 06 00 01 64 01 01 41 77 07 

 2. set new code command and the new code is 12345 (see bytes 31 -> 35):

1e 00 0c 40 00 0c 00 01 6f 01 31 32 33 34 35 00 01 46 4b 0c 

 3. disable extended commands (0x64 0x00)

1e 00 0c 40 00 06 00 01 64 00 01 40 77 07

I'll explain the frame later.

Due to lack of a detailed documentation I had to do it by trial and error, after few tries, I was able to run the LCD test via FBus.