For FireCracker protocol information, try the following...

http://www.x10.com/manuals/cm17a_proto.txt

It looks like the interface uses control signals only, which might help
explain why it works as an RS-232 'pass through' device. And the protocol
is not time sensitive, making it simpler to interace to a PIC.

>I need to know what serial
>commands to send to it and the pin-out of the DB-9 to see what signals it
>uses. Can anyone point me to the data format or `FireCracker Hacks'? Thanks,
>
>   - Tom

---
Markku VenŠlŠinen
markkuv@uniserve.com