Okay, I'm comparing the image of the SCI adapter and its cables to the markings on these boards.
I see the boards have 1x gnd, 1x txd, 1x rxd, 2x vcc, & 1x at. The schema for the roomba port has an rxd & txd to match that of the boards. But, how would I determine where to put the 2x Vpwr, 1x BRC, and 2x GND from the Roomba onto this? Also, I would be using the regulator mentioned above, so somehow that connects it.
I'm very noobish to this but interested in learning if feasible. My fear is soldering the wrong cables and frying the bot more than anything.
Anyway, so the boards above at $38, regulator at ~$18, PS/2 cable at ~$10, and some form of shell... So, this is around $70 saving $30 so not bad.
BT Board: http://www.aliexpress.com/store/product ... 81727.html
Regulator: http://www.plccenter.com/Shop/MURATA/78 ... nQodwBsAUQ
PS/2 Cable (from mouse): http://www.ebay.com/itm/LOGITECH-OPTICA ... 45ff6149d0
Shell of some sort: unknown at the moment
Where to go from here?