This is just a quickie to provide a way to connect to a Bluetooth module for Russ’ chording keyboard. I found a datasheet and an Eagle lib with the footprint. Unfortunately the pads didn’t provide enough area outside the “half via” connections at the edge of the module to solder them by hand. Fortunately, I’ve made enough peace with Eagle that it wasn’t hard to hack the footprint (adding a new package variant) with some top layer rectangles to extend the pads a little.
To use the module on a breadboard, it made sense to break all the interesting leads out to a 0.1″ male header on one side – leaving the board and module hanging out in space over the side of the breadboard. The pins should provide enough mechanical support for breadboard use. I considered adding names next to each pin, but that would have extended the board enough to cover many breadboard holes.
I think I got all the important leads, but here’s the pinout for the record. I also (think I) brought out all the JTAG leads to little pads so in the unlikely event of need for such debugging there’s at least a little something to solder to.
I hope it works out!
I would have moved the lettering somewhere else, it is right next to the antenna.
Thanks for posting your code and weehatr station project. Any suggestions on how to get a TX7U to work with a 433mhz receiver on an Arduino? Any code change suggestions or pointers about the differences in the data format would help. Thanks.
Hi Lizzie,
Not quite sure what you’re asking about. This post is about a bluetooth breakout PCB – has nothing to do with weather.
Jim