The HC05 has spare I/O pins that can be controlled by AT commands.
I guess that's not going to be suitable for time-sensitive communications, but it should be far enough to read on/off sensor data or control a relay for example.
So, I was wondering if there were a board available where to solder the HC05, including connections for its spare I/O pins?
Ideally, this PCB would have a few transistors on the out pins to safely drive a relay, and some protection circuitry for inputs. Even further, this PCB could have a DIP socket to connect the HC05 directly to a 8-pin ATTiny85 (using 2 I/O for BT RX/TX, one pin to set HC05 in AT mode, possibly one pin to read the HC05 status line). This leaves only 2 I/O pins free for use on the Attiny, hence the added value of the HC05 extra I/O... Some kind of a Olimexino with HC05, if you will.
So that could be a nice internet-of-things board (connecting Attiny sensor/actuator through HC05 to Raspi for example)
Does such a beast exist?
So far, the closest I could find is mentionned for a Freedom board (http://mcuoneclipse.com/2013/02/14/bluetooth-with-the-freedom-board/) although the board depicted in that nice article is not generic. Full AT commands details are in http://forum.arduino.cc/index.php?PHPSESSID=np64rahp5jiallllbvqpqua3r7&action=dlattach;topic=176295.0;attach=48211, mentionned by this post: http://forum.arduino.cc/index.php?topic=176295.msg1309702#msg1309702
Thanks in advance for any pointers or just thoughts on that,