Hi,
I'm struggling with same idea/problem. You are saying "From what I can find out, it seems I can only have one connection at a time. ". How did you find this out?
My problem is this:
raspberry with usb/BT-dongle
arduino mega with HC-05 BT module
arduino micro with HC-05 BT module
I want to connect arduinos to rasp so I that they send data to raspberry simultaneously. I can get them connected one at the time:
*root@raspberrypi:~# bt-device -l *
Added devices:
HCBLU (00:14:01:xx:xx:92)
root@raspberrypi:~# rfcomm -a
rfcomm0: 00:14:01:xx:xx:92 channel 1 clean
This runs a small software, which just echoes everything back and it works ok. When I try to add another arduino:
root@raspberrypi:~# echo "2000" | bt-device -c 00:14:01:xx:xx:89
Connecting to: 00:14:01:xx:xx:89
Agent registered
Device: muovi (00:14:01:xx:xx:89)
Enter PIN code: Agent released
Done
root@raspberrypi:~# bt-device -l
Added devices:
HCBLU (00:14:01:xx:xx:92)
muovi (00:14:01:xx:xx:89)
root@raspberrypi:~# rfcomm bind hci0 00:14:01:xx:xx:89 2
Can't create device: Address already in use
I have both BT's in /etc/bluetooth/rfcomm.conf and can get rfcomm to complete:
root@raspberrypi:~# rfcomm bind all
root@raspberrypi:~# rfcomm -a
rfcomm1: 00:14:01:xx:xx:92 channel 2 clean
rfcomm2: 00:14:01:xx:xx:89 channel 1 clean
but as soon as I try to access them with minicom or screen:
root@raspberrypi:~# minicom
minicom: cannot open /dev/rfcomm1: Connection refused
root@raspberrypi:~# rfcomm -a
rfcomm1: 00:14:01:xx:xx:92 channel 2 closed
rfcomm2: 00:14:01:xx:xx:89 channel 1 clean
So how could we use two at the same time? Any help appreciated!
-Proge