The new Raspberry Pi 3 comes with Wifi and Bluetooth chip, but my v2 does not. I do have a bluetooth dongle and I wonder if the new Raspbian OS already included the bluetooth driver so I don’t have to install it myself. So I reinstall the OS and YES! It already has bluetooth commands and can detect my bluetooth dongle! Cool!
root@raspberrypi:~# hciconfig hci0: Type: BR/EDR Bus: USB BD Address: 00:1B:DC:06:C1:18 ACL MTU: 310:10 SCO MTU: 64:8 UP RUNNING RX bytes:610 acl:0 sco:0 events:36 errors:0 TX bytes:942 acl:0 sco:0 commands:36 errors:0
root@raspberrypi:~# hcitool scan Scanning ... 34:C7:31:AB:27:F5 FHMLAPYAMADAT 34:C7:31:AB:64:A2 KURODATCALT
Bluetooth works but I found it can pair, trust, but cannot connect. What good with bluetooth module when it cannot connect to anything? I found by editing /etc/systemd/system/bluetooth.target.wants/bluetooth.service file fix the connect issue. Here is how:
change the line
Save and then restart the Raspberry Pi
Connect two Raspberry Pis with Bluetooth
On one of the Raspberry Pi, make its bluetooth discoverable by doing
hciconfig hci0 piscan
Once this command is entered, hciconfig will show hci0 has
UP RUNNING PSCAN ISCAN
instead of just
UP RUNNING PSCAN
On the other Raspberry Pi, the hcitool scan command will see Raspberry Pi 1 now.