(Note that this answer is no longer working as of Raspbian Jessie, since bluez removed the bluetooth-agent command)
So currently you state that you can connect to the Pi just fine, but require a monitor for the pairing process.
Note: accepting any connection is an incredibly insecure idea, and if you are only using a limited set of devices, setting them up as trusted devices would make a lot more sense as it would limit connection to your Mac addresses but wold not allow for new devices to be added without a monitor
But anyway, the commands that you will need to run to accept all connections being made to the Pi, to make it discoverable and to set a predictable pin are listed below:
Note: you may need to change the zero in hci0 to your devices Bluetooth number.
hciconfig hci0 uphciconfig hci0 sspmode 1hciconfig hci0 piscansudo bluetooth-agent 1234Now after running these commands and seeing if they work as expected we can move on to setting them up to start on the boot of your Pi.
- We start by creating a bash file by running the command
sudo nano mohammadIsAmazing.sh We now enter the following into that file:
#!/bin/shsleep 20hciconfig hci0 uphciconfig hci0 sspmode 1hciconfig hci0 piscansudo bluetooth-agent 1234Now we save and close our file using the
control key and xWe open up the file
/etc/rc.localusing the following command:Sudo nano /etc/rc.localNow we enter the command to run our bash script into
/etc/rc.localsudo /path/to/script/mohammadIsAmazing.sh &Note: you have to put the command before the last line in /etc/rc.local that contains:
exit 0We now save and close that file, then reboot the Pi.
On a side note: be sure to chose a random pin to marginally increase security
On another side note: If you would like to change the bluetooth device name, you need to create a file called /etc/machine-info which should contain the following:
PRETTY_HOSTNAME=device-nameThen run service bluetooth restart after that
