Manually using Bluetooth
|In progress: This article or section documents one or more features whose implementation are in progress.|
Bluetooth is one of the core functions of the Neo1973, however it is basically unimplemented on the software side at the moment. Hardware problems in the P1 phone mean that the CPU has to be active in order to wake on external bluetooth events, which will reduce the battery life to some 2 days at best in standby.
This page details how to use bluetooth from the command line. We have quite a lot of plans about what exactly Bluetooth should be used for.
Power it up
Bluetooth may not be powered up.
Power up the adapter:
root@fic-gta01:~$ echo "1" > /sys/bus/platform/devices/gta01-pm-bt.0/power_on
If that doesn't do it, power up and reset the adapter one after the other:
root@fic-gta01:~$ echo "1" > /sys/bus/platform/devices/gta01-pm-bt.0/power_on ; echo "1" > /sys/bus/platform/devices/gta01-pm-bt.0/reset ; echo "0" > /sys/bus/platform/devices/gta01-pm-bt.0/reset
hciconfig should print information about the adapter if it powered up properly:
(If you have an older rootfs, you may need to modprobe gta01-pm-bt or even hci_usb but these are built in/loaded automatically currently.) The devices should show as UP. If not you can use
hciconfig <device> up
Scanning for bluetooth devices
This will list the addresses of any discoverable bluetooth devices in the vicinity
passkey agent example
There should be a passkey agent built into openmoko, but for now you can start up the example passkey agent and set the pin code there. This will allow for new pairings to be made when you attempt a connection.
passkey-agent --default 0000 &
HID (Human Input Device)
Being able to use HID devices
We want to be able to use a bluetooth keyboard to type into the various applications of our Neo1973. To use a Bluetooth Keyboard type: (11:22:33:44:55:66 is the Address of your BT-Keyboard)
hidd --connect 11:22:33:44:55:66
and press "Connect" on your BT-KB
- Logitech Dinovo Edge
- Nokia SU-8W (Holone). Switched on the BT keyboard, scanned for BT address and ran the connect statement above. Works fine.
Acting as HID device
We want to be able to use the Neo1973 as a HID device, being able to use it as controller for presentations.
Bluetooth should behave just like our usbnet and provide full TCP/IP access to the phone. BNEP has to be used.
On the laptop:
- Start bluetooth
elara /home/alphaone # /etc/init.d/bluetooth start
- Start pand as server
elara /home/alphaone # pand -s
- As soon as pand is started on the phone configure your IP address
elara /home/alphaone # ip a add 10.0.0.1/24 dev bnep0 elara /home/alphaone # ip l set bnep0 up
- Configure IP forwarding and masquerading to your liking
On the phone:
- Power on bluetooth (see above)
- Scan for the laptop
root@fic-gta01:~$ hcitool scan Scanning ... 00:0E:6D:C0:0l:6A Sho 00:20:E0:5A:FE:C8 BlueZ (0)
- Connect to the laptop pand
root@fic-gta01:~$ pand -c 00:20:E0:5A:FE:C8
- Configure your IP address
ip a add 10.0.0.2/24 dev bnep0 ip r add default via 10.0.0.1
root@fic-gta01:~$ wget http://www-public.tu-bs.de:8080/~y0019680/tmp/thereisnophone.mp3 Connecting to www-public.tu-bs.de[126.96.36.199]:8080 thereisnophone.mp3 100****************************************************| 266 KB 00:00:00 ETA root@fic-gta01:~$ madplay thereisnophone.mp3 MPEG Audio Decoder 0.15.2 (beta) - Copyright (C) 2000-2004 Robert Leslie et al. 630 frames decoded (0:00:22.6), -0.9 dB peak amplitude, 0 clipped samples
If you are unable to use the 'BNEP' method described above, you may be able to use a dialup-networking emulation mode. On the Neo:
- Edit the /etc/default/bluetooth file and set the following options:
RFCOMM_ENABLE=true DUND_ENABLE=true DUND_OPTIONS="--listen --persist call dun"
- Create an /etc/ppp/peers/dun file with options like the following:
115200 192.168.2.202:192.168.2.200 passive local noipdefault noauth nodefaultroute
- Restart bluetooth (/etc/init.d/bluetooth stop ; /etc/init.d/bluetooth start)
To connect from a MacOS 10.3 client:
- Open "Applications/Utilities/Bluetooth Serial Utility"
- Click on "New"
- Choose a name, then click "Choose Device"
- Locate your Neo, then select the "LAN Access Point" service. If your device is not found, or if this service does not show up, then you will need to troubleshoot and fix that before continuing. Bluetooth is designed for short-range communication, so make sure that the devices are physically close to each other.
- Select "Port type: RS-232" and "Show in Network Preferences". Click OK.
- Open the Network Preferences page then "Show: Network Port Configurations". Enable the new device that you defined in the previous step and drag it to the bottom of the device list (so that it will not interfere with your other network connections)
- Choose "Show: <your-device-name>", then click "Modem"
- Select "Null Modem 115200" from the list of available devices. Uncheck "Wait for dial tone" and "Enable error correction and compression in modem". Optionally check "Show modem status in menu bar".
- Click "Connect". If everything worked, you will end up with a 'ppp0' device on your Mac with a local address of 192.168.2.200 and you will be able to access your Neo at 192.168.2.202.
The A2DP codec, SBC, runs pretty well now in 32-bit fixed-point math. It's been successfully tested on a faster ARM but not yet on neo. There is test code in the bluetooth-alsa.sf.net plugz module for using alsa plugins to send A2DP audio out and it's starting to be reimplemented "properly" in the bluez core.
Bluez has an audio daemon for headset audio that should work to set up the control connection to the headset. It will need hooks in the openmoko gui.
Neo1973_Audio_Subsystem has more detail about what magic needs to happen with the Wolfson codec so system audio can be switched to use the bluetooth audio channel and later back to the speaker/earpiece/wired headset.
There seems to be a proposal for audio scenario management there but no detail about whether that is how things are done currently. How should audio management work when eg plugging in/unplugging the wired headset?