The default controller to drive the car with your phone or browser. This has a web live preview of camera. Control options include:
- A virtual joystick
- The tilt, when using a mobile device with supported accelerometer
- A physical joystick using the web adapter. Support varies per browser, OS, and joystick combination.
- Keyboard input via the 'ikjl' keys.
Note: Recently iOS has disabled default Safari access to motion control.
If you bought an RC car then it might have come with a standard 2.4GHz car radio and receiver as shown in picture below. This can be used to drive the car.
You can also use the RaspberryPi pins to output directly to the car's servo and motor controller, without the need for an I2C servo driver board. A full tutorial on doing this is here.
Many people find it easier to control the car using a game controller. There are several parts that provide this option.
The default web controller may be replaced with a one line change to use a physical joystick part for input. This uses the OS device /dev/input/js0 by default. In theory, any joystick device that the OS mounts like this can be used. In practice, the behavior will change depending on the model of joystick ( Sony, or knockoff ), or XBox controller and the Bluetooth driver used to support it. The default code has been written and tested with a Sony brand PS3 Sixaxis controller. Other controllers may work, but will require alternative Bluetooth installs, and tweaks to the software for correct axis and buttons.
These joysticks are known to work:
- Logitech Gamepad F710
- Sony PS3 Sixaxis OEM (Not compatible with Jetson Nano)
- Sony PS4 Dualshock OEM
- WiiU Pro
- XBox Controller
- SteelSeries Nimbus (works only on TX2 jetpack 4.2+, may work on the Nano)
These can be enabled by finding the CONTROLLER_TYPE in your myconfig.py and setting it to the correct string identifier ( after disabling the comment ).
These can be used plugged in with a USB cable. It's been much more convenient to setup Bluetooth for a wireless control.
There are controller specific setup details below.
Note: If you have a controller that is not listed below, or you are having troubles getting your controller to work or you want to map your controller differently, see Creating a New or Custom Game Controller.
Change myconfig.py or run with --js
python manage.py drive --js
Will enable driving with the joystick. This disables the live preview of the camera and the web page features. If you modify myconfig.py to make
USE_JOYSTICK_AS_DEFAULT = True, then you do not need to run with the
Follow this guide. You can ignore steps past the 'Accessing the SixAxis from Python' section. I will include steps here in case the link becomes stale.
sudo apt-get install bluetooth libbluetooth3 libusb-dev sudo systemctl enable bluetooth.service sudo usermod -G bluetooth -a pi
Reboot after changing the user group.
Plug in the PS3 with USB cable. Hit center PS logo button. Get and build the command line pairing tool. Run it:
wget http://www.pabr.org/sixlinux/sixpair.c gcc -o sixpair sixpair.c -lusb sudo ./sixpair
Use bluetoothctl to pair
bluetoothctl agent on devices trust <MAC ADDRESS> default-agent quit
Unplug USB cable. Hit center PS logo button.
To test that the Bluetooth PS3 remote is working, verify that
In case the BT connection on the Raspberry Pi does not work, you see might something like this in
[NEW] Controller 00:11:22:33:44:55 super-donkey [default] [NEW] Device AA:BB:CC:DD:EE:FF PLAYSTATION(R)3 Controller [CHG] Device AA:BB:CC:DD:EE:FF Connected: yes [CHG] Device AA:BB:CC:DD:EE:FF Connected: no [CHG] Device AA:BB:CC:DD:EE:FF Connected: yes [CHG] Device AA:BB:CC:DD:EE:FF Connected: no [CHG] Device AA:BB:CC:DD:EE:FF Connected: yes ... [CHG] Device AA:BB:CC:DD:EE:FF Connected: yes [CHG] Device AA:BB:CC:DD:EE:FF Connected: no [bluetooth]#
Try updating the Linux kernel and firmware by running:
And then reboot:
Charging PS3 Sixaxis Joystick
For some reason, they don't like to charge in a powered USB port that doesn't have an active Bluetooth control and OS driver. This means a phone type USB charger will not work. Try a powered Linux or mac laptop USB port. You should see the lights blink after plugging in and hitting center PS logo.
After charging, you will need to plug-in the controller again to the Pi, hit the PS logo, then unplug to pair again.
New Battery for PS3 Sixaxis Joystick
Sometimes these controllers can be quite old. Here's a link to a new battery. Be careful when taking off the cover. Remove 5 screws. There's a tab on the top half between the hand grips. You'll want to split/open it from the front and try pulling the bottom forward as you do, or you'll break the tab off as I did.
PS3 Mouse problems on Linux
Sometimes when you plug-in the PS3 joystick it starts taking over your mouse. If you want to prevent that, you can run this:
xinput set-prop "Sony PLAYSTATION(R)3 Controller" "Device Enabled" 0
Running on your pi over ssh, you can directly install it:
sudo /home/pi/env/bin/pip install ds4drv
Grant permission to
sudo wget https://raw.githubusercontent.com/chrippa/ds4drv/master/udev/50-ds4drv.rules -O /etc/udev/rules.d/50-ds4drv.rules sudo udevadm control --reload-rules sudo udevadm trigger
ds4drv --hidraw --led 00ff00
If you see
Failed to create input device: "/dev/uinput" cannot be opened for writing, reboot and retry. Probably granting permission step doesn't take effect until rebooting.
Some controllers don't work with
--hidraw. If that's the case try the command without it.
--led 00ff00 changes the light bar color, it's optional.
Start controller in pairing mode
Press and hold Share button, then press and hold PS button until the light bar starts blinking. If it goes green after a few seconds, pairing is successful.
ds4drv in background on startup once booted
sudo nano /etc/rc.local
/home/pi/env/bin/ds4drv --led 00ff00
Save and exit. Again, with or without
--hidraw, depending on the particular controller you are using.
To disconnect, kill the process
ds4drv and hold PS for 10 seconds to power off the controller.
XBox One Controller
This code presumes the built-in linux driver for 'Xbox Wireless Controller'; this is pre-installed on Raspbian, so there is no need to install any other drivers. This will generally show up on /dev/input/js0. There is another userland driver called xboxdrv; this code has not been tested with that driver.
The XBox One controller requires that the bluetooth disable_ertm parameter be set to true; to do this:
- edit the file
/etc/modprobe.d/xbox_bt.conf(that may create the file; it is commonly not there by default)
- add the line:
options bluetooth disable_ertm=1
- reboot so that this takes affect.
- after reboot you can verify that
disable_ertmis set to true entering this command in a terminal:
- the result should print 'Y'. If not, make sure the above steps have been done correctly.
Once that is done, you can pair your controller to your Raspberry Pi using the bluetooth tool. Enter the following command into a bash shell prompt:
That will start blue tooth pairing in interactive mode. The remaining commands will be entered in that interactive session. Enter the following commands:
agent on default-agent scan on
That last command will start the Raspberry Pi scanning for new bluetooth devices. At this point, turn on your XBox One controller using the big round 'X' button on top, then start the pairing mode by pressing the 'sync' button on the front of the controller. Within a few minutes, you should see the controller show up in the output something like this;
[NEW] Device B8:27:EB:A4:59:08 XBox One Wireless Controller
Write down the MAC address, you will need it for the following steps. Enter this command to pair with your controller:
YOUR_MAC_ADDRESS is the MAC address you copied previously. If it does not connect on the first try, try again. It can take a few tries. If your controller connects, but then immediately disconnects, your disable_ertm setting might be wrong (see above).
Once your controller is connected, the big round 'X' button on the top of your controller should be solid white. Enter the following commands to finish:
trust YOUR_MAC_ADDRESS quit
Now that your controller is trusted, it should automatically connect with your Raspberry Pi when they are both turned on. If your controller fails to connect, run the bluetoothctl steps again to reconnect.
Creating a New or Custom Game Controller
To discover or modify the button and axis mappings for your controller, you can use the Joystick Wizard. The Joystick Wizard will write a custom controller named 'my_joystick.py' to your mycar folder. To use the custom controller, set
CONTROLLER_TYPE="custom" in your myconfig.py.