Robobot
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This section contains instructions for setting up a clean Raspberry Pi very manually. | This section contains instructions for setting up a clean Raspberry Pi very manually. | ||
Revision as of 13:52, 2 February 2023
This page is for ROBOBOT, an extension of REGBOT with a raspberry pi and three wheels.
Figure 1. Robobot, The robot is a 3D-printed box with wheels and some electronics. The third, fourth and fifth generations are shown here. The 3D printed parts can be found here https://cad.onshape.com/documents/fef8699fcafb8aea780c8981/w/ce38e7fdd6cf8533b65e2c3c/e/4792e876b254f8e35059f863
Contents |
Overview
hardware
ROBOBOT is based on a navigation box with a line sensor (Edge sensor), an IR distance sensor and possibly some servos, all controlled by a microprocessor. For more intelligent behaviour and more sensors, there is a Raspberry Pi in the box too,
The motors are JGB37-545 with an encoder and a 1:10 gearing (up to about 400RPM (or ~6 RPS (rotations per second) on the output axle).
There is a video introduction and demo here https://www.youtube.com/watch?v=6dNr_F0dsHw (from 2022 - slight changes since)
Figure 2. ROBOBOT is an extension of the robot REGBOT. The REGBOT part controls the wheels and interfaces to the sensors, like an IMU (6-axis accelerometer and gyro), IR distance sensors (2), and a line edge detector. The REGBOT further controls up to 5 servos and controls the battery supply. ROBOBOT is further equipped with a Raspberry Pi to allow more complicated missions. The Raspberry Pi runs an interface process called "Bridge" and is the main interface to the REGBOT. The mission process collects data from the bridge and the REGBOT and supplies small mission code snippets to be executed by the REGBOT part. The mission process may use the camera and the Open-CV library functions. The speaker allows debugging messages or other sound effects.
The ROBOBOT functions are available on the net at port number 24001. The existing user interface for REGBOT can access REGBOT functions from this port.
The gamepad can take control of the robot if the mission fails and can be used to initiate missions or other functions.
Software description
Bridge software
The Robobot bridge runs on the Raspberry Pi and is started when the Raspberry Pi starts, with initial commands from an initialization file (bridge.ini).
Robobot_bridge overview
A bridge autostart feature is implemented in the script 'start_bridge.sh' in the home directory of the user 'local'. The is executed after a reboot.
The script can be amended with other commands that should be started after a reboot.
Mission software
The mission application is the primary user control for the robot.
Robobot mission application overview.
The Mission application is started manually from an ssh console or added to the reboot script 'start_bridge.sh'.
Setup issues
Installation instructions
This installation should be done already, to update see next section.
Raspberry and ROS (not finished)
Network setup (Wifi)
Robobot camera camera setup
Access from Windows and Linux to Raspberry files (and graphics)
Regbot GUI python setup and GUI install
See Regbot calibration for sensor calibration.
Software update
Update of the maintained software is on the SVN (subversion) repository.
SSH to the robot and go to these directories and do an update
cd svn up svn/fejemis/ROS/catkin_ws/src/bridge svn up svn/robobot svn up svn/regbot
An update could look like this
$ svn up svn/fejemis/ROS/catkin_ws/src/bridge Updating 'svn/fejemis/ROS/catkin_ws/src/bridge': U fejemis/ROS/catkin_ws/src/bridge/udataitem.h U fejemis/ROS/catkin_ws/src/bridge/ujoy.cpp Updated to revision 228.
NB! this may cause a conflict if some of the files are changed locally. Look at the filename and if it is not one of yours, then reply 'tc' (short for their conflict solution)
Compile on bridge changes
If there are updated files for the bridge, then
cd cd catkin_ws catkin_make
Compile and upload on Teensy changes
cd cd svn/regbot/regbot/4.1 make -j3
Uploading to Teensy requires that the "power" button on the Regbot board is pressed while the upload is in progress (else the full system powers down). The first upload will start the Teensy loader. The Teensy loader uses graphic and thus require that the client understand 'X'. The first upload may fail (it takes too long time to load), so try again, keeping the 'power' button pressed.
make upload
If power down occurs during the upload, then hold the power button, wait for the raspberry to boot, and run the upload again. If it fails, then press the small button on the Teensy board.
old instructions
Partially valid only.
This section contains instructions for setting up a clean Raspberry Pi very manually.
Install on raspberry on a clean SD-card - raspi-config.
Setup user local adding a new user.
Linux tools - packages to install.
Access from PC (Linux or Windows).
Other windows tools - run graphics from Windows
Instructions for getting started - primarily network, Linux intro and wifi setup.
REGBOT setup
Several parameters in the REGBOT part of the robot need setting.
Some suggestions are provided here using the REGBOT GUI (available on the raspberry in the 'regbotgui' directory, and in a Windows version):
Hardware
The Robobot frame is 3D printed, the design is in onshape - see this link https://cad.onshape.com/documents/fef8699fcafb8aea780c8981/w/ce38e7fdd6cf8533b65e2c3c/e/4792e876b254f8e35059f863 , in the list of parts to the left it is possible to export (right-click) as STL files, that you can slice for your 3D printer.
There are video-instructions on the course page.
