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Author SHA1 Message Date
d57a125ec0 fixed description of expected data in comment 2019-08-12 12:22:51 +02:00
b7242359dc deleted old docu folder 2019-08-12 12:21:59 +02:00
13 changed files with 1 additions and 151 deletions

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See: https://github.com/wemos/WEMOS_Motor_Shield_Arduino_Library/issues/1
Possible solution: Reprogram STM32 on the shield:
https://hackaday.io/project/18439-motor-shield-reprogramming
Can be done only with wemos:
https://github.com/thomasfredericks/wemos_motor_shield

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https://hackaday.com/2016/06/14/hackaday-prize-entry-micro-robots-for-education/
https://www.adafruit.com/product/3216
https://www.exp-tech.de/plattformen/robotik/roboterfahrzeuge/7673/adafruit-mini-round-robot-chassis-kit-2wd-with-dc-motors?gclid=EAIaIQobChMIrpHIq4Ke4QIVSeAYCh0LTgdWEAQYCCABEgIQcfD_BwE
https://www.exp-tech.de/plattformen/robotik/roboterfahrzeuge/7898/adafruit-mini-3-layer-round-robot-chassis-kit-2wd-with-dc-motors?gclid=EAIaIQobChMIrpHIq4Ke4QIVSeAYCh0LTgdWEAQYCyABEgI76vD_BwE

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Installing Intel RealSense drivers:
###################################
echo 'deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo xenial main' || sudo tee /etc/apt/sources.list.d/realsense-public.list
sudo add-apt-repository "deb http://realsense-hw-public.s3.amazonaws.com/Debian/apt-repo xenial main"
sudo apt-get update
sudo apt-get install librealsense2-dev
sudo apt-get install librealsense2-dkms # enter a key for installing driver when asked (in my case the pw was realsense2019bt)
sudo apt-get install librealsense2-utils
Check if drivers were installed sucessfully:
modinfo uvcvideo | grep "version:" # -> this should report the realsense camera driver
# Installing the ROS package (assuming ros base is installed):
Install dependencies:
sudo apt-get install ros-kinetic-cv-bridge -y
sudo apt-get install ros-kinetic-image-transport
sudo apt-get install ros-kinetic-tf -y
sudo apt-get install ros-kinetic-diagnostic-updater -y
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
sudo apt-get update
sudo apt-get install ros-kinetic-ddynamic-reconfigure -y
# clone github repo:
git clone https://github.com/IntelRealSense/realsense-ros.git
cd realsense-ros/
git checkout `git tag | sort -V | grep -P "^\d+\.\d+\.\d+" | tail -1`
mkdir -p ~/realsense_catkin_ws/src/realsense
mv * ~/realsense_catkin_ws/src/realsense/
cd ~/realsense_catkin_ws/src/
catkin_init_workspace
cd ..
catkin_make clean
catkin_make -DCATKIN_ENABLE_TESTING=False -DCMAKE_BUILD_TYPE=Release
catkin_make install
echo "source ~/realsense_catkin_ws/devel/setup.bash" >> ~/.bashrc
source ~/.bashrc
Test with:
roslaunch realsense2_camera rs_camera.launch
Possible issue:
The camera requires a USB 3 port to provide full resolution streams

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Creating ros package with catkin and adding custom messages:
############################################################
1. Create a workspace:
----------------------
$ mkdir catkin_ws
$ cd catkin_ws
$ mkdir src
$ catkin_make
$ source devel/setup.bash
2. Create the package:
----------------------
$ cd catkin_ws/src
$ catkin_create_pkg <package_name> std_msgs rospy roscpp
$ cd ..
$ catkin_make # this build the package
3. Create the custom messages:
------------------------------
$ cd catkin_ws/src/<package_name>
$ mkdir msg
$ cd msg
$ echo "int64 num" > Num.msg
Then edit the package.xml file and add the following:
<build_depend>message_generation</build_depend>
<exec_depend>message_runtime</exec_depend>
Also edit CMakeLists.txt and to the find_package() function add:
message_generation
and to the catkin_package() add:
CATKIN_DEPENDS message_runtime
Then, find add_message_files() (uncomment if necessary) and change it to the following:
add_message_files(
FILES
Num.msg
)
Finally, uncomment the generate_messages() function such that it reads:
generate_messages(
DEPENDENCIES
std_msgs
)
To build the new messages do the following:
$ cd catkin_ws
$ catkin_make # builds the new messages
$ catkin_make install
As the last step, source the setup.bash:
$ . install/setup.bash
Now the new messages should be available and you can find them with
$ rosmsg list
Don't forget to source the setup.bash everytime you want to use the messages!

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1. Install ROS (Robot Operating System) (see: http://wiki.ros.org/kinetic/Installation/Ubuntu)
2. Install the following dependencies:
- cv_camera (see: http://wiki.ros.org/cv_camera):
$ sudo apt-get install ros-kinetic-cv-camera
- Aruco Marker detection using fiducials package (see: http://wiki.ros.org/fiducials)
$ sudo apt-get install ros-kinetic-fiducials
-

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Breadboard | NodeMCU, GPIO, index | H-bridge
-------------------------------------
13 | D0, 16, 0 | 15 # driver channel 4 input
14 | D1, 5, 1 | 10 # driver channel 3 input
15 | D2, 4, 2 | 9 # driver 3/4 enable (pwm)
16 | D3, 0, 3 | 2 # driver channel 2 input
17 | D4, 2, 4 | 7 # driver channel 1 input
20 | D5, 14, 5 | 1 # driver 1/2 enable (pwm)
26 | GND
Motor example:
First motor:
GPIO16 -> HIGH (index 0)
GPIO05 -> LOW (index 1)
GPIO04 -> HIGH (index 2)
Second motor:
GPIO00 -> HIGH (index 3)
GPIO02 -> LOW (index 4)
GPIO14 -> HIGH (index 5)

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TODO: Use the following shields
Battery shield: https://wiki.wemos.cc/products:retired:battery_shield_v1.1.0
Motor shield: https://wiki.wemos.cc/products:retired:motor_shield_v1.0.0

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@ -64,7 +64,7 @@ class Robot:
listening = True listening = True
try: try:
while listening: while listening:
# expected data: '(t, u1, u2)'\n" # expected data: '(u1, u2)'\n"
# where ui = control for motor i # where ui = control for motor i
# ui \in [-1.0, 1.0] # ui \in [-1.0, 1.0]
data = comm_socket.readline() data = comm_socket.readline()