Keywish Hummer-Bot-2.0 User manual

Hummer-Bot-2.0
Instruction Manual
V.2.3
Github https://github.com/keywish/keywish-hummer-bot-v2.0

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Revised Version Of History
Date
Version
Description
Author
2017/9/16
V.1.0
Create
Baron.li
2017/9/23
V.1.1
modify
Ken.chen
2017/10/18
V.1.2
Review
Ken.chen
2017/11/15
V.1.3
Review
Zach.zhou
2017/12/8
V.1.4
Review
Baron.li
2018/3/11
V.1.5
Modifyir/blutooth module
Ken.chen
2018/4/20
V.1.6
Add device instructions
Baron.li
2018/5/3
V.1.7
Add installation details picture
Baron.li
2018/7/1
V.1.8
Update component list
Ken.chen
2019/1/3
V.1.9
Update component list
Abbott.chen
2019/1/15
V.2.0
Modify installation of steering servo
Carl,du
2019/1/30
V.2.1
Supplementary steering gear installation
Abbott.chen
2019/2/14
V.2.2
Change the demo code
Abbott.chen
2019/4/15
V.2.3
Modify L298N wiring picture
Carl.du

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Table Of Contents
Chapter1 Introduction........................................................................................................................................1
1.1 Writing Purpose...................................................................................................................................1
1.2 Product Introduction ............................................................................................................................1
Chapter2 Preparations........................................................................................................................................3
About Arduino uno r3................................................................................................................................3
2.1 Development environment Arduino IDE.............................................................................................4
2.1.1 Install the IDE...........................................................................................................................4
Chapter3 Experiments......................................................................................................................................13
3.1 Assembly of the Car...........................................................................................................................13
3.1.1 Motor installation....................................................................................................................13
3.1.2 Wheel and drive module installation ......................................................................................16
3.1.3 Tracking module installation ..................................................................................................18
3.1.4 Lower acrylic plate copper column installation and motor wiring.........................................20
3.1.5 Keywish Uno R3 board installation.......................................................................................22
3.1.6 Battery box installation...........................................................................................................23
3.1.7 Servo installation ....................................................................................................................24
3.1.8 Infrared obstacle avoidance module installation.....................................................................28
3.1.9 Voltage display module and DC head installation..................................................................29
3.1.10 Infrared remote control receiver installation.........................................................................32
3.1.11 Overall assembly...................................................................................................................33
3.1.12 Bluetooth module installation...............................................................................................35
3.1.13 Expansion board wiring diagram..........................................................................................35
3.2 Hummer Bot Module experiment......................................................................................................38
3.2.1 Walking Principle of the Car ..................................................................................................38
3.2.2 Infrared Obstacle Avoidance ..................................................................................................46
3.2.3 Infrared Tracing......................................................................................................................53
3.2.4 Ultrasonic Obstacle Avoidance...............................................................................................62
3.2.5 Infrared Remote Control.........................................................................................................73
3.2.6 Mobile Phone Bluetooth Control............................................................................................81
3.2.7 PS2 Handle (Optional)............................................................................................................96

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Chapter1 Introduction
1.1 Writing Purpose
The purpose of this manual is to create a fast, practical and convenient development learning platform
for the vast number of electronic enthusiasts and let them grasp the Arduino and its extended system design
methods and design principles, as well as the corresponding hardware debugging methods.
This manual will lead you to learn every function of "Hummer-Bot" step by step and open a new
"Hummer-Bot" journey for you. It is divided into two parts:
1, Preparation chapter, which mainly introduces the use of common Arduino development software
and some downloading and debugging skills.
2, Experiment chapter, which contains hardware and software, the former mainly introduces the
function and principle of each module; the latter mainly introduces each part of the program and leads you to
understand and grasp the principle of Arduino and the car development through written examples step by
step.
This manual is a specifications for "Hummer-Bot" , the file whose format is PDF which is in the CD
along with our product requires the corresponding software to open. It contains detailed schematic diagrams
and complete source codes for all instances, the codes won't have any mistake under our strict test. In
addition, the library files used in the source codes are put into the corresponding path, you only need to see
corresponding phenomenon of the car and personally experience the process of experiment by downloading
the source codes to Arduino via the serial port emulator.
This manual is very suitable for students and electronic enthusiasts to learn, all course videos will be
synchronized to https://github.com/keywish/keywish-hummer-bot-v2.0 ，please real-time synchronization
of the latest information
1.2 Product Introduction
"Hummer-Bot" is a multifunctional car based on the Arduino UNO and L298N motor. Compared with
the traditional car, "Hummer-Bot" is also equipped with wireless control (Bluetooth, infrared, WIFI and so
on); ultrasonic; infrared. It can trace and avoid obstacles automatically, of course, makers can also
automatically control the car with wireless and make full use of each module, as well as integrate all kinds
of related sensors to make the car more intelligent, which is more challenging. "Hummer-Bot" has various
types of information, technical manuals, routines, etc., which can teach you step by step. Each electronic fan
can use it easily to achieve their desired function.
Product Features
◆Three groups of black line infrared tracing module
◆Two groups of infrared obstacle avoidance module

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◆Ultrasonic obstacle avoidance
◆Four DC motor drive
◆Two 3000mZh, 3.7V rechargeable lithium battery with longer endurance
◆Remaining capacity of battery real-time detection
◆Infrared remote control
◆Bluetooth app control
◆PS2 handle control (optional)
Product Device List

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Chapter2 Preparations
About Arduino uno r3
◆In "Aurora-Racing", we used the Arduino uno r3 as the main control board, which has 14 digital
input/output pins (6 of which can be used as PWM output), 6 analog inputs, and a 16 MHz ceramic
resonator, 1 USB connection, 1 power socket, 1 ICSP head and 1 reset button. It contains everything
that supports the microcontroller; You just need to connect it to a computer via a USB cable or start
with an AC-DC adapter or battery.
Technical specifications:
Working voltage: 5V
Input voltage: USB powered or external 7V~12V DC input
Output voltage: 5V DC output and 3.3V DC output and external power input
Microprocessor: ATmega328 (Chip data sheet is in the documentation)
Bootloader：Arduino Uno
Clock frequency: 16 MHz
Support USB interface protocol and power supply (without external power supply)
Support ISP download function
Digital I/O port: 14 (4 PWM output ports)
Analog input port: 6
DC Current I/O Port: 40mA
DC Current 3.3V Port: 50mA
Flash memory: 32 KB (ATmega328) (0.5 KB for bootloader)
SRAM ：2 KB (ATmega328)
EEPROM：1 KB (ATmega328)
Size：75x55x15mm

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2.1 Development environment Arduino IDE
2.1.1 Install the IDE
AduinoIDE is an open source software and hardware tool written by open source software such as Java,
Processing, and avr-gcc. It is an integrated development environment that runs on a computer. It can write
and transfer programs to the board. The major feature of the IDE is cross-platform compatibility for
Windows, MaxOSX, and Linux. Only a simple code base is needed, and the creators can create personalized
home internet solutions through the platform, such as remote home monitoring and constant temperature
control and so on.
In this tutorial, we use the version is 1.6.0, download address
is:https://www.arduino.cc/en/Main/OldSoftwareReleases#previous，After opening the link, we can see the
interface as shown in Figure 2.1.1. In this interface, we can see the different versions of the IDE and
different operating environments. Everyone can download according to their own computer system, of
course, There will be a downloaded installation package on our companion CD, but only the Windows
version, because this tutorial is all running under Windows system.
Figure 2.1.1 ArduinoIDE download interface
After the downloading, we will get a compressed package as shown in Figure 2.1.2. The compressed
package will be decompressed. After decompression, the files in Figure 2.1.3 are extracted. The “drivers” is
the driver software. When the “Arduino.exe” is installed, it will be Install the driver automatically. Because
the installation of "arduino.exe" is very simple, it will not be explained here. It is recommended to exit the
anti-virus software during the installation process, otherwise it may affect the installation of the IDE. After

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the installation is complete, click "arduino.exe" again to enter the IDE programming interface.
Figure 2.1.2 Arduino IDE Installation Package
Figure 2.1.3 Extracted files
When finish the installation of the IDE，connect to the Arduino motherboard，click“My Computer”
→“Properties”→“Device Manager”→“Viewing Ports (COM and LTP)”，If you can see as the
Figure 2.1.4
Figure 2.1.4 Driver installation success interface
that indicates the driver has been installed successfully，At this time we open the IDE, select the
corresponding development board model and port in the toolbar to use normally. If you see Figure 2.1.5, it
means that the computer does not recognize the development board and you need to install the driver
yourself.

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Figure 2.1.5 Driver is not successfully installed interface
Notice:
1）If you connect the controller board to the computer, the computer does not respond. Right-click "My
Computer" and select Open Device Manager then find viewing port (com & lpt). If there is no com or lpt, or
only an unknown device, there is a problem with the controller board or the USB cable.
2）Right-click "My Computer" and select Device Manager, find the viewing ports (COM and LPT). If there
is a yellow Arduino UNO exclamation point, this means you need to install the driver yourself.
3）If you install the driver again and again, it eventually fails. Please uninstall the driver and re-install>
install the driver automatically> restart the computer.
2.1.2 Install Driver
If your computer is a Windows 7 system
1）Right-click on "My Computer" and open the Device Manager, find viewing the ports (COM and LPT).
At this point you will see a "USB Serial Port", right-click "USB Serial Port" and select the "Update Driver
Software" option.

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Figure 2.1.6 Updated Driver Interface
2）Next, select the "Browse my computer for driver software" option.
Figure 2.1.7 Driver Update Selection Screen

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3）Finally select the driver file named "FTDI USB Drivers" located in the "Drivers" folder of the Arduino
software download.
Figure 2.1.8 Driver file selection interface
4）If you have already installed, the following figure will automatically inform you that the driver was
successful.

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Figure 2.1.9 Driver Installation Successful Interface
At this time, we return to the "Device Manager" interface, the computer has successfully identified Arduino,
as shown in the below Figure 2.1.10 .then open the Arduino compilation environment, you can open the
Arduino trip.
Figure 2.1.10 Driver Success Recognition Interface

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Notice In Win10 system, some Arduino are connected to the computer (non-genuine chips are difficult to
identify), the system will automatically download the corresponding driver, so you can not install the driver
yourself, but in the Win7 system, you have to do it yourself.
In addition, we can see that the USB serial port is identified as COM15 in the above figure, but it may
be different with different computer, you may be COM4, COM5, etc., but USB-SERIAL CH340, this must
be the same. If you do not find the USB serial port, you may have installed it incorrectly or the system is
incompatible.
2、If your computer is a Windows 8 system: Before installing the driver, you should save the files you are
editing because there will be several shutdowns during the operation.
1）Press "Windows key" + "R"
2）Iput shutdown.exe / r / o / f / t 00
3）Click the "OK" button.
4）The system will reboot to the "Select an option" screen
5）Select "Troubleshooting" from the "Select an option" screen
6）Select "Advanced Options" from the "Troubleshoot" screen
7）Select “Windows startup settings screen” from “Advanced Options”
8）Click the "Restart" button
9）The system will reboot to the “Advanced Boot Options” screen
10）Select "Disable Driver Signature Enforcement"
11）Once the system is booted, you can install Arduino driver the same as Windows7
3、If your computer is a Windows XP system: The installation steps are basically the same as for Windows
7, please refer to the above Windows 7 installation steps.
2.1.3 IDE Interface Introduction
Nextly,we introduce the Arduino IDE interface, firstly enter the software directory. Then you can see the
arduino.exe file and double-click to open the IDE. As shown in Figure 2.1.11.
Figure 2.1.11 Software Catalog
1、The first thing you can see is the interface of the following figure. The functions of the toolbar buttons
are "Compile" - "Upload" - "New Program" - "Open Program" - "Save Program" - "Serial Monitor" , as
shown in Figure 2.1.12.

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Figure 2.1.12 Arduino IDE Interface
2.There are 5 menus on the menu bar, but we mainly introduce File and Tools. Click File, the interface as
shown in Figure 2.1.13 will be displayed, you can see the Examples and Preference options. The Examples
are some of the Arduino's own programs, these are compiled without errors, the normal use of the program,
a great help for beginners. The Preference option, It’s mainly about the parameter settings, such as language,
fonts and so on.
Figure 2.1.13 File Menu Bar Options
3、Click Tools, the interface shown in Figure 2.1.14 will pop up. Here we can see two options: Board and
Port. In the board option, we can see the commonly used Arduino development board model, we only need
to choose according to their own development board. In the Port option, the USB serial port is mainly
selected, as shown in Figure 2.1.15. If you are not sure, you can check it in the "Device Manager" and select
the corresponding COM port.

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Figure 2.1.14 Tools interface
Figure 2.1.15 USB serial port selection
So far, we have basically completed all the work. The next step is actual experiments. Open any program in
Examples. First compile the program. If it is compiled correctly, it can be directly downloaded to the
development board and the corresponding device of the connection number. With wires, you can see the
corresponding phenomenon.

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Chapter3 Experiments
3.1 Assembly of the Car
3.1.1 Motor installation
Step1: You need to install the motor mount.
Figure 3.1.1 Schematic diagram of motor mounting
Note: You need to use the screw to pass through the front hole of the motor, the motor holder corresponds to
the opposite position and use the nut to fix the motor holder.
Figure 3.1.2 Effect diagram of motor mounting

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Step2: You need to solder the wire to the motor.
Figure 3.1.3 Effect diagram of solder the wire
Step3: You need to fix the wire with a cable tie.
Figure 3.1.4 Effect diagram of fixing the wire

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Step4: You need to install motors.
Figure 3.1.5 Schematic diagram of motor installation
Figure 3.1.6 Effect diagram of motor installation

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3.1.2 Wheel and drive module installation
Figure 3.1.7 Schematic diagram of wheel installation
Figure 3.1.8 Effect diagram of wheel installation

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Step2:You need to install motor driver module.
Figure 3.1.9 Shematic diagram of fixing motor driver board
Figure 3.1.10 Shematic diagram of fixing motor driver board