Note: ALL OSOYOO Products for Arduino are Third Party Board which is fully compatible with Arduino

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Where to buy the set with 18650 batteriese and USB charger

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Buy the V2.1 Robot car without Battery and charger:

Buy from OSOYOO Buy from US Buy from UK Buy from DE Buy from IT Buy from FR Buy from ES Buy from JP

Objective:
In this project we will connect Robot Car to WIFI and Use an APP to control the car through Internet. This is a typical Internet of Things(IoT) Application.

You must complete lesson 5 before you continue on with this lesson.


Parts and Devices:

No. Picture Device Qty. Accessories Link
1 Ultrosonic Sensor 1 M1.4*8 Screw x 4
M1.4 Nut x 4		 Click here to buy
2 Servo Motor 1 M2.2*8 Self Tapping Screw x 2
M2*4 Self Tapping Screw x 1		 Click here to buy
3 Mount Holder for Ultrasonic Sensor 1 M1.4*8 Screw x 4
M1.4 Nut x 4
M2*4 Self Tapping Screw x 1		 Click here to buy
4 Buzzer Sensor Module 1 M3 Plastic Screw x 1
M3 Plastic Nut x 1
M3 Plastic Pillar x 1		 Click here to buy
5 Tracking sensor module 1 M3 Plastic Screw x 2
M3 Plastic Nut x2
M3 Plastic Pillar x 2		 Click here to buy
6 7pin 25cm Female to Female Cable 1 Click here to buy
7 20Pin jumper wire Male to female 20cm some Click here to buy
8 Philips screwdriver 1 Click here to buy
9 Hex Screwdriver 1 Click here to buy
10 M2*4 self tapping screw 1
11 M2.2*8 self tapping screw 2
12 M1.4*8 screw and nut 4
13 M3 plastic screw 1
14 M3 plastic pillar 1
15 M3 plastic nut 1

Hardware Installation :

Step 1: Install the smart car basic frame work as per lesson 5. If you don’t install tracking sensor module, please completed installation in Lesson 4.

Note: As the limited Digital signal pins, you need to remove some wires of lesson 2 and lesson3. If you have already completed installation in Lesson 1 , Everything keep it as is except move ENA from D9 to D3(we need D9 for Servo control). If you have installed Lesson 2 or 3, you have to remove the wires.

Step 2: Connect E_TX (Esp8266 TX) pin to D4(soft serial RX for UNO) and E_RX(ESP8266_RX) pin to D5(software serial TX for UNO) as per following picture

(Note: Our OSOYOO Uart WiFi shield V1.3 are connected BLE URAT TX/RX ports to D4,D5 with jumper caps by default. If you find the BLE URAT TX/RX ports are connected, you need remove these jumper caps and change to connect ESP URAT E-TX to D4 and E-RX to D5)

Step 3: Connect SG90 servo motor, OSOYOO MODEL X motor driver module and OSOYOO Uart WiFi shield V1.3 as following graph (If you complete wires in lesson 5, please skip this step)：

Step 4: Connect ultrasonic module, buzzer module with OSOYOO Uart WiFi shield V1.3 as below connection diagram (If you complete wires in lesson 5, please skip this step)

 

Step 5: Connect tracking sensor module with OSOYOO Uart WiFi shield V1.3 as below connection diagram (If you complete wires in lesson 4, please skip this step)

Note：

1）Please remember to adjust the sensitivity of tracking sensor modules as per link lesson 4
2）Please remember to do Ultrasonic sensor direction alignment as per link lesson 5

Software Installation:

Open-source Arduino
Software(IDE)		 Download IDE here:
https://www.arduino.cc/en/Main/Software?setlang=en
7 zip is a free zip
utility that un-zips zip files		 Download 7zip here for free
https://www.7-zip.org/
Osoyoo WIFI Robot APP search “Osoyoo IoT UDP Robot APP” in
Google Play or Apple Store(If you can not find this APP in Google Play,
you can directly download the APP from following link:
https://osoyoo.com/driver/udp-app.apk)

Step 1) Download OSOYOO Wi-Fi UDP Robot Car control APP
In Google Play or Apple Store, please search keywords “OSOYOO IoT UDP Robot APP”, you will find a red icon APP as following (Note: If you can not find this APP in Google Play, you can directly download the APP from following link: https://osoyoo.com/driver/udp-app.apk ):

Step 2) Please download the library zip file from WiFiEsp-master .Open IDE ->click Sketch ->Include Library ->Add .ZIP library , then load above zip file into sketch.

Step 3) Sketch code Installation:
Osoyoo V2 Robot Car can work in two WIFI modes: STA mode and AP mode. The sketches for these two modes are different. Let’s explain these two modes one by one

A)STA mode
In STA mode, V2.1 Robot Car will be a client device of your LAN router. You need save the SSID name and password of your LAN router in sketch.
Once the sketch is running, your router DHCP service will assign an IP address to your robot car and your APP will use this IP address to access your car.

1) Please download STA mode sketch code from v2smartcar-lesson6A . Unzip the file, you will see a folder “v2smartcar-lesson6A”. Open IDE -> click file -> click Open -> choose code “v2smartcar-lesson6A.ino” in v2smartcar-lesson6A folder, load the code into your board

2) You need change the code Line 96 and Line 98 :

char ssid[] = “YOUR_ROUTER_SSID”; // replace this with your router wifi SSID

char pass[] = “YOUR_ROUTER_WIFI_PASSWORD”; // replace with your wifi password

3) Upload the sketch to your board. Finally, click the Serial monitor window in upper right corner of IDE, you will see following result:

In above picture, the 192.168.0.117 is your robot car IP address. We will set this IP address to your APP so that APP can exchange data with the robot car.

4) Connect your phone with the same router Wi-Fi SSID as the  Arduino board. Open the APP, click “settings icon(1)” to enter setting UI, enter your robot car  IP address and Port to 8888, click Save, then click back icon(5) to back control UI.
Example: If your Robot Car IP is 192.168.0.107, you can set the APP as following pictures:

Now your Robot car is connected to your LAN, you can use Mobile phone under same LAN to control the robot car. If your APP is in WAN, you need to go to your Router Control Panel, forward Port 80 to Robot car LAN IP address, then you can use Router IP to control the car. This feature makes our robot car A REAL INTERNET OF THING device

B)AP mode
Sometimes we do not have a LAN or WIFI Router. In order to control the car, we need to use AP mode.
When working in AP mode, our robot car itself will become a WIFI Hot Spot. Our cell phone can connect to Robot Car as its wifi client. The IP address of Robot is fixed as 192.168.4.1 and It is not connected to WAN.
1) Please download sketch from following link: v2smartcar-lesson6B. Unzip the file, you will see a folder “v2smartcar-lesson6B”. Open IDE -> click file -> click Open -> choose code “v2smartcar-lesson6B.ino” in v2smartcar-lesson6B folder, load the code into your board

2) Open Serial monitor, and you will see a similar result as STA mode. A new WIFI SSID “osoyoo_robot” with IP address 192.168.4.1 will show up in the window. This means your Robot car has a WIFI Hot Spot name “osoyoo_robot” , its IP address is 192.168.4.1

3) Connect your cell phone to “osoyoo_robot” wifi hot_spot, and set IP address as “192.168.4.1” and port to 8888 to your APP Setting section

Now your Robot car become a WIFI Hot Spot, you can use Mobile phone control the robot car.

Final Testing:

Trun on the car. Now click Setting to set up robot IP address.

A) In STA mode, you need connect cell phone to the same LAN ssid of your robot car and set IP address same as the Robot IP showed in Serial Monitor.

B) In AP mode , you need contact your cell phone to “osoyoo_robot” wifi hot_spot and set IP address as 192.168.4.1

you can click the ◄ ► ▲ ▼ direction keys to make the car move. Use || pause key to stop the car movement.

If you click Obstacle key, the car will do obstacle avoidance auto driving similar to Lesson 5

If you click Tracking key, the car will do link tracking auto driving similar to lesson 4
Note: F1~F6 are further development functions in the future.

FAQ:

Q1)How to tune the robot car speed?
A: If you want change the speed performance of the robot car, please following parameters in line 11 to 13:

#define SPEED 85
#define TURN_SPEED 90
#define SHIFT_SPEED 130

SPEED value determines forward moving speed
TURN_SPEED value determines turning speed
SHIFT_SPEED value determines parallel shifting speed

Q 2)What happened when you press buttons in OSOYOO WiFi UDP Robot Car APP ?
A: When you press a button of the APP, APP will send a single-letter message through UDP protocol to target device (in this example, our WIFI Shield)

Button UDP message
F1 F
F2 G
F3 H
F4 I
F5 J
F6 K
▲ A
▼ B
► R
◄ L
square E
obstacle O
tracking T

Q3)How does the board handle the UDP command?
Following switch(c) statements in v2smartcar-lesson6 sketch file are handling the UDP command

            switch (c)    //serial control instructions
            {   
  
               case 'A':Drive_Status=MANUAL_DRIVE; Drive_Num=GO_ADVANCE;  WorkMode="GO_ADVANCE";break;
               case 'L':Drive_Status=MANUAL_DRIVE; Drive_Num=GO_LEFT; WorkMode="GO_LEFT";break;
               case 'R':Drive_Status=MANUAL_DRIVE; Drive_Num=GO_RIGHT;WorkMode="GO_RIGHT";break;
               case 'B':Drive_Status=MANUAL_DRIVE; Drive_Num=GO_BACK;WorkMode="GO_BACK";break;
               case 'E':Drive_Status=MANUAL_DRIVE; Drive_Num=STOP_STOP;WorkMode="STOP_STOP";break;
               case 'O':Drive_Status=AUTO_DRIVE_UO;Serial.println("go OBSTACLE");WorkMode="OBSTACLE";break;
               case 'T':Drive_Status=AUTO_DRIVE_LF;WorkMode="line follow";break;
               case 'G':track_speed=track_speed+10;
                        if(track_speed>200) track_speed=200
                         ;break;
               case 'J':track_speed=track_speed-10;
                        if(track_speed<80) track_speed=80
                         ;break;
               default:break;
              } //END OF ACTION SWITCH

In above code, c in switch() brackets is the UDP data sent from cell phone APP. Once APP ▲ key is pressed, then case ‘A’ … line will handle the command and make car move ahead.

Q4) The serial window show error ” [WiFiEsp] >>> TIMEOUT>>>”

A: Please check the jumper caps and make sure that Jumper caps connect E_TX pin to D4 and E_RX pin to D5 as the Step 2 in hardware installation