# ArduinoUno-ESP8266-2WD

**Repository Path**: thermalogic/arduino-uno-esp8266-2wd

## Basic Information

- **Project Name**: ArduinoUno-ESP8266-2WD
- **Description**: 基于Arduino UNO和ESP8266的WIFI控制2WD小车
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 2
- **Created**: 2024-07-31
- **Last Updated**: 2025-11-24

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#  The WIFI Controlled Car Using Arduino UNO and ESP8266(LCD1602A,BMP280)

* WIFI control:forward, backward, left and right turn, acceleration and deceleration
* Ultrasound obstacle avoidance
* Temperature and Pressure
* Display：distance of obstacle，temperature and pressure

![](img/2wd_wifi_lcd1602a_bmp280_atk-esp8266_edge_web.jpg)

## Components

* Arduino UNO R3 x1
  * Arduino UNO ProtoShield x1
* ATK-ESP8266 x1
* FT232 x1
* Motor Drive：L298N x1
* Ultrasonic Sensor：HC-SR04 x1  
  *  HC-SR04 bracket(yellow) x1 
* BMP280 Pressure Sensor  x1
* LCD1602A I2C x1
* Mini Breadboard: SYB-170 X1
* 2WD Robot Car Chassis Kit (1 universal wheels, 2 TT Tires, 2 TT motors, and 1 chassis) x1 
* Power: 800mAh 7.4V Lithium battery 

##  Code

* Arduino UNO: [CAR_WIFI_UNO_LCD1602A_BMP280](./code/CAR_WIFI_UNO_LCD602A_BMP280/) 
   * Arduino UNO ann ESP8266-01S communicate with software serial：**component_softserial.h**
* ESP8266-01S WIFI: [CAR_WIFI_ESP8266](./code/CAR_WIFI_ESP8266/)

**Modular design**: the codes of  each component as a header file, make it easy to add or subtract component and adjust functionality

## Software

### Install the ESP8266 Arduino core

* https://github.com/esp8266/Arduino

Copy this URL:

* https://arduino.esp8266.com/stable/package_esp8266com_index.json

and paste it in `Files -> Preferance-> Additional Boards Manager URLs`

Then go there: `Tools > Board > Boards Manager`, Look up `ESP8266` and then install the most recent version.

After installation, you can go into the `Tools > Board` and select that ESP8266 Module

![](img/ESP8266_Arduino.jpg)

#### Arduino UNO packages

* [SoftwareSerial](https://docs.arduino.cc/learn/built-in-libraries/software-serial/)
* [ArduinoJson](https://arduinojson.org/)

#### ESP8266 packages

* [ESP8266WiFi](https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/readme.html)
* [ESPWebServer](https://github.com/esp8266/ESPWebServer)
* [ArduinoJson](https://arduinojson.org/)

## Layout

### Arduino UNO R3

![](img/Arduino-UNO-R3.jpg)

### Ultrasonic Sensor: HC-SR04

![](./img/hc-sr04.jpg)

```c
// Ultrasonic - Arduino
#define TRIG_PIN 13  // Trigger
#define ECHO_PIN 12  // Echo
```
|HC-SR04      | Arduino Uno   |
|-------------|---------------|
| VCC         | +5V           |
| Trigger     | Pin 13  green  |
| Echo        | pin 12  blue  |
| GND         | GND           |

### Motor Driver: L298N

![](img/L298N.jpg)

#### TT Motors

| L298N        |  TT Motor           |
|--------------|---------------------|
| OUT4         |  Left Motor `+`     |
| OUT3         |  Left Motor `-`     |
| OUT2         |  Right  Motor `+`   |
| OUT1         |  Right  Motor `-`   |

![2WD Robot Car Chassis Kit](img/2WD-RobotCar-Chassis-Kit.jpg)

#### Arduino UNO and Power 

```c
#define RightBack 9    // Motor balck -  LS298N IN1-> Arduino Pin9
#define RightForward 8 // Motor red +   LS298N IN2 -> Arduino Pin8

#define LeftForward 5 // Motor  black - LS298N IN3 -> Arduino Pin5
#define LeftBack 4    // Motor Red +   LS298N IN4 -> Arduino Pin4

#define leftPWM 10
#define rightPWM 6 

```
| L298N        |   Arduino/Power  |
|--------------|------------------|
| ENA          |  Pin 6    orange |
| IN1          |  Pin 9    green  |
| IN2          |  Pin 8    blue   |
| IN3          |  Pin 5    yellow |
| IN4          |  Pin 4    blue   |
| ENB          |  Pin 10   orange  |
| VCC          |  Lithium Battery `+` |
| GND          |  Lithium Battery `-` and Arduino GND |
| +5V          |  Vin              |

## Breadboard 

BMP280和ATK-ESP8266安装于SYB-170面包板上

Arduino A4、A5连接到面包板，然后，连接BMP280和LCD1602A I2C模块的SDA、SCL 

* SDA -> A4
* SCL -> A5

![](img/syb-170-layout.jpg)

### BMP280

![](img/BMP280-Sensor-Parts.jpg)

### LCD1602A I2C

https://arduino.nxez.com/2020/10/08/arduino-drives-lcd1602-screen-through-i2c.html

* LiquidCrystal：https://www.arduino.cc/reference/en/libraries/liquidcrystal/

LCD1602A I2C Address: 0x27 

```c
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
 
LiquidCrystal_I2C lcd(0x27,16,2);  
```

![](img/LCD1602A-I2C.jpg)


## The WIFI of ATK-ESP8266 and Software Serial

###  ATK-ESP8266

![](img/ATK-ESP8266.jpg)

### Upload to ESP8266

Compile the programme,then upload to  ESP8266 with FT232(USB to TTL) 

* ATK-ESP8266：ESP-12E module

![](img/FT232.jpg)

| FT232   | ATK-ESP8266  |
|---------|--------------|
| RXD     | TX           |
| TXD     | RX           |
| VCC     | VCC          |
| GND     | GND and IO0(pull-down: USRT Download) |

Connect the GND of FT232 to the two pins of ESP8266 using a breadboard

###  Arduino UNO ann ATK-ESP8266 Communicate with Software serial

```c
#define SS_RX_PIN 3   // -> ESP8266 TX
#define SS_TX_PIN 11  // -> ESP8266 RX
```

*  The layout of Arduino UNO and ESP8266

|ATK-ESP8266      | Arduino          |
|-------------|------------------|
| VCC3.3      | +3.3V     orange  |
| RX          | Pin 11(soft serial TX) yellow |
| TX          | Pin 3 (soft serial RX) blue |
| GND         | GND    |

### Visiting the hotspot of ESP8266

* WIFI Hotspot ：

```c
const char *ssid = "ESP8266-WIFI";
const char *password = "12345678";
IPAddress ip(192, 168, 1, 1);
```

* Visit : http://192.168.1.1