In this tutorial-based article, we will learn more about the ESP32cam module and we will use it to make a remote-controlled car using Wi-Fi.


What is the ESP32-CAM module?



  • The ESP32-CAM is a normal microcontroller based on the ESP32 structure and it also contains a slot for a MicroSD card and an integrated camera. It’s very economical and easy to operate and is perfect for IoT devices requiring a camera with advanced functions like image tracking and recognition.


The architecture of the ESP32-CAM module

  • The ESP32-CAM module has lesser input and output pins than the ESP-32 module on which it is based. Most of the GPIO pins are used for the microSD card port and the camera.
    The thing which is missing from the ESP32-CAM module is the USB port to upload the code. In this project, we are going to use the CP2102 USB to UART module to upload the code to ESP32-CAM.

  • This module has printed circuits on both sides. On the top, the board has the connector for the camera module. It also has a slot for a microSD card on the top. 

  • On the bottom of the board, there is a reset switch that is used to reset the program uploaded from the software

  • As we know, ESP32-CAM shares the same structure as the ESP32-S. So the specifications of both the boards are almost the same.


  • 802.11b/g/n Wi-Fi.

  • Bluetooth 4.2 with BLE.

  • The clock speed is up to 160 MHz.

  • Computing power up to 600 DMIPS.

  • 520 KB SRAM plus 4 MB PSRAM.

  • Supports Wi-Fi Image upload.

  • Multiple sleep modes.

  • Firmware over the air (FOTA) upgrades are possible.

  • 9 GPIO ports. 

  • Built-in flash LED. 

Camera specifications

  • The image transfer rate of this module is 15-60 fps.

  • Output formats for this module include YUV422, YUV420, RGB565, RGB555, and 8-bit compressed data

  • Array size UXGA 1622 x 1200

  • Camera sensor of 2 Megapixel

Uploading the code to ESP32-cam



  • The ESP32-cam module has no USB port. So you cannot just connect it to your computer and upload programs onto it. 

  • To upload the code, you need to connect the esp32 to an external FTDI adapter. 

  • Make sure your Arduino software is up to date. Open the Arduino IDE.

  • Choose the File menu on the top menu bar.

  • Look for the preferences menu and click on it. 

  • Look for the textbox labeled “Additional Boards Manager URLs”.


  • Click on OK. This will save the settings which you have changed.

Hardware required

Software required

Car chassis and motors

CP2102 USB to TTL module

  • CP2102 module is a USB to UART converter module. It requires minimal external components. CP2102 can be used to connect devices to computers via USB.

L298N motor driver

  • L298N motor driver is perfect for driving DC motors and Stepper motors. It can control 4 DC motors or 2 DC motors with direction and speed control. This motor driver is perfect for robotics projects and perfect for controlling motors from microcontrollers. Perfect for driving DC stepper motors for micro line-follower robots, robot arms, etc.

Li-ion battery

  • 18650 is a single cell, compact and powerful cell with a 2200 mAh capacity. It is very convenient to fulfill the 3.7 Volt requirement with this cell. The battery terminals can use in any compatible battery adapter/holder or they can be permanently soldered to your application's power source wires. 

Circuit Diagram

Pins on L298N motor driver

Pins on the ESP32 Camera module













  • Connect the positive terminal of the battery to 12V and the negative terminal to GND.

  • Connect the two motors on the right side together and same with the left side. Now both the motors on the right side will move together. 

  • Now connect the two terminals of motors on the right side with pins Out 1, 2 on the motor driver. Similarly, connect the two motors of the left side on pins Out 3, 4.


The working concept of the Remote controlled car



  • ESP32-camera module works on Wi-Fi. So it can be given commands wirelessly via IP address.

  • As the command is given from an internet browser with the same IP address, the ESP32 then gives the command to the motor driver.

  • The motor driver then turns the motors which translate into motion.

  • Simultaneously, the ESP32-camera module can stream the video from the camera back to the browser via Wi-Fi.


Arduino Code


  • The code for remote controlled car using ESP32-camera can be downloaded here. >


Uploading the code for a remote-controlled car





Now your remote-controlled car is ready for use. Enjoy!


  • First, perform the steps given above to add ESP32 boards to your Arduino IDE.

  • Now go to tools. Set the values according to the given picture below.

  • Upload the code using the circuit diagram given for ESP32-cam and CP2102. Press the reset button on ESP32 if there is an error in uploading the code.

  • After uploading the code, remove the shorted pins IOO and GND.

  • Now open the Serial Monitor on Arduino IDE and press the reset button on ESP32.

  • A window like this will appear. Wait for it to say Wi-Fi connected. 

  • Once the ESP32 is connected to Wi-Fi, copy the IP address and open it in the browser of your device.

  • Now you can control the car remotely. You can also watch the live feed from the ESP32 camera and turn on/off the flash too.