EZ-B v4 Wi-Fi Robot Controller

$79.99 USD

The brain of your robot or IoT device! Give your custom robot or IoT project features inspired from science fiction! With the electronics protected by a stylish plastic shell, the ez-bv4 clips into your ezrobot Revolution chassis or custom robot. It is easily controlled over Wi-Fi using ez-builder software.

The ez-bv4 boasts 200MHz of 32-bit processing (ARM Cortex-M3 & Microchip PIC32), 5 volt tolerant I/O, energy efficient digital switching power supply, Wi-Fi connectivity with security, embedded web server, amplified digital audio with speaker, 3 I²C ports, 3 x UARTs, 24 multi-use servo/digital/serial ports, 73 servos (Dynamixel & PWM), 8 analog ports, and integrated video, all in a tiny 2.1" x 2.2" size!

View Robots Built with EZ-B v4

Simplicity and power.

The ez-bv4 can be controlled over WiFi using the graphical ez-builder software on your PC or mobile device, without needing to program. The less time you need to spend with compilers, hardware programmers, and debuggers, the more time you can spend building and designing robotic projects!

Do you feel like you don't know where to start with robotics? Or are you overwhelmed by words like "compiler" and "microcontroller"? If so, then the ez-bv4 is for you!

The ez-bv4 is your robot's high tech brain.

Closeup view of e z b v 4.

The ez-bv4 is the world's most powerful and compact robot brain, suitable for all skill levels – from beginner to advanced. The stylish white plastic shell protects the speaker and electronics, with a speaker chamber for clear, enhanced audio. For advanced users, the ez-bv4 may be removed from its casing and mounted directly in your custom robot. [Learn More]


  • Compact size (5cm x 5cm x 3cm)
  • 200MHz 32-bit total processing (120 MHz 32-bit ARM Cortex-M3 processor & 80 MHz microchip PIC32)
  • Small size (2.1" x 2.2")
  • Wi-Fi connectivity (ad-hoc/infrastructure/WEP/WPA/WPA2)
  • Embedded web server
  • Energy efficient digital switching power supply
  • Resettable fuse protection
  • Reverse polarity protection
  • Amplified speaker for speech and music
  • 8 x 5 volt tolerant analog (ADC) ports
  • 24 x 5 volt tolerant digital ports (servos, PWM, and more)
  • Supports up to 73 servos (combining PWM and Dynamixel)
  • Dynamixel servo support
  • 3 x I²C ports
  • 1 x ezrobot video camera port
  • 3 x high speed UART ports
  • Battery and temperature monitor

Live Streaming Video.

Robot vision with streaming live video

Give your robot or IoT project the gift of sight with live streaming video. View the video on your mobile device or PC over the WiFi connection of the EZ-B v4.

Streaming Audio - Music, voices or sound fx.

Robot streaming audio of music, voices and sound fx

Robots need a voice! The EZ-B v4 has a built-in speaker to stream live audio from the PC or Mobile Device. Play music, sound effects or even text-to-speech through your robot or IoT project.

Education in the classroom, and at home.

Children playing with robots at home, and at school.

In the classroom or at home, ezrobot Revolution has a big impact on STEM education. Learn about robots, and have fun doing it! With hundreds of tutorials, no questions are left unanswered. Personalizing your ezrobot with new behaviors will teach students how robots walk, see, hear and interact with their surroundings to solve problems using a combination of science, technology, engineering and mathematics. Visit the EZ-Robot School!

Software that's easy to use.

A laptop with e z builder software in use.

If hardware is the heart of your ezrobot, then software is the soul. Introducing ez-builder, the world's easiest, most powerful, and most scalable robotics software. ez-builder takes a productive and unique approach to programming your robot. Simply add behaviors such as camera tracking, speech recognition, Wii controllers, GPS, GAIT positioning, and hundreds more!

Mobile control.

A tablet with ez-builder in use.

Use an Android or iOS mobile device with apps from our ez-cloud app store to control your robot or IoT project. Have an idea for a robot app? Create a robot app and share with it the world. ezrobot makes everyone an app developer!

The future is green.

Roli Revolution robot holding the earth in his claws.

You care about energy consumption with electronics. That's why ezrobot designed an innovative low energy digital switching power supply for our products. While most electronics dissipate heat to lower voltage, our products use an energy efficient power supply which generates practically no heat! Welcome to the future! :)

SKU: 0040