Description
- Can be controlled over Wi-Fi
- Less time you need to spend with compilers
- Most powerful and compact robot brain
- Suitable for beginner and advance users
The EZ-B V4 WiFi Robot Controller can be controlled over Wi-Fi 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!
The EZ-B V4 WiFi Robot Controller is the world’s most powerful and compact robot brain, suitable for all skill levels – from beginner to advance. 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.
The EZ-B V4 WiFi Robot Controller Revolution introduces the world's easiest, most powerful and creative robots for R&D, experimentation and STEM education. Revolution is modular, so there is no limit to your creativity. These robots are assembled with ez-bits using clip’n’play technology for endless configurations.
- 1 x EZ-B v4 Wi-Fi Robot Controller in ABS plastic shell
- 1 x Power Shell
- Width: 5cm
- Length: 5cm
- Height: 3cm
- Weight: 0.035kg
PDF File
- 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
Works like a dream. Have it controlling my robots speed and direction along with video feedback using the EZ-B vs camera. Very happy especially with the interface and distance.
I've fooled around with arduinos for my projects but EZ-B V4 is so easy. Within 1/2 an hour I hade my servos working and doing what I wanted. I am very happy and impressed. WIFI connecting was solid for me.
This does a lot of amazing stuff, but still has a lot of issues relating to power draw and WiFi connectivity.
RobotShop shipped this out in a timely manner and at a great price. Very pleased.
Best controller ever. When paired with Synthiam's ARC control software it's unparalleled
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorisation (RA) before initiating a return request.
United Kingdom consumers exercising their statutory Right of Cancellation are subject to different conditions. See the Statutory Right of Cancellation.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorisation (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A £100 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables * — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tyres, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odour-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly * — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps * — Final sale only, due to licensing restrictions.
- Clearance Items * — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items * — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfil a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
* United-Kingdom consumers retain their statutory Right of Cancellation on these items. Its exercise is subject to the conditions and exclusions set out in the Statutory Right of Cancellation, and any reimbursement may be reduced to reflect a loss in value resulting from handling beyond inspection.
How to Request a Return Authorisation (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".


