EZ-B IoTiny

EZ-B IoTiny by EZ-Robot

Connection Type
Wi-Fi / USB
Number of servos
Audio Support
Camera Support
Available for purchase from:

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Introducing IoTiny, the smallest tiniest Robot/IoT controller of the EZ-B family. Powered by a 100mhz Cortex M4 ARM processor, the form factor allows you to use custom enclosures or fit in the tiniest places. Invent new IoT projects by easily controlling and automating nearly anything over the internet.


The datasheet is a document published by the manufacturer explaining the specific characteristics. The data sheet will provide information about operating temperature limitations, power consumption, and much more. Always check the data sheet for information about the IoTiny hardware and troubleshooting.

View Datasheet


  • Controlled by ARC PC and ARC Mobile
  • Wi-Fi (Skill, Telnet, HTTP, Discovery)
  • Supports ARC's skills, such as Speech & Visual recognition
  • SDK, Mobile & Microsoft Windows Software
  • Verbal Setup Prompts
  • 8 x Digital I/O, Servo, UART (tx only)
  • 2 x ADC
  • 1 x i2c
  • 1 x Camera Video
  • 1 x Speaker Output
  • Hundreds of skills & 3rd Party Plugins

IoTiny ports

Simplicity and power.

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

The v4/2 is the next-generation brain of your robot or IoT device, powering over 20,000 robots worldwide! Give your custom robot or IoT project features inspired by 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 ARC software.

The ez-bv4/2 boasts two Cortex ARM processors running at 220MHz to provide servo, digital i/o, real-time audio/video streaming, and more! 5-volt tolerant I/O, energy-efficient digital switching power supply, Wi-Fi connectivity with security, embedded web server, telnet server, amplified digital audio with the speaker, 3 I² C ports, 3 x UARTs, 24 multi-use servo/digital/serial ports, 73 servos (Dynamixel & PWM), eight analog ports, and integrated video, all in a tiny 2.1" x 2.2" size!

3 PIN (GVS) Connectors

Each port has three pins: GND (Ground), VCC, and Signal. The GND and VCC are for powering the device connected to the port. The Signal pin is connected to the EZ-B Microchip for reading or writing data from Digital or ADC. The GND and VCC pins are not connected to the Microchip; they are used only for powering the peripheral connected to the tiny.

For example, a servo has a three-wire plug that connects to one of the EZ-B Digital Ports. The wires of a servo connector are GND, VCC, and Signal. The GND and VCC provide power to the servo's motor and circuit. The Signal wire carries the information to tell the servo what position to move.

Connecting Camera

The EZ-Robot Camera connects to the EZ-B IoTiny the same way as an EZ-B v4 with a six-pin cable. Notches on the male connector match the EZ-B's female connector. This prevents the plug from connecting incorrectly. The camera connection is unique, making it easy to identify where to click. It is impossible to connect the camera cable to the wrong connector, as it only fits in the matching plug.

If the camera is disconnecting from your IoTiny, consider checking the connection cable. The leading cause of camera issues with the IoTiny is a loose connection cable. This happens when the camera or iotiny is moved around and the cable connection loosens. In a worst case scenario, if the cable is bent at the connection, a wire may break. However, this is uncommon and it’s suggested to simply disconnect and reconnect both sides of the cable connections.

Connecting Servos & I/O

The servos connect in the same fashion to the IoTiny as the EZ-B v4, shown in the video. Much like your home theater speakers, the cables of the EZ-B and peripherals are color-coded. The BLACK cable on the peripheral (i.e., servo) will connect to match the BLACK side of the EZ-B connector.

Connecting Over WiFi

Making an IoT Product

Learn how to create an Internet of Things (IoT) product using IoTiny.

Unregulated Power I/O

As an IoTiny, you must know how the power pins work. This is because you will build a custom robot with custom power requirements. The IoTiny does not regulate the power on the I/O pins. If you provide 12v to the IoTiny, the I/O pins will output 12v. Of course, this will damage any +5v peripherals connected to the IoTiny when using 12v. You must know how much power is being provided to the IoTiny and what you connect to the I/O pins. For example, the EZ-Robot Servos do not like power above 7.4 volts, so we recommend using Rechargeable AA batteries in the provided holder. If you wish to use an alternate power source, please be aware of this message and select a voltage rating that works with your application.

*Note: The only ports that have regulated power are for the Camera & i2c.

Learn Your Port Types


Working with digital means True (On) or False (Off). True means any voltage above 1 volt, and False means GND. There are eight digital ports on the IoTiny (D0 to D7)

Output is writing to a port: When a port has its digital value set to True, a +3.3 voltage will be outputted on that port. If the port has its digital value set to False, then the port will be GND.

Input is reading from a port: You can read the value of a specific port. This is how you can check for voltage, On or Off. Any voltage above GND (and below +5 volts) will be returned as True, and a short to GND will be returned as False.

Example peripherals for digital ports are Switches, Servos, Ultrasonic Distant Sensors, and Buttons.


ADC is short for Analog Digital Converter and is read-only (input only). This method reads voltages into the EZ-B Robot Controller. There are two analog input ports on the IoTiny (A0 to A1).

Reading Relative Voltage: The returned value will be between 0-255 in 8-bit mode and 0-4095 in 12-bit mode. These values represent the input voltage on the specified port. The value will be relative to the input voltage, between 0 and 5 volts. Example in 8 bit mode: Value 0 = 0 Volts, Value 127 = 2.5 Volts, Value 255 = 5 Volts.

Reading Absolute Voltage: Returns the value in actual volts on the specified port.

Example peripherals for analog input are Sharp GP2 Analog Distance Sensors, Pressure Sensors, Light Sensors, Sound Sensors, Color Sensors, and reading voltages.

Serial (tx only)

Every digital port of the IoTiny can transmit serial data. Serial Communication is the process of sending data one bit at a time in a sequence. Serial communication is common with many peripherals because it allows commands to be transmitted over one wire. The transmission works similarly to Morse code.

The Sender and Receiver need to be configured for the baud rate (speed) in which the data will be transmitted. Common baud rate speeds are 300bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps and 115200.

Examples of serial communication peripherals are LCD Screens, Motor Controllers, Servo Controllers, Computer Communication, Arduino Communication, iRobot Roomba, and more.


The I2C is also referred to as the "Two Wire Interface." There is an I2C connector on the IoTiny. I2C is a communication method invented by Philips to communicate with peripherals. The I2C uses two wires for communication, Serial Data Line (SDL) and Serial Clock Line (SCL).

I2C devices can be chained together in a network formation. Each device is given a unique address. The IoTiny has one I2C header, which provides signal wires and +3.3v power.

Examples of peripherals for I2C communication are LCD Screens, I2C enabled Servos, BlinkM Multicolor LEDs, and more.

Click here for more information on understanding i2c addressing.

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