The Yocto-IO device provides 4 digital I/O, electrically isolated from the USB bus. Each I/O bit can be configured individually as a simple input, an open-drain input (internal pull-up), a TTL/CMOS-like output, or an open-drain output (open collector).

Without external power source, each I/O pin can receive or produce a digital signal at 3V or 5V levels (low current).

With an external power source, the device can work with voltages up to 28V and deliver up to 250mA per channel, which makes it possible to drive small relays for instance.

If you need more channels, you can use the Yocto-Maxi-IO-V2.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-n and to a GSM network using a YoctoHub-GSM.

Yocto-IO Yocto-IO Enclosure not included

USB cables and enclosures to be ordered separately.

This product is not available anymore. It has been replaced by the Yocto-IO-V2


Product name:Yocto-IO
Replacement product:Yocto-IO-V2
USB connector:micro-B
Refresh rate:250Hz
Output impedance:<10Ω
Max working voltage:28V
Protection class, according to IEC 61140:class III
USB isolation, dielectric strength:1kV
Normal operating temperature:5...40░C
Extended operating temperature1:-30...85░C
Supported Operating Systems:Windows (PC + IoT), Linux (Intel + ARM), macOS, Android
Drivers:Driverless, no driver needed
API / SDK / Libraries:C++ Obj-C C# VB.NET UWP Delphi Python Java Android LabVIEW
API / SDK / Libraries (TCP only):Javascript Node.js PHP
RoHS compliance:RoHS III (2011/65/UE+2015/863)
Suggested enclosure:YoctoBox-Long-Thick-Black
Harmonized tariff code:9032.9000
Made in:Switzerland

1 The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.

Accessories and related products

YoctoBox-Long-Thick-Black, Enclosure for Yoctopuce device (long, thick, black)Fix-2.5mm, screws and spacersUSB-A-MicroB-50, USB 2.0 type A to Micro-B data cable, 50 cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules

Related articles and application examples


User manual (HTML)
User manual (PDF)
Product brief
3D file (STEP)
RoHS certificate
Most recent firmware51180 (12/02/2022)
Programming libraries61813 (07/05/2024)
Command line API61813 (07/05/2024)
VirtualHub application61813 (07/05/2024)

Add a comment 8 comments

1 - cesarcoll Tuesday,april 24,2018 15H14

Is it possible to use Yocto-IO as both a Yocto-button and a Yocto-relay? I'm trying to find a way of connecting it on the manual, but I couldn't find any help regarding the actual connections.

2 - martinm (Yocto-Team)Tuesday,april 24,2018 15H56

@cesarcoll : yes it can be done. The "magic" setting is the open drain parameter. More details in the user manual, 3.5. Configuration, I/O configuration.

3 - icys Tuesday,september 15,2020 9H50

My developing tool is node.js,
I download the User manual (PDF), in P.33 ,
it mentioned "To give it a try, go into one of the example directory (for instance example_nodejs/Doc-Inventory).
You will see that it include an application description file (package.json) and a source file (demo.js)."
But I can't find the files, where can I download them?

4 - mvuilleu (Yocto-Team)Tuesday,september 15,2020 10H03

@icys: This is probably because you have only installed the library as a node package, so you don't see the examples. You can download them from the full zip of Ecmascript library available on https://www.yoctopuce.com/EN/libraries.php

5 - karlgharios Wednesday,november 25,2020 10H45

Hi, we are looking to use this device on a pulse flow meter that needs an electronic counter that has to have an input frequency of at least 5 kHz. Would it be suitable for this application?

6 - martinm (Yocto-Team)Wednesday,november 25,2020 11H12

@karlgharios : A Yocto-PWM-RX would be better suited for that kind of application. see: www.yoctopuce.com/EN/products/yocto-pwm-rx

7 - bryan rushing Thursday,may 20,2021 19H48

Is there a STEP file for the Yocto-IO?

8 - martinm (Yocto-Team)Friday,may 21,2021 15H49

@bryan rushing : indeed, STEP file was missing, it is now fixed :-)

Yoctopuce, get your stuff connected.