You need several USB relays in a tight form factor ? The Yocto-MaxiPowerRelay controls 5 relays. Each of these relay can handle up to 250V and 5 Amp. The relay state is reflected by a LED. This module does not need external power, but the host computer or the hub to which the module is connected must be able to provide up to 250 mA.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-g, it can even be connected to a GSM network thanks to the YoctoHub-GSM.

Enclosure available separately Yocto-MaxiPowerRelay Yocto-MaxiPowerRelay

USB cables and enclosure to be ordered separately.

CHF 60.31

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Part Number:MXPWRRLY
Product name:Yocto-MaxiPowerRelay
Hardware releaseRev. B
USB connectormicro-B
Max switching current5A
Max switching power1250W
Max withholding voltage1.5kV
Max working voltage250V AC
USB bus insulation3kV
Normal operating temperature5...40░C
Extended operating temperature-30...85░C
USB consumption~250mA
Supported Operating SystemsWindows (PC + IoT), Linux (Intel + ARM), macOS, Android
Driversno driver needed
API / SDK / Libraries (USB+TCP)C++, Objective-C, C#, VB.NET, UWP, Delphi, Python, Java, Android
API / SDK / Libraries (TCP only)Javascript, Node.js, PHP
Suggested enclosureYoctoBox-MaxiIO-Transp
Made inSwitzerland

1These specifications are for the current hardware revision. Specifications for earlier revisions may differ.

Related articles and application examples

 New product: the Yocto-MaxiPowerRelay  Yoctopuce relays and their secrets  Building a USB-driven variable resistor  Simulating large current consumption 

Accessories and related products

YoctoBox-MaxiIO-Transp, Clear plastic enclosure for the Yocto-Maxi-IOUSB-A-MicroB-100, A to micro-B USB data cable, 100 cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules


User manual (HTML)
User manual (PDF)
3D file (STEP)
RoHS Certificate (PDF)
Last Firmware28208 (07/28/2017)
Library for Javascript30760 (05/02/2018)
Library for PHP30760 (05/02/2018)
Library for Objective C30760 (05/02/2018)
Library for C++30760 (05/02/2018)
Library for C#30760 (05/02/2018)
Library for VisualBasic .NET30760 (05/02/2018)
Library for Delphi30760 (05/02/2018)
Library for Python30760 (05/02/2018)
Library for Java30760 (05/02/2018)
Library for Android30760 (05/02/2018)
Library for Command line30781 (05/03/2018)
Virtual Hub for Windows30566 (04/10/2018)
Virtual Hub for Linux, Intel + ARM30566 (04/10/2018)
Virtual Hub for Mac-OS-X30566 (04/10/2018)

Add a comment 6 comments

1 - webjoy Monday,october 10,2016 10H04

Do I need an USB entry to every activity

<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>

<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />

My device ask every time I connect the USB to the it, whether I want to give access to it or not. I activate the checkbox too,that should make the relay as a default usb connect.

I use <uses-feature android:name="android.hardware.usb.host"/>
as well in the manifest

What can I do to make the relay as default relay to a device.

2 - seb (Yocto-Team)Monday,october 10,2016 10H23

@webjoy: You do not need to add "android.hardware.usb.action.USB_DEVICE_ATTACHED" for every activity but only to the one that you want to start when de Yocto-MaxiPowerRelay is plugged.

In our application we have only one Activity that have the "android.hardware.usb.action.USB_DEVICE_ATTACHED" option, and depending of the state of the application we start one activity or another. See the app "Doc-Example" in the Android Library.

Regarding the "use as default" checkbox, Android has strange limitation: If your application is already started when you plug the device, the "use as default" option will be cleared on the next reboot. So if you want to get ride of this pop-up you need to ensure that your application is not running the first time that you plug the Yocto-MaxiPowerRelay.

If you still have trouble with the "android.hardware.usb.action.USB_DEVICE_ATTACHED" you can contact the support (support@yoctopuce.com).

3 - webjoy Tuesday,november 15,2016 16H13

Is it possible to use 2 Yocto-MaxiPower Relay at one android pc? One relay works fine, but 2 relais crashes.

4 - mvuilleu (Yocto-Team)Tuesday,november 15,2016 16H15

Yes, it should be no problem unless you are using Android 5.0 or 5.1, because of a bug introduced by Android 5.0 USB kernel. We have submitted a bug report to Android, and but the fix has only been made in Android 6.0 and not Android 5.x.

5 - webjoy Wednesday,november 16,2016 9H18

It is Android 5.1... Is it possible to use an Ethernet connector like YoctoHub-Ethernet with Android 5.1 or maybe a USB-hub ?

6 - mvuilleu (Yocto-Team)Wednesday,november 16,2016 14H39

@webjoy: Yes, going through Ethernet would work around the problem, since the Android bug is in the USB stack

Yoctopuce, get your stuff connected.