This device is an USB to RS485 adapter, that does not require a driver and does not install a virtual COM port.

It is able to send and receive data on a RS485 bus. In addition, it is also able to autonomously query devices (for instance using MODBUS) and interpret the received replies to expose them as if they would come from a Yoctopuce sensor, with all inherent advantages: unique identifier, polling, callbacks, datalogger.

Be aware that this device will not work with applications designed to use a COM port: it is designed to be used with Yoctopuce API only.

The device is electrically isolated, which means it can be connected on a RS485 bus using a different ground circuit. The Yocto-RS485 conforms to ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) standards, and provides a ▒15 kV ESD protection on RS-485 input/output pins.

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.

Yocto-RS485 Yocto-RS485 Yocto-RS485

USB cables and enclosure to be ordered separately.

CHF 68.42

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Manufacturer Product NumberRS485MK1
Product nameYocto-RS485
USB connectormicro-B
Max frequency115200bps
Supported Operating SystemsWindows, Linux (Intel + ARM), Mac OS X, Android
Driversno driver needed
API / SDK / Libraries (USB+TCP)C++, Objective-C, C#, VB .NET, Delphi, Python, Java/Android
API / SDK / Libraries (TCP only)Javascript, Node.js, PHP, Java
Suggested enclosureYoctoBox-Long-Thick-Black
Made inSwitzerland

Related articles and application examples

 And here is the Yocto-RS485!  A quick tutorial on RS485 and MODBUS  Monitoring electric consumption over GSM 

Accessories and related products

YoctoBox-Long-Thick-Black, Enclosure for Yoctopuce device (long, thick, black)USB-A-MicroB-100, A to micro-B USB data cable, 100 cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modulesYoctoHub-Wireless-g, Wireless-enabled hub for Yoctopuce modules


User manual (HTML)
User manual (PDF)
3D file (STEP)
Last Firmware25322 (09/09/2016)
Library for Javascript25534 (10/10/2016)
Library for PHP25534 (10/10/2016)
Library for Objective C25534 (10/10/2016)
Library for C++25534 (10/10/2016)
Library for C#25534 (10/10/2016)
Library for VisualBasic .NET25534 (10/10/2016)
Library for Delphi25534 (10/10/2016)
Library for Python25534 (10/10/2016)
Library for Java25534 (10/10/2016)
Library for Android25534 (10/10/2016)
Library for Command line25250 (08/23/2016)
Virtual Hub for Windows25601 (10/19/2016)
Virtual Hub for Linux, Intel + ARM25601 (10/19/2016)
Virtual Hub for Mac-OS-X25601 (10/19/2016)

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