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

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

Be aware that this device does 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: it can be connected on an RS485 bus using a different ground circuit. The Yocto-RS485-V2 conforms to ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) standards. In addition, the connection to the RS485 bus is protected against ESD up to ▒16 kV (contact) and against electrical fast transients up to ▒4kV.

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-RS485-V2 Yocto-RS485-V2 Yocto-RS485-V2

USB cables and enclosures to be ordered separately.

CHF 90.70

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Product ID:RS485MK2
Product name:Yocto-RS485-V2
USB connector:micro-B
Max frequency:115200bps
Protection class, according to IEC 61140:class III
USB isolation, clearance dist.:6mm
USB isolation, creepage dist.:6mm
USB isolation, dielectric strength (1 min.):4kV rms
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)USB-A-MicroB-50, USB 2.0 type A to Micro-B data cable, 50 cm

Related articles and application examples


User manual (HTML)
User manual (PDF)
Product brief
3D file (STEP)
RoHS certificate
Most recent firmware60578 (04/17/2024)
Programming libraries61039 (05/21/2024)
Command line API61039 (05/21/2024)
VirtualHub application61039 (05/21/2024)

Add a comment One comment

1 - robert@eriinc.com Friday,february 05,2021 15H16

Is it possible to directly communicate between the Yocto 4-20mA Rx and the Yocto RS485-V2? Specifically, I am looking for the ability to remap Yocto 4-20mA Rx values from the Yocto RS485-V2.

Yoctopuce, get your stuff connected.