This device is a USB to RS232 adapter, that does not require a driver and does not install a virtual COM port.

It is able to autonomously interpret serial data coming from any RS232 appliance and expose measures 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 without risk to an appliance powered on a different circuit. The Yocto-RS232 conforms to TIA/EIA-232-F standard (-5.5V and 5.5V output, and up to -25V... +25V as input). It is therefore compatible with all standard RS232 interfaces, but it cannot be wired directly to chips using logical CMOS/TTL levels.

The RJ12 to DB9 adapter for bidirectional communication (including CTS/RTS) is included.

The device can also analyze a RS232 bidirectional communication between two tiers without interference (using two input channels), but the adapter for this usage is not included.

If you need to interface a serial port working with CMOS/TTL levels, choose a Yocto-Serial.

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-RS232 The RJ11 to DB9 cable is included Enclosure available separately

USB cables and enclosure to be ordered separately.

CHF 71.41

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Part Number:RS232MK1
Product name:Yocto-RS232
USB connectormicro-B
Max frequency115200bps
USB bus insulation1kV
Normal operating temperature5...40░C
Extended operating temperature-25...85░C
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-Long-Thick-Black-RS232
Made inSwitzerland

Related articles and application examples

 New ! The Yocto-RS232  A USB scale without driver  RS232, mysterious protocol, and reverse engineering  Creating crystals  Scanning bar codes 
 A pseudo terminal for the Yocto-Serial  Yocto-RS232, SCPI and lab Instruments  Yocto-Visualization,  a free visualization app  Serial transmission and snooping 

Accessories and related products

YoctoBox-Long-Thick-Black-RS232, Enclosure for Yoctopuce device (long, thick, black)USB-A-MicroB-100, A to micro-B USB data cable, 100 cmRS232-Snooping-Adapter, RS232 snooping adapterYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules


User manual (HTML)
User manual (PDF)
3D file (STEP)
RoHS Certificate (PDF)
Last Firmware30620 (04/16/2018)
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 2 comments

1 - till.eulenspiegel Friday,june 09,2017 7H51


I would please need a little help here.
We have a old but reliable gas-measuringdevice which puts out a data string like this:

00 00 00 66 00 00 00 66 C8
19 01 00 67 00 00 00 81 C8
2E 01 00 66 00 00 00 95 C8

The first byte is the base of the measured Value and the second byte is the exponent of the measured Value. Ist it possible to store the Value in one genericSensor (Base and exponent calculated)?

thanks for the help.


2 - mvuilleu (Yocto-Team)Friday,june 09,2017 11H50

@till We can certainly find a solution. Please reach out to support by mail, and let us know if this output is in ASCII form or in binary form. If you have the datasheet of the sensor, that would also help.

Yoctopuce, get your stuff connected.