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

It can autonomously interpret serial data coming from any RS232 appliance and expose measures 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 the Yoctopuce API only.

The device is electrically isolated, which means that it can be connected without risk to an appliance powered on a different circuit. The Yocto-RS232 conforms to the 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 an RS232 bidirectional communication between two tiers without interference (using two input channels), but the adapter for this usage is not included (check the accessory list below).

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-n and to a GSM network using a YoctoHub-GSM.

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

USB cables and enclosures to be ordered separately.

CHF 71.67

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Hardware release:Rev. B
Product ID:RS232MK1
Product name:Yocto-RS232
USB connector:micro-B
Max frequency:115200bps
Protection class, according to IEC 61140:class III
USB isolation, dielectric strength:1kV
Normal operating temperature:5...40░C
Extended operating temperature2:-25...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-RS232
Harmonized tariff code:9032.9000
Made in:Switzerland

1 These specifications are for the current hardware revision. Specifications for earlier revisions may differ.
2 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-RS232, Enclosure for Yoctopuce device (long, thick, black)USB-A-MicroB-50, USB 2.0 type A to Micro-B data cable, 50 cmRS232-Snooping-Adapter, RS232 snooping adapterYoctoHub-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 firmware60578 (04/17/2024)
Programming libraries61305 (06/11/2024)
Command line API61199 (05/30/2024)
VirtualHub application61458 (06/14/2024)

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.