We do no longer sell our modules but we still maintain them on Github

Our mission

Very Simple Control Protocol Grodans Paradis AB is a very tiny Swedish company that is maintaining and building the free and open source project VSCP (Very Simple Control Protocol) m2m/IoT framework. We finance this project, that has been active since 2000, mostly with sponsoring and donations, but we also make and sell some automation modules that we sell. All modules are open hardware, with all documents, schemas, designfiles and firmware open and freely available (without any restrictions), and they can be used free of charge for projects using VSCP. Click products above to get more information about them.

And what about the frog? It's noting special about him at all. He is just a frog. Who does not love a happy frog?

Read more about the protocol that will unite them all on the VSCP site



Our product page has information about our full product range. Currently we have CAN, Ethernet, TCP/IP, 802.15.4 and wifi based products plus accessories for them.

Read more on our product page

Frankfurt RS-232 CAN4VSCP interface

Frankfurt RS-232
This module interface a computer (PC/Raspberry Pi/Beaglebone/Carambola etc.) and a CAN4VSCP bus. It comes with a USB to serial adapter and drivers are available for both Linux and Windows. It also have commands to make it easy to diagnose a CAN4VSCP bus.

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Paris - VSCP Relay module

Relaymodule Paris is a relay module that connects to a CAN4VSCP bus and can control up to seven external relays. The module can be attached to a standard DIN Rail or be mounted directly on a wall.

The module fully adopts to the CAN4VSCP specification and can be powered directly over the bus with a 9-28V DC power source. It has a rich register set for configuration and many information events defined. It also have a decision matrix for easy dynamic event handling.

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Beijing - VSCP I/O module

General I/O Beijing is a general I/O module that connects to a CAN4VSCP bus. The module has three opto isolated inputs and four 5V outputs.

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Accra - VSCP Counter module

General Counter module Accra is a general counter module that has three opto isolated general counter inputs and four general digital I/O.

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The VSCP shop


The frogshop is now live again. Well its the the VSCP shop now, but it is still also the frogshop. New VSCP products are in the pipe. Old products will be available in small volumes due to the chip shortage in the industry. Currently I have a just a small number of processors in stock and orders for new ones will not come true until Q2 next year at the earliest. So be patient.

CAN4VSCP Vilnius A/D module


The CAN4VSCP Vilnius A/D module is now available.

CAN4VSCP Accra Counter


The CAN4VSCP Accra counter module is now available.

CAN4VSCP Power Injector


The CAN4VSCP Power Injector module is now available.

VSCP & Friends 1.1.0


VSCP & Friends release 1.1.0 Sodium is out.

We go fully open


From now on all our software/firmware/hardware/docs/drawings etc is release under the open source license The Artistic License 3.0

Freescale VSCP project


Follow Freescales, Angus Galloway, when he makes Easy IoT with VSCP


The Odessa module is now available for immediate delivery.

Frankfurt RS-232

The Frankfurt RS-232 is now available for immediate delivery.

Interested in news?

Follow the the Frogs Blog for updates from the frogworld.

Article about VSCP

Article about ver 1.0.0 in the leading Swedish electronics paper Elektroniktidningen

PCB's and stencil...

PCB's and stencil for the CAN4VSCP-RS232 cards received today. The device will be available in the store in a few weeks.

Article about VSCP

A Swedish electronics paper wrote an article about VSCP 0.4.0 Fluorine release.

Frogs alive again

After being away on other ventures for a year we are well, kicking and alive again. Rock'n roll as usual in other words.

Frogshop is live

Our shop in now live.


Article in Swedish about our company

Prototypes tested

We are now starting our production run of all the CAN4VSCP boards.

Article on VSCP

A Swedish electronics paper wrote an article about VSCP. Read it here