FAQ: Frequently asked questions


What is the difference between UniPi 1.1 and UniPi Neuron?

Compared to the UniPi 1.1, which utilize GPIO and I2C as I/O modules, the Neuron communicates with up to three microprocessors connected by a high-speed data bus. Want to know more? Check our detailed comparison!

What is the difference between UniPi Neuron and UniPi Axon? 

Axon product line features the same anodized aluminium chassis as on the Neuron line, but in black colour for easy distinction between both product lines. The major difference is in the computing module - Axons are powered by a new industrial computer featuring 1.2GHz Allwinner H5 quad-core ARM CPU and 8GB eMMC onboard memory. Axons thus do not require memory cards as storage, improving their reliability during frequent rewrites. The Axon line also features enhanced functionality due to the newly introduced RS232 serial line, wider operating temperature range and other improvements. The comprehensible comparison can be found on this link. 

Is Raspberry Pi 3 included in all UniPi products?

With the UniPi 1.1, the Raspberry Pi is included only with basic and complete sets. The basic board is supplied without the computer. All Neuron units have Raspberry Pi included by default.

Can I use the Neuron without the SD card?

The Neuron product line uses the SD card to store image files of all software platforms. It is thus impossible to load software into Neurons without the SD. Currently, we are developing a new solution not requiring the card.

Does the Axon support different software solutions than the Neuron?

Axon is compatible with most software platforms supported by Neuron products. For the list of supported solutions, please visit this link

Is the Axon replacement for the Neuron product line?

Axon product line is intended primarily for customers who do not wish to base their systems on the Raspberry Pi computer. Axon thus represents rather a variant of Neuron than its replacement

Recently, I saw an offer for 4xAO expansion module for the UniPi 1.1, but I cannot find it on your e-shop. Is it possible to get it?

The module was phased out of production and is no longer available. We replaced the module with the Neuron 500 line, consisting of M523, L523 and L533 models. Alternatively, you can use the xS51 extension module, featuring 4 analogue I/Os. 


Are UniPi controllers provided with any pre-installed software?

UniPi 1.1/1.1 Lite and UniPi Neuron controllers are delivered without software. Prior to their use, it is thus necessary to manually install it. Customers can choose from a wide variety of supported solutions ranging from professional platforms to open-source software. Install the software according to its installation manual.
UniPi Axon controllers are by default delivered with pre-installed Mervis software. The software can be however manually re-flashed and replaced by any other supported software. Re-flashing guide can be found in Axon manual delivered with each controller.

Is it necessary to buy a license for using the Mervis software? 

The license is not required to run Mervis; the Mervis IDE programming interface can be downloaded from downloads.unipi.technology and used freely along with our products. The license is required only for connection to Mervis proxy server and for using the Mervis DB database. The database is not mandatory for using Mervis but represents one of the best tools available for data monitoring, storage and archiving for later evaluation. 
On the UniPi 1.1 and 1.1 Lite, the license request is available only as part of the Complete set.
All models of UniPi Neuron and UniPi Axon are then delivered with a licence request for each controller purchased. 

How long can I use CODESYS without purchasing a license?

Without a license, the CODESYS will be functional only for two hours. When the time runs out, the systém automatically locks down and its functionality can be restored only by purchasing the license. During these two hours, the CODESYS is however fully functional and you can test the systém thoroughly.

Can I use default Raspbian image for installing software into the UniPi 1.1 or the Neuron, or do I have to use the image provided by UniPi?

For the EVOK platform install, you can use either Raspbian Jessie or Raspbian Stretch image, or our UniPian image. Regarding Mervis and CODESYS, it is possible to use only the UniPian, as it contains custom low-level applications, which provide the system with a fast-control environment required.

I can‘t choose the software platform to use with your products. Can you help me?

Don‘t worry. Besides a brief description of possible solutions, we prepared a short software guide to help you with choosing the ideal software for you.

How can I update the Neuron firmware?

Neuron firmware is provided as part of our image files. When the latest UniPian is booted, the latest version of firmware is automatically flashed into the unit. If you need to update the firmware manually, you need to use our firmware update tool, requiring a USB-to-RS485 converter.

Can I use the default Raspbian image for my Neuron, or do I have to always use files provided by UniPi? 

The answer depends on the particular software platform used. With EVOK, it is possible to use Raspberry Jessie or Raspberry Strech in addition to the default UniPian. With CODESYS or Mervis however, it is necessary to use our UniPian image, as it contains several special low-level applications creating a control interface needed by said platforms. 


Are Neuron products certified?

We are ISO 9001 and ISO 27001 certified. All our products are compliant with the CE certificate and following domestic standards

  • ČSN EN 60950 ed. 2
  • ČSN EN 61000-6-3 ed. 2
  • ČSN EN 55014-1 ed. 3
  • ČSN EN 55022 ed. 3

We are also compliant with following directives issued by the Czech Republic government and directives of the European Parliament and Council, including all amendments.

  • government directive 17/2003 Coll + directive 2006/95/EC
  • government directive 616/2006 Coll. + directive 2004/108/ES
  • European Parliament and the Council Directive 2014/35/EU (Low-voltage devices directive)
  • European Parliament and the Council Directive 2014/30/EC (Electromagnetic Compatibility Directive)