Olympia Odos is one of the most important national motorway projects in Greece, with strategic importance for the development of the Peloponnese, Western Greece and Epirus. The motorway, a total of 201.5 km, connects the three regions and the capital of the country with the most important gate of Greece to Europe, the port of Patras.

Olympia Odos S.A. was working on a more efficient way to do the heavy maintenance of their assets and be able to monitor their conditions. They had drafted a first vision of a wireless IoT solution, backed by cloud services that could provide big data and machine learning, with the ultimate goal being building a platform capable of providing predictive maintenance using all the aforementioned technologies. Ex Machina had worked previously with similar IoT projects such as in Athens Airport, making them a great candidate for the job. Ex Machina, accepting the challenge, assembled a consortium of top notch partnering companies, ES Systems and Delphis, to address the project goals.

The project aimed to the pilot installation of an innovative equipment monitoring and maintenance system for one of the tunnels of the motorway. The said system, called “Smart Tunnel”, continuously monitors equipment using sensors and sends data wirelessly to the cloud,  populating the system’s ML algorythms  with detailed maintenance data. The sensors covered a wide spectrum of the tunnel’s equipment and use cases:

  • vibration analytics for jet fans
  • electric pumps and power generator
  • electric systems monitoring (batteries, UPSs)
  • transformer monitoring (corrosion, humidity, temperature).
Ex Machina had the platform and contributed on the systems design and, most importantly, knew the key players in order to be able to carry out this job. They were swift and capable to adapt a different approach and thanks to them, the project has been so successful.
Grigoris ChasanisGrigoris Chasanis, Electromechanical Systems Manager, Olympia Odos

Ex Machina designed the solution, including a custom IoT gateway and a unique network topology setup, and coordinated the installation of the sensors, ensuring their seamless connectivity and operational integrity. The data collected by Ex Machina’s IoT platform are analysed in real time, already producing valuable insights. The project was delivered in respect to the customer’s deadlines and operations.

This is a comprehensive equipment monitoring solution that uses artificial intelligence and machine learning algorithms. This solution will be gradually rolled out in all the tunnels of the motorway.

The “Smart Tunnel” aims at better planning and implementing the infrastructure maintenance campaigns, using the new tools offered by the Internet of Things. Moreover, the system will also contribute to increase the equipment lifetime, to improve the safety and the service levels, as well as to make considerable tunnel maintenance cost savings.

Smart Tunnel Jet Fan Installation
Jet fan vibration sensor installation
Battery Sensors
Battery sensors installation
Electrical equipment monitoring

Deploying sensor nodes


OLYMPIA ODOS S.A. is the company selected by the Greek Ministry of Public Works to design, finance, construct, operate and maintain the Olympia Odos motorway for a period of 30 years, starting in 2008. The company has been named ‘National Winner’ in the 2019 European Business Awards, one of the world’s largest business competitions. It was also named as ‘Ones to Watch’, chosen from a list of 2,753 businesses.

More at www.olympiaodos.gr


ES SYSTEMS is a developer and manufacturer of high precision sensors focusing on applications in medical, industrial, hvac & aerospace markets. It is the only company in Greece that develops and manufactures high quality microelectromechanical sensors (MEMS) based on microelectronics technology. Recently ES SYSTEMS has also entered the Internet of Things (IoT) field by developing comprehensive solutions including sensors, data collection nodes and wireless transmission data in the cloud.

More at: www.esenssys.com


DELPHIS is one of the most progressive engineering companies in Greece, in the areas of air-conditioning, refrigeration and specialized services for facility management. Focused on high technology, innovation and excellence in services, DELPHIS offers optimized solutions for every customer.

More at www.delphisgroup.gr