Smart Building
They trust us
Optimized management of buildings open to the public, with Viparis
Viparis is the European leader in hosting conventions and trade shows. Every year, it welcomes 10 million visitors and organizes 800 events at 12 sites in the Paris region. To guarantee optimum visitor comfort and efficient infrastructure management, Viparis called on Synox for equipment supervision, to improve energy efficiency and optimize facility maintenance.
With over 500,000 m² of exhibition space to manage, it’s difficult to measure the temperature at every point throughout the day. ” So installing connected objects made perfect sense for us,” says Didier CAYET – Network Manager.
At Viparis, the project has a twofold challenge: firstly, an operational challenge, to identify any drift in the buildings’ operating status; and secondly, a challenge in terms of our ability to offer new services to our customers.
Expectations
Viparis’ objective is to guarantee exhibitors and visitors an enhanced customer experience, in terms of comfort, environment and modernity.What’s more, when organizers rent space from Viparis, they necessarily pay for heating/air-conditioning, cleaning, etc., which represent an expense item that needs to be kept under control. It is therefore important to be able to concretely measure and report on the balance between the comfort perceived by visitors and the costs incurred.
Tested and optimized network coverage
With its four levels, the CNIT presented a network coverage challenge. During the summer of 2024, a series of tests was carried out in several stages to assess sensor connectivity and optimize the infrastructure. The tests revealed the optimum coverage and enabled the number of network gateways required to be adjusted, to improve the Spread Factor and guarantee greater network resilience.
An ergonomic interface and customized dashboards
After testing several market platforms Viparis was convinced by the data visualization solution SoDATA#Viz from Synox. This platform gives users total autonomy in creating and customizing dashboards, meeting the need for an open, scalable solution.
The dashboards developed enable you to :
- Monitor the status of sanitary facilities, with updates every two hours.
- View when thresholds (temperature, air quality, etc.) are exceeded.
- Monitor sensor battery status in percent.
- Display alerts in real time on a dedicated screen in the building.
- Navigate by level and zone thanks to dynamic mapping.
- Generate a specific dashboard displaying only alert triggers.
The deployed solution
Viparis chose Adeunis Comfort CO₂ sensors to monitor indoor air quality and Skiply to measure satisfaction. The LoRa network, chosen for its long range and low energy consumption, was preferred in a private infrastructure to avoid recurring costs and maximize sensor autonomy thanks to a mesh network.
Two floors of the CNIT have been fitted with Adeunis confort CO2 sensors to monitor indoor air quality and regulate temperature according to the presence of visitors. Viparis must guarantee a temperature of between 19° and 21°C, particularly during events, to ensure optimum comfort while controlling energy consumption. In addition, a threshold of 800 to 1500 ppm of CO₂ has been set to enable real-time adjustments if necessary.

Didier Cayet, VIPARIS Network Manager
Identity card
Activity: Manager of congress and exhibition sites
Date of creation: 2008
Workforce: +400 employees
Location: Paris Ile-de-France
Scope
- The daily users of the solution belong to the technical teams, sales departments and service providers.
- 800+ sensors deployed on 3 sites
Goals
- Objectivize the comfort and well-being of visitors on all sites
- Identify the drifts on the state of operation of the various buildings
- Offer new services to improve customer experience and satisfaction
Results
- Increase in the satisfaction rate from 70 to 80%.
- Real-time monitoring of comfort and service quality
- Creation of new services
- Increased operational efficiency
Improving visitor satisfaction
To enhance the visitor experience, Skiply satisfaction sensors have been installed in all CNIT washrooms. These sensors enable users to indicate their level of satisfaction via a button. An alert is triggered when at least 20 presses on the “Not satisfied” button are recorded in the space of two hours, with the ultimate aim of optimizing the intervention of cleaning teams.
A scalable, secure IoT network
Viparis opted for a private infrastructure to avoid the recurring costs associated with objects, and to optimize sensor autonomy thanks to a mesh network. Thanks to the solution implemented by Synox, technical teams now have direct access to data and can intervene rapidly without intermediaries.
In the event of incidents such as sensor theft, Synox has also set up a rapid replacement system, enabling sensors to be replaced autonomously without having to modify the existing architecture.
Gradual roll-out to other Viparis sites
The success of the project at CNIT paves the way for a gradual extension to other Viparis sites. Viparis is currently working with Synox to optimize the existing infrastructure and deploy additional sensors at several other sites in the Paris region.
A constantly evolving partnership
Viparis and Synox are actively collaborating to optimize costs and free up resources to test new solutions. This partnership testifies to Synox’s ability to offer IoT solutions tailored to the specific needs of Viparis, contributing to continuous improvement in infrastructure management and customer experience.
Download the testimonial in PDF
Synox is a French publisher of IoT solutions. A pioneer in IoT for the past 10 years, Synox helps its 1,300 customers in France, Europe and around the world to do their jobs better, by imagining IoT ecosystems with high added value: powerful and invisible, sustainable and responsible, tailored to their needs and tailored to their uses.
Viparis is the European leader in conventions and trade shows. It operates 9 major event sites in the region and welcomes 10 million visitors (general public, professional visitors, spectators) and 800 events in all sectors every year.


