We build devices from proven modules, write their firmware and design the data links and web interfaces our clients use to run them. We specialise in industrial telemetry, monitoring of solar plants and heating systems, and energy savings — wherever hardware, network and software all have to work reliably at the same time.
We build hardware on proven modular components, and where an off-the-shelf part is not enough, we work directly with hardware manufacturers. Firmware, data links and web interfaces we do ourselves. You deal with a single supplier — we make sure all the parts work together.
Custom firmware on proven hardware modules — from bus drivers to robust operation in the field. Custom hardware we deliver together with manufacturers.
Reliable connections even where the signal is weak and data is expensive. We design protocols that send only what matters.
Clear interfaces where operators see the state of the equipment in real time and understand it without training.
Update and configure devices in the field remotely. No trip to the site, no service laptop.
We measure, evaluate and control consumption so that heating does not run at full power when it is not needed.
We can handle older systems too, even those with no documentation left. No need to throw away what works.
Round-the-clock monitoring of solar power plants. We watch every inverter individually and alert operators before a fault shows up in the yield.
Examples of what a complete solution looks like in practice — from an inverter on a solar farm and a device on a heating system all the way to a control room in the browser.
Round-the-clock monitoring of nine solar parks with a total installed capacity of 18 MWp. Every minute the system checks the status and output of all inverters and reports a fault before anyone would notice it in the yield.
Our own platform for remote monitoring and control of boiler rooms, running on our infrastructure. Operators see a live process diagram, measurement history and alarms, and can change control parameters remotely.
A system for remote supervision of boiler rooms and their control. Live equipment status, camera feeds and alerts to your phone — from anywhere.
Beyond Hoojer Tech's client work, we have dozens of other projects behind us — from our own hardware and firmware through industrial terminals to e-shops and company intranets. This breadth is what lets us take a project from the device all the way to the web.
Watering based on actual soil moisture, controlled from your phone — over the internet, or directly via Bluetooth when the network is down.
A label printer prototype that can be controlled from the command line, from a script or from a web application — ideal for automated printing.
A terminal for an attendance system that records arrivals and departures even when the network is down.
Opening the door from a phone without replacing the existing doorbell — the device connects directly to both old and new home intercoms.
Extensive experience controlling smart TVs remotely over various interfaces — USB, Ethernet, Wi-Fi and serial line.
Ticket sales for exhibitions, connected to the company information system and a payment gateway.
Mobile scanners for large exhibitions and trade fairs that work online and also where the signal in the hall keeps dropping. The same system can just as well be built for a warehouse.
Other projects include a social media content aggregator for a car manufacturer, a Bluetooth digital scale and a timer for the UV lamp used in PCB making. Older projects are described in more detail on the founder's personal website tomas.hujer.eu.
We choose tools to fit the job, not the trend. Here is a cross-section of what we have proven in live operation.
Hoojer Tech s.r.o. is a Czech technology company that works mainly online for clients across the Czech Republic — and in person in Jablonec nad Nisou, Liberec and Prague. It builds on more than fifteen years of independent development — from 8-bit processors and industrial controllers, through embedded Linux and IoT platforms, to web applications and running our own server infrastructure.
We have also been through the development of devices for the healthcare sector, where the demands on safety and reliability are high. The curiosity about how things work inside has stayed — it has just turned into systems that people rely on.
Today our work centres on energy — monitoring solar parks, boiler rooms and energy consumption — and on the devices that collect such data and pass it on.
We enjoy projects where hardware meets software and where things first need to be understood in depth. We are as comfortable with an oscilloscope as with a production database, with a datasheet as with someone else's source code — which is why we don't pass responsibility back and forth between suppliers.
We build solutions that run unattended for years: light on mobile data, updatable remotely and built on open technologies, so that you stay in control of your data. And we like to prove that “it can't be done” is a myth.
Get in touch. We will go through your brief, discuss what makes sense technically and economically, and propose a solution — even if it ends up looking different from what you expected.
Custom development is not the cheapest route. It pays off where a device has to run for years and has to be dependable.
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