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GWU-5 gateway on a dark studio set

The industrial gateway that stays managed.

GWU-5 connects the devices of a remote site to your systems. GridBit Cloud keeps every unit reachable, updated and secured, and it is designed for the requirements of the Cyber Resilience Act and built to support NIS2 compliance. Your team writes the application, not the infrastructure.

Fleet firmware updates

Update the whole fleet. It rolls back by itself.

New firmware goes to many gateways at once. If a version fails on a unit, that unit returns to the previous one.

Cyber security

Secure from the chip. Designed for CRA. Built to support NIS2.

The private key is created in the device and never leaves it. Secure Boot checks the kernel at every power-up, applications run in an isolated environment, and every action stays in an audit log.

Remote device management

Reach every unit. From anywhere.

Remote access to each deployed gateway: its parameters, its processes and the Modbus devices behind it.

Solutions

Multiple systems, one platform

Device management for industrial gateways, the digitalization of electrical infrastructure for municipalities and DSOs (street lighting, substations and the low-voltage grid) and energy control for hotels. Every system runs on GridBit hardware and the same platform.

GridBit Cloud

Fleet management

GridBit Cloud

Cloud management for fleets of industrial gateways: self-activation, over-the-air updates, alarms and remote access, with no access to your production data.

  • Self-activation with a QR code from the box
  • Staged updates with automatic stop and rollback
  • Production data never passes through the platform
Open
GridBit street lighting management

Electrical infrastructure digitalization

GridBit street lighting management

Control and monitor street lighting cabinets from one system, with schedules that follow sunrise and sunset, measurements per phase and alarms for every cabinet.

  • Live on the Siemens Xcelerator marketplace
  • Installed in Plovdiv
  • Alarm for failed luminaires, with the cabinet and the phase
Open
GridBit MV/LV transformer monitoring

Electrical infrastructure digitalization

GridBit MV/LV transformer monitoring

Temperature, load and alarms of the MV/LV transformer in a secondary substation, in real time. Sensors and a gateway go into the existing substation without changing the primary equipment.

  • Retrofit for existing substations
  • Hot spots, oil level and gas at the transformer
Open
GridBit LV switchgear monitoring

Electrical infrastructure digitalization

GridBit LV switchgear monitoring

Current, voltage, power and power quality on every phase of the low-voltage board, and the state of each outgoing feeder, fuse and protection, from DIN-rail Modbus modules and one gateway.

  • Every phase and every outgoing feeder
  • Harmonics from the 3rd to the 13th
Open
GridBit asset passportization

Electrical infrastructure digitalization

GridBit asset passportization

An asset register for DSOs, with an asset passport for every secondary substation that holds its identification, technical parameters and connected generation. It works on its own or together with monitoring.

  • Works on its own, without monitoring hardware
  • Identification, technical parameters and connected generation
Open
GridBit OccuSense energy control for hotels

Building automation management

GridBit OccuSense energy control for hotels

Energy control for hotels by the real occupancy of the rooms. Presence sensors without cameras, automation of the room climate, and evidence for the EPBD requirements in one platform.

  • Presence sensing without cameras or microphones
  • Retrofit installation without new cables
  • Evidence for BACS, air quality, SRI and MEPS 2030
Open

Benefits

Where the savings come from

Site trips, manual updates and servers of your own are inefficient and costly. This is where GridBit cuts the cost.

Trip to the siteManaged remotely
  1. Fewer site visits

    Configuration, diagnostics and firmware updates reach the device remotely. A technician goes out when the job needs hands.

  2. Lower technical and non-technical losses

    GridBit shows where the grid loses energy, through technical causes or unauthorised use, so you find the losses sooner and cut them.

  3. No security and update specialists of your own

    Security updates reach the devices in stages, at night if you want, and roll back by themselves where they fail. GridBit keeps the devices reachable and protected, so your team works on the application.

  4. Faults before the client calls

    Alarms by e-mail, Slack or Teams show a device that went silent or out of range.

  5. No servers and no data fees

    GridBit Cloud is a managed service. Your production data goes straight to your systems, so nobody charges you by data volume.

  6. Support for NIS2 and CRA

    Updates, a fleet inventory and an audit trail for what NIS2 and the Cyber Resilience Act ask about field devices.

Experience

Others follow the trend. We've been building it for 21 years.

GridBit is a spin-off of ADD Bulgaria. Our core technology team brings extensive hands-on experience in developing, implementing, and supporting projects across a wide range of industries. The solutions and products featured on this website are the result of years of development and practical experience.

About

ADD Bulgaria and GridBit in numbers

PlovdivBulgariaNorth MacedoniaTürkiyeGreece

Smart metering

More than 2.1 million smart meters

Remote metering started in Bulgaria in 2006 and later crossed into North Macedonia and Türkiye. The meters and the concentrators run in the grids of four DSOs.

smart meters in Bulgaria and North Macedonia
2.1 M+
data concentrators
21 000+
DSOs
4

Retrofit metering

First-generation GridBit hardware still runs

Marina Flisvos, the largest private marina in Greece, measures the water and electricity consumption of its yachts with the first generation of GridBit hardware. It still runs today.

  • Water and electricity metering
  • First generation hardware
  • Still running

Electrical infrastructure digitalization

Electrical infrastructure digitalization

Every day and night GridBit manages the assets of end customers in the low-voltage grid across the Balkans.

locations digitalized
4 500+
GridBit controllers and modules
18 000+
municipalities
70+

All-in-one platform

Tailored to your organisation

Our extensive portfolio of modular solutions can be tailored to your organisation's specific needs. Our experts handle the customisation, so you can focus on getting the most out of GridBit.

Municipalities that run their street lighting on GridBit

  • Aytos
  • Balchik
  • Bansko
  • Belovo
  • Bozhurishte
  • Brezovo
  • Brusartsi
  • Burgas
  • Chelopech
  • Chernoochene
  • Dalgopol
  • Devin
  • Devnya
  • Dimitrovgrad
  • Dobrich
  • Dobrichka
  • Dospat
  • Dragoman
  • Dryanovo
  • Dupnitsa
  • Dzhebel
  • Gorna Oryahovitsa
  • Hisarya
  • Isperih
  • Kardzhali
  • Kirkovo
  • Kocherinovo
  • Kostinbrod
  • Kozloduy
  • Kresna
  • Krumovgrad
  • Kubrat
  • Lyaskovets
  • Lyubimets
  • Maritsa
  • Mezdra
  • Miziya
  • Montana
  • Nesebar
  • Omurtag
  • Pavlikeni
  • Pazardzhik
  • Pernik
  • Plovdiv
  • Pomorie
  • Provadiya
  • Rakitovo
  • Ruse
  • Saedinenie
  • Sarnitsa
  • Smolyan
  • Sofia
  • Sopot
  • Sozopol
  • Stamboliyski
  • Stambolovo
  • Strelcha
  • Sungurlare
  • Suvorovo
  • Svishtov
  • Troyan
  • Tundzha
  • Varna
  • Veliko Tarnovo
  • Vratsa
  • Yambol
  • Zlataritsa

Questions

Short answers

Another question? Ask an engineer

What is GridBit?

GridBit is an industrial IoT technology company that develops hardware and software for energy, smart cities and buildings. Its range combines the GWU-5 industrial edge gateway with its operating system GridBit OS, DIN-rail Modbus modules and GridBit Cloud for remote device and fleet management. GridBit also delivers complete systems for electrical infrastructure digitalization (EID): street lighting management, MV/LV transformer monitoring, LV switchgear monitoring and GridBit Asset Passportization. For hotels, OccuSense manages energy by the real occupancy of the rooms. GridBit is a spin-off of ADD Bulgaria from Plovdiv, so it builds on years of experience in energy infrastructure, smart metering and large-scale IoT deployments.

What does the GWU-5 gateway do?

GWU-5 is GridBit's industrial edge gateway that connects field equipment to cloud or server infrastructure. It reads meters, controllers, sensors and other devices over Modbus RTU on RS485 and Modbus TCP on its LAN port, and runs local logic at the edge. When the connection drops, it keeps working, stores the data it has read and sends it once the connection is back. It connects over 4G LTE with 2G fallback, Ethernet, Wi-Fi and Bluetooth, so it fits different installation sites. Security is built into the device: Secure Boot, encrypted flash memory, a unique key for each device, signed applications and secure over-the-air updates with automatic rollback. GridBit Cloud registers, monitors, configures and updates GWU-5 devices remotely, over MQTT with mutually authenticated TLS.

What is GridBit Cloud?

GridBit Cloud is the cloud platform that manages fleets of GWU-5 industrial IoT gateways. It covers fast device onboarding, remote configuration, monitoring, alarms, diagnostics and controlled software updates across distributed sites. A gateway is activated with a QR code and updated remotely in stages: if errors pass the threshold, the rollout stops by itself and the affected devices return to the previous version. GridBit Cloud manages the gateways themselves, while each GWU-5 sends production data straight to your own broker, cloud platform or SCADA system, not through GridBit Cloud. You control the whole fleet from one place and keep your operational data in your own infrastructure.

What is GridBit OS?

GridBit OS is the operating system of GridBit gateways. It runs applications in an isolated environment, checks the digital signature of every software package and of the kernel, and receives over-the-air (OTA) updates through GridBit Cloud.

Can I develop my own application on a GridBit gateway?

Yes. You can develop and run your own applications on GridBit gateways, with the logic your project needs. The gateway sends the data straight to your broker, cloud platform or SCADA system, while GridBit Cloud handles remote device management, configuration and updates. Your team can focus on the application instead of developing its own device management.

Who uses GridBit systems?

GridBit systems are designed for organisations that run distributed, energy-intensive or remotely managed infrastructure: distribution system operators (DSOs), municipalities, energy service companies (ESCOs), industrial companies, building and facility operators, maintenance companies, renewable energy operators, water and pumping infrastructure operators, and hotels. GridBit hardware and software work in street lighting networks, transformer stations, photovoltaic plants, industrial equipment, pump stations, HVAC and building systems, EV charging infrastructure, agricultural sites and other remote assets that need reliable connectivity, monitoring and local control. In hotels, OccuSense manages the energy of guest rooms and plant rooms by occupancy.

What can I monitor with GridBit systems?

You can monitor electrical parameters, energy consumption, equipment status and the data of compatible meters, sensors and controllers. That covers energy monitoring, industrial IoT monitoring and remote asset monitoring in energy, municipal, industrial and building infrastructure. Typical sites are transformer stations, street lighting networks, photovoltaic plants, pump stations and water facilities, industrial equipment, HVAC and building systems, EV charging infrastructure, agricultural installations and other distributed or remote sites. In hotels, OccuSense manages energy by the occupancy of the rooms.

How does GridBit Cloud connect to my existing systems?

GridBit gateways send production data straight to your broker, cloud platform or SCADA system, without routing it through GridBit Cloud. You keep control of your operational data, connect it to your existing infrastructure and avoid vendor lock-in. GridBit Cloud works separately, over its own secure connection, for remote gateway management, configuration and software updates.

How do I get a quote?

Send the form on the Contact page or write to sales@gridbit.tech. If you can, include the type and number of sites, the devices you need to connect and the network available on site. The GridBit team replies by email or phone with a proposal for the GWU-5 gateway, GridBit Cloud and the modules your project needs.

Tell us what you are deploying

We answer with a proposal for the gateway, the platform and the modules your project needs.