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
New firmware goes to many gateways at once. If a version fails on a unit, that unit returns to the previous one.
Cyber security
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
Remote access to each deployed gateway: its parameters, its processes and the Modbus devices behind it.
Solutions
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.
Fleet management
Cloud management for fleets of industrial gateways: self-activation, over-the-air updates, alarms and remote access, with no access to your production data.
Electrical infrastructure digitalization
Control and monitor street lighting cabinets from one system, with schedules that follow sunrise and sunset, measurements per phase and alarms for every cabinet.
Electrical infrastructure digitalization
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.
Electrical infrastructure digitalization
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.
Electrical infrastructure digitalization
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.
Building automation management
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.
Benefits
Site trips, manual updates and servers of your own are inefficient and costly. This is where GridBit cuts the cost.
Configuration, diagnostics and firmware updates reach the device remotely. A technician goes out when the job needs hands.
GridBit shows where the grid loses energy, through technical causes or unauthorised use, so you find the losses sooner and cut them.
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.
Alarms by e-mail, Slack or Teams show a device that went silent or out of range.
GridBit Cloud is a managed service. Your production data goes straight to your systems, so nobody charges you by data volume.
Updates, a fleet inventory and an audit trail for what NIS2 and the Cyber Resilience Act ask about field devices.
Experience
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.
AboutSmart metering
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.
Retrofit metering
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.
Electrical infrastructure digitalization
Every day and night GridBit manages the assets of end customers in the low-voltage grid across the Balkans.
All-in-one platform
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
Hardware
Gateways, three-phase meters, astronomical relays, voltage detectors and watchdog relays. Every module has a datasheet and a Modbus register map.
All hardware
GatewayGWU-54G LTE gateway for Modbus devices, with Ethernet and MQTT
GatewayGWU-42G/4G gateway for Modbus RTU devices, two digital inputs
GatewayGWU-22G GSM/GPRS gateway for Modbus RTU devices
MeterMCU-4Three-phase network analyser with Modbus RTU
RelayRTU-4Astronomical relay with Modbus RTU and energy saving mode
InputsSMU-3Eight-channel AC voltage detector with Modbus RTU
WatchdogWDT-1Watchdog relay that restarts devices when Modbus communication stops
WatchdogWDT-4Modbus watchdog relay, fallback to photo sensor or clockGridBit develops industrial IoT systems for energy, cities and buildings. The range covers the GWU-5 gateway with its operating system GridBit OS and seven more DIN-rail Modbus modules, the GridBit Cloud device management platform, electrical infrastructure digitalization (street lighting management, MV/LV transformer monitoring, LV switchgear monitoring and GridBit Asset Passportization) and OccuSense energy control for hotels. GridBit is a spin-off of ADD Bulgaria from Plovdiv.
GWU-5 is a DIN-rail gateway that connects the devices of a remote site to your systems. It reads Modbus RTU devices on an RS485 bus and Modbus TCP devices on its LAN port, and sends the data over 4G LTE Cat 1, 2G or Ethernet. It also has Wi-Fi and Bluetooth. It runs GridBit OS, has one digital input, runs on 9 to 24 VDC and works from -20 to 60 °C. GridBit Cloud manages it remotely.
GridBit Cloud is the cloud platform that manages fleets of GWU-5 gateways. It covers self-activation with a QR code, remote configuration, staged firmware updates with automatic stop and rollback, alarms and remote access. The gateway sends production data straight to your broker, cloud or SCADA, so that data never passes through the platform.
GridBit OS is the operating system of the GridBit gateway. Your applications run on it in an isolated environment, it checks the signature of every package and of the kernel, and GridBit Cloud updates it over the air.
Electrical infrastructure digitalization (EID) is the field of GridBit systems for municipalities and DSOs: street lighting management, MV/LV transformer monitoring, LV switchgear monitoring and GridBit Asset Passportization. They share the same hardware and platform, and each one also works on its own. Every day and night GridBit manages the assets of end customers in the low-voltage grid across the Balkans, at more than 4 500 digitalized locations.
Yes. The gateway sends the data straight to your broker, cloud or SCADA, and you write the logic your project needs. GridBit Cloud keeps the devices reachable, configured and updated, so your team does not have to develop device management.
Distribution system operators (DSOs), municipalities, ESCO and maintenance companies, and hotels. The hardware works in street lighting cabinets, transformer stations, pump stations and other remote sites, and OccuSense works in hotel rooms and plant rooms.
In Bulgaria, Türkiye, Greece and North Macedonia. Street lighting control runs in more than 70 Bulgarian municipalities. ADD Bulgaria's smart metering counts more than 2.1 million meters in the grids of four DSOs in Bulgaria and North Macedonia. At Marina Flisvos in Greece, the first generation of GridBit hardware still measures the water and electricity of the yachts. In Türkiye, the team successfully completed a smart metering implementation. The grid monitoring systems grew out of a pilot for low-voltage grid monitoring in 2020.
Send the form on the Contact page or write to office@add-bg.com. Say how many sites you have, which devices and which network. GridBit answers by email with a proposal for the gateway, the platform and the modules your project needs.
We answer with a proposal for the gateway, the platform and the modules your project needs.
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