# GridBit

> GridBit develops industrial IoT systems for energy, cities and buildings: the GWU-5 gateway and DIN-rail Modbus modules, the GridBit Cloud device management platform, street lighting management (SLMS), electrical infrastructure monitoring (EIM) and OccuSense energy control for hotels. GridBit is a spin-off of ADD Bulgaria, a company from Plovdiv, Bulgaria, at work on electricity grids and street lighting since 2006.

Facts that hold across the site:

- Company: GridBit, a spin-off of ADD Bulgaria Ltd. (https://www.add-bg.com), 141V Vassil Aprilov Blvd., 4027 Plovdiv, Bulgaria.
- Contact and quotes: office@add-bg.com, +359 32 623 001, https://gridbit.tech/contact
- Hardware: eight DIN-rail modules that talk Modbus RTU over RS485; one gateway reads up to 127 devices.
- GridBit Cloud works with GWU-5 gateways. Production data goes from the gateway straight to the customer broker, cloud or SCADA and never passes through the platform.
- Street lighting: more than 5 000 cabinets in more than 80 municipalities in Bulgaria.
- The site is in English (https://gridbit.tech/) and Bulgarian (https://gridbit.tech/bg). Every page exists in both languages under the same path.

## Solutions

- [GridBit Cloud: device management for industrial gateways](https://gridbit.tech/solutions/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.
- [Street lighting management](https://gridbit.tech/solutions/street-lighting): 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 monitoring](https://gridbit.tech/solutions/eim): Sensors, analysers and a gateway turn a secondary substation into a monitored asset. The platform shows the transformer and the low-voltage board in real time, with alarms and reports for the grid operator.
- [OccuSense energy control for hotels](https://gridbit.tech/solutions/occusense): 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.

## Hardware

- [All DIN-rail Modbus modules](https://gridbit.tech/hardware): the range with a filter by family.
- [GWU-5](https://gridbit.tech/hardware/gwu-5): 4G LTE gateway for Modbus devices, with Ethernet and MQTT.
- [GWU-4](https://gridbit.tech/hardware/gwu-4): 2G/4G gateway for Modbus RTU devices, two digital inputs.
- [GWU-2](https://gridbit.tech/hardware/gwu-2): 2G GSM/GPRS gateway for Modbus RTU devices.
- [MCU-4](https://gridbit.tech/hardware/mcu-4): Three-phase network analyser with Modbus RTU.
- [RTU-4](https://gridbit.tech/hardware/rtu-4): Astronomical relay with Modbus RTU and energy saving mode.
- [SMU-3](https://gridbit.tech/hardware/smu-3): Eight-channel AC voltage detector with Modbus RTU.
- [WDT-1](https://gridbit.tech/hardware/wdt-1): Watchdog relay that restarts devices when Modbus communication stops.
- [WDT-4](https://gridbit.tech/hardware/wdt-4): Modbus watchdog relay, fallback to photo sensor or clock.

## Company

- [About GridBit](https://gridbit.tech/about): the history since 2006, the numbers, the principles and the map of the projects.
- [Contact](https://gridbit.tech/contact): request form, e-mail, phone and address.

## Optional

- [Full text with FAQ and specifications](https://gridbit.tech/llms-full.txt)
- [Bulgarian version of the site](https://gridbit.tech/bg)
- [Sitemap](https://gridbit.tech/sitemap-index.xml)