> For the complete documentation index, see [llms.txt](https://docs.efento.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.efento.io/nb-iot-loggers/general-information/overview.md). # Overview ## What are Efento NB-IoT loggers Efento Narrowband IoT (NB-IoT) Loggers are wireless measurement devices designed to monitor environmental or process parameters (such as temperature, humidity, air pressure, open/close status, water leakage, or pulse counting) and seamlessly transmit data over a cellular network (Narrowband IoT). Because they communicate directly via cellular infrastructure, they operate as standalone units that do not require any additional infrastructure devices, such as routers or local gateways. These loggers are equipped with dual wireless interfaces: * NB-IoT communication - used to automatically transfer measurement data directly to the [Efento Cloud](https://docs.efento.io/efento-cloud/) platform or any other compatible third-party cloud architecture. * Bluetooth Low Energy (BLE) interface — used for local communication, allowing quick and easy configuration, status checks, and data access with a smartphone using a free mobile application. They are battery‑powered, highly energy-efficient, and engineered to operate maintenance‑free for up to 10 years (depending on the device type, transmission settings and / or signal conditions) on a dedicated battery. In case of good signal quality (ECL = 0), the device is able to transmit the data up to 195 000 times. ### Key features and capabilities * **Direct cellular connectivity** - Data is sent over cellular NB-IoT networks directly to the cloud without the need for any gateway or local network setup. This ensures rapid deployment and the ability to operate in highly distributed environments. * **Flexible data intervals & edge analytics** - Users can configure the measurement intervals from as frequent as few seconds up to once every 10 days. The devices also utilize edge analytics to evaluate data locally. If any user-defined safe threshold is exceeded, the sensor triggers immediate transmission to the platform. * **Large local memory** - Loggers store up to 100,000 measurements internally. If connection to the cellular network is temporarily lost, data is buffered locally and automatically synchronized as soon as the connection is re-established, ensuring zero data loss. * **Dual-interface configuration** - The presence of a Bluetooth Low Energy module allows for seamless local configuration using a smartphone. A full setup from unboxing to live deployment typically takes no more than 15 minutes. * **Wide sensor versatility** - Efento NB-IoT loggers support over 20 different physical and chemical parameter configurations (including internal/external probes for temperature, humidity, gas levels, and water level monitoring), allowing users to scale their fleet across multiple application types seamlessly. * **Software Over-the-Air updates (SOTA)** - Loggers can be remotely updated with the latest software version using a specialized delta mechanism. This ensures only the code differences are transmitted over the air, drastically saving both battery capacity and cellular data. * **Open integration standards** - Utilizing standard, universal IoT communication protocols (such as CoAP), data can be effortlessly piped not just to Efento Cloud, but integrated directly into third-party servers, software platforms, or other custom systems. ## Markings The following marks may be found on the Efento NB-IoT wireless loggers or/and on the packaging:
CE mark of conformity: indicating the fulfillment of Radio Equipment Directive (RED) 2014/53/EU
Dustbin symbol: Efento products must not be disposed of in the household trash, but only in accordance with local laws and regulations.
RoHS symbol: indicating the fulfillment of 2002/95/EC directive (RoHS)
FCC ID indicating the compliance with Part 15, Subpart C of the FCC Rules. Efento NB-IoT sensor FCC ID: 2BALY-HC5
## Liability The information provided in this operating manual describes the product’s functions and intended use but does not constitute a guarantee of specific performance or features. Efento shall not be held liable for any damage, malfunction, or loss resulting from, but not limited to: * **Improper or unintended use** of the device. * **Failure to follow the instructions** and safety guidelines described in this manual. * **Unauthorized modifications, alterations, or tampering** with the Efento NB-IoT loggers or their components. * **Improper installation, handling, or operation** of the device. * **Unauthorized repairs or attempts to service** the device by persons not certified by Efento. * **Use of incompatible accessories, power supplies, or antennas.** * **Damage caused by accidents, external factors, or environmental conditions**, including but not limited to moisture, extreme temperatures, or mechanical shock. * **Events classified as force majeure**, such as natural disasters or other situations beyond the manufacturer’s control. * **Operation outside the specified technical parameters** or use in environments not recommended for the device. These exclusions ensure clarity on the conditions under which warranty and liability may be voided. Please follow all guidelines to ensure safe and reliable operation of the Efento NB-IoT loggers. ## Manufacturer Efento sp. z o.o., Ul. Przemysłowa 12, 30-701 Krakow, Poland ## Technical support * We encourage you to read this manual thoroughly to fully understand and leverage all the features of Efento products. * If you have any questions while using the loggers, start by asking our AI assistant (Type your question into the search field in the page header and click **Ask**). * If you can’t find an answer, our support team is ready to help at [help.efento.io](https://help.efento.io/). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.efento.io/nb-iot-loggers/general-information/overview.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.