Efento Bluetooth Low Energy wireless sensors

Efento Bluetooth Low Energy sensors measure various values and wirelessly send the data to smartphones or, through Efento Gateways, to Efento Cloud. Wireless loggers are equipped with large built in memory, and battery which ensures long maintenance free operation.


Data from Efento Bluetooth Low Energy sensors can be read by smartphone with free mobile application or Efento Gateway. Depending on the use case (online monitoring or data logging), you will find a solution that suits you


Large capacity battery ensures five years of maintenance free operation. Efento Bluetooth Low Energy sensors use standard batteries, which can be replaced by the user


Communication between Efento sensors and mobile applications or Efento Cloud can be encrypted (AES128), so only the authorized devices can get the measurements


Sensor’s range is 100 meters in open space and 30 meters in buildings


Efento BLE sensor stores 40 000 measurements in its memory. This allows you to keep the measurements from a few months in device’s memory and read it in a convenient moment. Moreover, if your sensor lost the connection with Efento Gateway for a while, after re-establishing it, it will send the missing data

How does it work?

Efento Cloud

Wireless sensors that work with any platform

Taking measurements is just the beginning. IoT solutions must have a backend platform which analyses them. Efento wireless sensors can work out of the box with Efento Cloud and two mobile applications. On top of that, you can easily integrate them with your own mobile applications or with any Bluetooth Low Energy compatible device.



Efento Cloud is a powerful cloud-based platform that allows you to collect and visualize data from Efento sensors, no matter if you have only a few or hundreds of them. Efento Cloud allows you to display the data on a map, as a table or on a chart, send SMS and email notifications and generate PDF / CSV reports with the data. On top of that, there is a mobile application that allows you to get access to all platform features with your smartphone or tablet. Learn more about Efento Cloud.



Efento Bluetooth Low energy sensors can be integrated with any BLE enabled device. To make the integration easy, we can provide you with the BLE communication documentation or Android SDK which will speed up the development process. Moreover, you can integrate Efento Gateway directly to your cloud solution and receive the data over well known and widely supported REST.



Efento Transport is a solution for monitoring of the temperature of goods during transportation. Efento sensors send the data to a smartphone with a mobile application which allows drivers to constantly monitor the temperature and generate reports from deliveries. Efento Transport can be integrated with Transport Management Systems. Learn more about Efento Transport.



Efento Inspector is a solution dedicated to small clinics. It is used to constantly monitor the temperature of medical refrigerators, generate reports and send SMS / email notifications when the safe range is exceeded. Learn more about Efento Inspector.

Wide range of measured values

Let us know what you want to measure and we will provide you with a sensor. Each Efento wireless sensor can measure up to six values. Pick the values you want or check the list of ready made sensors that we have on stock. Do you need to measure something which is not on the list? Contact us and we will check, if we can measure that.

Efento sensors offer a very high accuracy of the measured values. If you wish, at an additional fee, we can provide you with a calibration certificate issued by a certified laboratory. Learn more about the calibration service.


Open / close



Pulse counters

Soil moisture



Quickly deploy hundreds of sensors

We know that deploying thousands of IoT devices may be frustrating and time consuming. That’s why we designed Efento wireless sensors and Gateway in a way to make the deployment proces as easy as possible


Sensors are mounted on the wall with a double side adhesive tape with acrylic glue. It takes seconds to install a single device and the tape which is included with the sensor sticks to any surface. If you don’t want to stick it with a tape, you can simply use screws to mount it on the wall


Connect Efento Gateway to your network and configure it with a mobile application over Bluetooth Low Energy. Once it’s configured, all the sensors in its range will automatically show up on your Efento Cloud account


Efento sensors communicate with Efento Gateway wirelessly and all configuration can be done with a mobile application. Forget about connecting wires or configuring sensors with you laptop.

Secure over the air updates and device management

Deploying IoT devices is only the first step. We are aware of that and have developed mechanisms that allow us to remotely update the firmware of Efento Gateways and change their configuration.


Efento Gateways firmware can be remotely updated. The whole communication between the server and the devices during the update process is encrypted and both parties have to authenticate with their unique keys. This ensures the security of the whole updated process. The Sensor’s firmware can be updated over Bluetooth Low Energy interface.


We know that when you deploy a large number of IoT devices remote device management is a must. The whole management of your wireless sensors and gateways is done from Efento Cloud.

Meet the lineup

Efento Bluetooth Low Energy sensor

Efento Gateway

BLE sensor
Efento bluetooth LAN
Bluetooth Low Energy (BLE)

Radio frequency: 2,4 GHz

Power: 2,5 mW (4 dBm)

Range: up to 100 m (LOS)

Transmission frequency: 1 s
Bluetooth Low Energy (BLE)

Radio frequency: 2,4 GHz

Power: 2,5 mW (4 dBm)

Range: up to 100 m (LOS)

Etherent: IEEE 802.3, IEEE 802.3u, RJ45 socket

AA, 3.6V battery, 2700 mAh (replaceable)
Battery lifetime up to 5 years
MiniUSB 230V AC, 5V DC / 1.0 A
Power over Ethernet (PoE) 802.3af (802.3at Type 1)

Measured values
Each sensor can have up to six slots

Each slot can measure: temperature (internal sensor or probe), humidity (internal sensor or probe), air pressure, differential pressure, soil moisture, VOC, open/close, pulse counter, leakage

Measurement interval
Configurable by user

Measurement interval: 1 minute – 10 days

40 000 measurements

If there is no connection between sensor and Efento Gateway, device will send the missing measurements automatically. Logger’s memory can be also read with a free mobile application. Once the memory is full, the oldest measurements are replaced with the new ones
500 000 measurements

If there is no network connection, device buffers the measurements from all the sensors and transfer them to the platform once the connection is re-established. Once the memory is full, the oldest measurements are replaced with the new ones

Communication protocols
Bluetooth Low Energy
Bluetooth Low Energy (communication with sensors)

TCP/IP, HTTP / HTTPS, REST (JSON) (communication with server)

Connection settings
Automatically sends the data to nearby devices

Communication can be encrypted (AES128)
BLE: automatically detects all nearby sensors

LAN: DHCP, Proxy

All information about sensor status is accessible with mobile application (over BLE) or through Efento Cloud
All information about sensor status is accessible with mobile application (over BLE) or though web panel

Device is equipped with LEDs indicating its operating status

Enclosure material: ABS

Size: 27 x 71 x 71 mm, 100 g

Probes length (for sensor with probes only): by default 1 meter, other lengths are available on request

Operating range: -35°C to +70°C

Mounting: velcro (included), double side adhesive tape with acrylic glue or 2 x M3 screws
Enclosure material: ABS

Size: 110 x 80 x 25 mm

Weight: 95 g

Operating range: 0… 40°C, 10… 90% RH Indoor use only

Mounting: tabletop or 2 x M3 screws


2 years
2 years


Order a starter kit - $197 only

The offer is dedicated to companies only.

Check it yourself. The starter kit includes all you need to test Efento wireless sensors and Efento Cloud platform:
- Efento Gateway
- Bluetooth Low Energy temperature and humidity sensor
- Efento Cloud access
- Free shipping worldwide

Our customers