# Installation best practices

Efento Bluetooth Low Energy (BLE) loggers are designed to provide reliable wireless communication and accurate environmental measurements. Proper installation is essential to ensure optimal performance, measurement precision, and long-term durability. **The following best practices apply to all Efento BLE loggers and models**.

## **Ensuring the best possible BLE coverage**

### **Choose optimal** logger **placement**

* Install loggers in locations with a clear path to the receiving device (smartphone, Efento Gateway, or custom hardware).
* Avoid placing loggers behind metal objects, inside metal cabinets, or in locations with thick reinforced concrete walls - these significantly weaken BLE signal strength.
* For best performance, mount loggers at least:
  * **1–2 meters above the floor**
  * **30 cm away from large metal surfaces**
  * **1 meter away from other radio-emitting devices** (Wi-Fi routers, industrial machinery, etc.), when possible.

### **Consider the environment**

* Install loggers in areas with minimal radio interference (Wi-Fi, industrial motors, dense IoT networks).
* In long corridors or large spaces, maintain a clear line of sight between loggers and gateways where possible.

### **Use additional gateways when needed**

* For large buildings, multi-room layouts, or areas with heavy structural shielding:
  * Install additional Efento Gateways to ensure seamless coverage.
  * Position gateways centrally relative to logger groups for balanced signal distribution.

## **Ensuring valid environmental measurements**

### **Avoid direct influence from heat or cooling sources**

To obtain accurate measurements, loggers **must not** be installed directly next to:

* heaters, radiators, air vents, or HVAC outlets
* doors, windows, or drafty areas
* direct sunlight or artificial heat sources (monitors, lamps)

Maintain a **minimum distance of 0.5–1 m** from such sources.

### **Consider airflow and** logger **exposure**

* Ensure good, natural airflow around the logger - do not block vents or fully enclose the device.
* Avoid locations where the logger may be affected by localized microclimates, such as corners, high shelves, or behind heavy equipment.

### **Mount** loggers **securely**

* Use proper mounting accessories (screws / adhesive pads / cable ties) to prevent the logger from falling or shifting position, which may affect measurement stability.


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