CHESTER BLE Tag Subsystem

The Chester platform includes a dedicated Teltonika EYE Sensor subsystem, enabling seamless integration with up to eight Bluetooth tags for monitoring temperature and humidity.
This subsystem provides reliable wireless environmental sensing for a wide range of applications.

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1. Activating the Subsystem

To activate the Teltonika EYE Sensor subsystem, run the following command:

tag config enabled true

After enabling the subsystem, save the configuration and restart CHESTER to apply the change:

config save

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2. Tag Activation

info

The packaged sensor should come activated.
If it is not active, touch a magnet to the sensor to wake it from hibernation mode, as shown in the image below.

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3. Enrolling Tags

Before the sensors can be used, they must first be enrolled by the device.

To enroll a tag:

1. Place the tag close to CHESTER.
2. Run the command below and wait up to 10 seconds for discovery.

tag enroll

You can also define an optional signal strength threshold (from -128 to 0 dBm) to control enrollment sensitivity.
Lower values (e.g. -128 dBm) provide greater range, while higher values (e.g. -40 dBm, the default) are stricter.

tag enroll <threshold>

Once enrollment is complete, make it persistent by saving the configuration:

config save

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4. Configuring via EYE App

The tags can be configured using the Teltonika EYE App.
We strongly recommend updating the firmware, as the default version does not allow some advanced settings.

How to Configure

1. Open the EYE App and select the device from the list.
2. Tap the CONFIGURE button to open the device settings screen.
3. Adjust the configuration options as needed.
   (Note: The Android app provides more detailed information such as device name, address, and serial number. The iOS version is more limited.)

Teltonika EYE App — Device Overview

Recommended Configuration

The following configuration is recommended for optimal communication performance and power efficiency when using Teltonika EYE Sensors with the CHESTER BLE Tag Subsystem. This setup ensures stable data transmission, adequate advertising frequency for reliable sensor discovery, and balanced power consumption.

Teltonika EYE App — Device Configuration

Configuration Settings Table

Setting	Value
Power signal settings	4 dBm
Advertising interval	10 s
Packet settings	Sensors
Active sensors	Temperature, Humidity

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5. Signal Testing

The effective communication range between CHESTER and the Teltonika sensors depends on the signal power configuration of the tag.

To test the signal strength, run:

tag read

Check the RSSI value in the output:

• If the signal is lower than -85 dBm, consider increasing the tag’s power level for better stability.

6. Measured Parameters

Measured Quantity	Description
Temperature	Ambient temperature of the sensor’s environment.
Humidity	Relative humidity of the surrounding air.
Movement / Accelerometer	Detects motion, changes in orientation (pitch/roll) of the device.
Magnet Detection	Detects magnetic field changes — e.g., door open/close via magnet.
Battery Voltage / Level	Monitors the internal battery’s voltage (to estimate remaining life).

tip

If you need additional help or a visual walkthrough, check out the
Video Guide.