# Beacon Distance Calculator

Measured Power (Tx Power):

Distance (meters):

The Beacon Distance Calculator is a tool used to estimate the distance between a receiver and a beacon device based on the received signal strength indicator (RSSI) and the known transmitted power (Tx Power) of the beacon.

## Formula

To determine the distance ddd in meters, the calculator uses the formula: d=10P−R10⋅nd = 10^{\frac{P – R}{10 \cdot n}}d=1010⋅nP−R​ where:

• ddd is the distance in meters.
• PPP is the measured power (Tx Power).
• RRR is the signal strength (RSSI).
• nnn is the path loss exponent (assumed constant, typically around 2 for free space).

## How to Use

Follow these steps to use the Beacon Distance Calculator:

1. Enter the Signal Strength (RSSI) value in dBm.
2. Enter the Measured Power (Tx Power) of the beacon in dBm.
3. Click the “Calculate” button.
4. The estimated distance between the receiver and the beacon will be displayed in meters.

## Example

Suppose the RSSI value is -70 dBm and the Tx Power is -55 dBm. Using the calculator:

1. Enter -70 in the Signal Strength (RSSI) field.
2. Enter -55 in the Measured Power (Tx Power) field.
3. Click “Calculate.”
4. The estimated distance will be approximately 17.78 meters.

## FAQs

1. What is RSSI in beacon technology?
• RSSI (Received Signal Strength Indicator) is a measure of the power level of the signal received from a beacon.
2. What is Tx Power?
• Tx Power (Transmit Power) is the power level at which the beacon transmits its signal.
3. Why is knowing beacon distance important?
• Knowing the distance helps in proximity-based applications like indoor navigation, asset tracking, and location-based services.
4. Is the calculated distance always accurate?
• The calculated distance provides an estimation based on signal strength and path loss assumptions. Actual distances may vary due to environmental factors.
5. Can I use this calculator for any beacon technology?
• Yes, this calculator can be used for any beacon technology that uses RSSI and Tx Power for distance estimation.
6. What is the path loss exponent (n) and how is it determined?
• The path loss exponent nnn represents the rate at which the signal strength decreases with distance. It is determined based on the propagation environment and can vary.
7. Can beacon distance be affected by obstacles or interference?
• Yes, obstacles, interference, and environmental conditions can affect signal propagation and thus the calculated distance.
8. Is there a standard value for the path loss exponent (n)?
• The path loss exponent varies depending on the environment. It is typically assumed to be around 2 for free space, but can be higher or lower in different scenarios.
9. What units are used for RSSI and Tx Power in this calculator?
• Both RSSI and Tx Power are measured in decibels relative to milliwatts (dBm).
10. How can I improve the accuracy of distance estimation with this calculator?
• To improve accuracy, ensure that RSSI and Tx Power values are measured accurately and consider adjusting the path loss exponent nnn based on your environment.

## Conclusion

The Beacon Distance Calculator simplifies the estimation of distance between a receiver and a beacon using basic signal strength metrics. By understanding the inputs and limitations, users can effectively leverage this tool for various proximity-based applications in wireless communication and IoT deployments.