ESP-Now Range Test: Real-World Results for ESP32 Devices!

Introduction

This tutorial explores the range capabilities of ESP-Now on ESP32 devices, inspired by a real-world testing scenario. By following these steps, you'll learn how to set up a mobile logging system to accurately measure the range and performance of ESP-Now, whether in standard or long-range mode.

Step 1: Gather Required Components

To conduct the ESP-Now range test, you will need the following components:

• ESP32 TinyPico: A compact ESP32 board for your project.
• GPS Module: To log your location as you test the range.
• ESP32 TTGO Display: Optional, for real-time monitoring.
• SD Card: For storing the logged ESP-Now packets.

You can find the components at the following links:

• ESP32 TinyPico
• GPS Module
• ESP32 TTGO Display
• SD Card

Step 2: Set Up the Hardware

1. Connect the GPS Module to the ESP32:

   • Use appropriate wiring: ensure power, ground, and data lines are properly connected.

2. Attach the SD Card for data storage:

   • Connect the SD card module to the ESP32, ensuring correct pin connections.

3. Optional: If using the TTGO Display, connect it following the manufacturer's instructions.

Step 3: Install the Required Software

1. Download the Code from the GitHub repository:

   https://github.com/atomic14/esp-now-range-test
   

2. Set Up Arduino IDE:

   • Install the ESP32 board definitions if you haven’t done so already.
   • Open the downloaded code in the Arduino IDE.

3. Modify the Code (if necessary):

   • Ensure your pin configurations match your hardware setup.
   • Adjust any parameters based on your testing needs.

Step 4: Conduct the Range Test

1. Upload the Code to both ESP32 devices.

2. Position the Devices:

   • Place one ESP32 in a fixed location and take the second one with you as you walk.

3. Start Walking:

   • Begin walking away from the fixed ESP32 device while monitoring the GPS data and the status of ESP-Now packets.

4. Switch Operating Modes:

   • Test both "Standard" and "Long Range" modes:
     • In Standard Mode, expect a range of approximately 320m.
     • In Long Range Mode, you can achieve up to 500m by trading off bandwidth.

Step 5: Record and Analyze Data

1. Monitor Your Distance:

   • Use the GPS data logged on the SD card to track how far you are from the stationary ESP32.

2. Review the Logged Packets:

   • After completing your walk, check the SD card for ESP-Now packet logs.
   • Analyze the data to determine successful packet transmission ranges.

Conclusion

In this tutorial, you learned how to set up and conduct a real-world range test for ESP-Now using ESP32 devices. By gathering the right components, setting up your hardware, and carefully monitoring your results, you can effectively measure the capabilities of ESP-Now. Consider experimenting further by testing in various environments to see how real-world conditions affect the range. Happy testing!