ESP32 ESP-NOW Range Test

This project evaluates the real-world communication range of Espressif's ESP-NOW protocol using ESP32-S3 modules. It demonstrates bidirectional communication, RSSI monitoring, and visual feedback via onboard RGB LEDs.

📡 What is ESP-NOW?

ESP-NOW is a lightweight, connectionless wireless communication protocol developed by Espressif. It allows multiple ESP32 devices to communicate directly without a Wi-Fi router, enabling ultra-low-latency and low-power data exchange. ESP-NOW supports one-to-one, one-to-many, and many-to-many topologies, making it ideal for remote control, sensor networks, and smart home applications.

🎯 Project Goals

• Measure the maximum reliable communication range between two ESP32-S3 boards using ESP-NOW.
• Implement bidirectional data exchange with acknowledgment.
• Monitor signal strength (RSSI) for each received packet.
• Provide visual feedback using onboard RGB LEDs:
  • Master: Red LED indicates data transmission.
  • Slave: Green LED indicates data reception.

🔧 Hardware Requirements

• 2× ESP32-S3 development boards (e.g., ESP32-S3-DevKitC-1)
• Onboard RGB LED connected to GPIO38 (common on many ESP32-S3 boards)
• USB cables for programming and power
• Optional: External antennas for extended range testing

🛠️ Software Setup

• Arduino IDE with ESP32 board support installed
• ESP32 Board Package version 2.0.0 or later
• No additional libraries required; utilizes built-in ESP-NOW and Wi-Fi libraries

🚀 Getting Started

1. Clone the Repository:

   git clone https://github.com/SleXx88/esp32-espnow-range-test.git