How to Use ESP32-P4-WIFI6-POE-ETH: Examples, Pinouts, and Specs

The ESP32-P4-WIFI6-POE-ETH is a high-performance microcontroller module manufactured by Waveshare. It is designed for advanced IoT applications, offering integrated Wi-Fi 6 and Ethernet capabilities. The module also supports Power over Ethernet (PoE), enabling both power and data transmission over a single Ethernet cable, which simplifies deployment and reduces wiring complexity.

This component is ideal for applications requiring high-speed connectivity, low power consumption, and robust network performance. Common use cases include smart home devices, industrial automation, remote monitoring systems, and edge computing.

Below are the key technical details of the ESP32-P4-WIFI6-POE-ETH:

The ESP32-P4-WIFI6-POE-ETH features a 40-pin layout. Below is the pin configuration:

1. Powering the Module:

   • Use a PoE-enabled Ethernet switch or injector to power the module via the Ethernet port.
   • Alternatively, supply 5V through the USB-C port for non-PoE applications.

2. Connecting to Wi-Fi:

   • Configure the Wi-Fi settings in your firmware to connect to a Wi-Fi 6 network.
   • Ensure the network supports 802.11ax for optimal performance.

3. Using Ethernet:

   • Connect the Ethernet port to a router or switch using a standard Ethernet cable.
   • Ensure the Ethernet pins (ETH_TX+, ETH_TX-, ETH_RX+, ETH_RX-) are properly connected if using custom wiring.

4. Programming the Module:

   • Use the USB-C port to connect the module to a computer for programming.
   • Install the necessary drivers and use the Arduino IDE or ESP-IDF for development.

5. GPIO Usage:

   • Configure GPIO pins as input or output in your firmware.
   • Avoid exceeding the 3.3V logic level to prevent damage.

Below is an example of how to connect the ESP32-P4-WIFI6-POE-ETH to an Arduino UNO for basic Wi-Fi functionality:

#include <WiFi.h> // Include the Wi-Fi library for ESP32

// Replace with your network credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

void setup() {
  Serial.begin(115200); // Initialize serial communication at 115200 baud
  delay(1000); // Wait for a second to stabilize

  // Connect to Wi-Fi
  Serial.println("Connecting to Wi-Fi...");
  WiFi.begin(ssid, password);

  // Wait until connected
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWi-Fi connected!");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP()); // Print the assigned IP address
}

void loop() {
  // Add your main code here
}

• Ensure the PoE switch or injector complies with IEEE 802.3af/at standards.
• Use proper grounding to avoid electrical noise and interference.
• Avoid exposing the module to extreme temperatures or humidity.
• Use decoupling capacitors on power lines to stabilize voltage.

1. Wi-Fi Connection Fails:

   • Ensure the SSID and password are correct.
   • Check if the Wi-Fi network supports 802.11ax.
   • Verify that the module is within range of the Wi-Fi router.

2. Ethernet Not Working:

   • Confirm that the Ethernet cable is securely connected.
   • Check the PoE switch or injector for proper power delivery.
   • Verify the Ethernet pins are correctly wired if using custom connections.

3. Module Not Powering On:

   • Ensure the PoE switch or injector is IEEE 802.3af/at compliant.
   • Check the USB cable and power source if using USB-C.

4. GPIO Pins Not Responding:

   • Verify the pin configuration in your firmware.
   • Ensure the GPIO voltage does not exceed 3.3V.

Q: Can I use this module without PoE?
A: Yes, you can power the module via the USB-C port using a 5V power source.

Q: Does the module support Bluetooth?
A: No, the ESP32-P4-WIFI6-POE-ETH is focused on Wi-Fi 6 and Ethernet connectivity.

Q: What development environments are supported?
A: The module supports the Arduino IDE and ESP-IDF for firmware development.

Q: Can I use this module for outdoor applications?
A: Yes, but ensure it is housed in a weatherproof enclosure to protect it from environmental factors.