main.cpp

Go to the documentation of this file.

#include <Arduino.h>
#include <ETH.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
#include <SPI.h>
#include <WiFi.h>
 
#define ETH_CLK_PIN 7
#define ETH_MISO_PIN 41
#define ETH_MOSI_PIN 13
#define ETH_CS_PIN 6
#define ETH_PHY_ADDR 0
 
IPAddress staticIP(192, 168, 2, 100);
IPAddress gateway(192, 168, 2, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress dns(192, 168, 2, 1);
IPAddress receiverIP(192, 168, 2, 1);
const int receiverPort = 5006;
EthernetUDP udp;
 
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
 
void setup() {
    Serial.begin(115200);
    Serial.println("Minimal UDP Sender");
    SPI.begin(ETH_CLK_PIN, ETH_MISO_PIN, ETH_MOSI_PIN, ETH_CS_PIN);
    delay(1000);
    // Ethernet.config(staticIP, gateway, subnet, dns);
    Ethernet.init(ETH_CS_PIN);
    delay(1000);
 
    Ethernet.begin(mac, staticIP, dns, gateway, subnet);
    delay(1000);
 
    Serial.println("ESP32 IP: ");
    Serial.println(Ethernet.localIP());
    udp.begin(5005);  // Local port for sending
}
 
void loop() {
    String sensorValue = "Example data: " + String(random(0, 100));
    unsigned long timestamp = millis();
    String dataToSend =
        sensorValue + ", Timestamp: " + String(timestamp) + "\n";
    int dataLength = dataToSend.length();
    char dataBuffer[dataLength + 1];
    dataToSend.toCharArray(dataBuffer, dataLength + 1);
 
    udp.beginPacket(receiverIP, receiverPort);
    udp.write(dataBuffer, dataLength);
    udp.endPacket();
 
    Serial.print("Sent (UDP): ");
    Serial.print(dataToSend);
    delay(1000);  // Adjust streaming rate
}