Ich zeige mit einem Arduino UNO und einem Ethernet Shield Sensordaten auf einem Webserver an. Mit folgendem Code:
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
* Ethernet shield attached to pins 10, 11, 12, 13
* Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
float zahl1 = 1023, zahl2 = 100, zahl3 = 1.6;
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 20, 60);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer Example");
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of each analog input pin
int analogWert1 = analogRead(A1);
float TemperaturVorlauf = analogWert1 / zahl1 * zahl2;
int analogWert2 = analogRead(A2);
float TemperaturRucklauf = analogWert2 / zahl1 * zahl2;
int analogWert3 = analogRead(A3);
float Druckdifferenz = analogWert3 / zahl1 * zahl3;
client.println("Vorlauf");
client.println("<br>");
client.print("Analoger Wert = ");
client.println(analogWert1);
client.println("<br>");
client.print("Temperatur = ");
client.print(TemperaturVorlauf);
client.println(" Grad Celsius");
client.println("<br>");
client.println("--------------------------");
client.println("<br>");
client.println("Ruecklauf");
client.println("<br>");
client.print("Analoger Wert = ");
client.println(analogWert2);
client.println("<br>");
client.print("Temperatur = ");
client.print(TemperaturRucklauf);
client.println(" Grad Celsius");
client.println("<br>");
client.println("--------------------------");
client.println("<br>");
client.println("Druckdifferenz");
client.println("<br>");
client.print("Analoger Wert = ");
client.println(analogWert3);
client.println("<br>");
client.print("Druck = ");
client.print(Druckdifferenz);
client.println(" Bar");
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
Welches ist die einfachste Möglichkeit, diese Daten zu sammeln?
Ich brauche nicht sehr viele Daten, ich möchte sie nur einmal pro Woche erfassen.
