Used:<\/p>\n
Connect Sensor-Pin1 to +5V
\nConnect Sensor-Pin2 to Digital In 2
\nConnect Sensor-Pin4 to GND
\nConnect Sensor-Pin1 with a 10K resistor to Sensor-Pin2<\/p>\n
Programm Used<\/a> (Combination of WebServer and DHT Example):<\/p>\n A simple web server that shows the value of the analog input pins. Circuit: created 18 Dec 2009 *\/<\/p>\n #include \/\/ Example testing sketch for various DHT humidity\/temperature sensors #include \"DHT.h\"<\/p>\n #define DHTPIN 2 \/\/ what pin we're connected to<\/p>\n \/\/ Uncomment whatever type you're using! \/\/ Connect pin 1 (on the left) of the sensor to +5V DHT dht(DHTPIN, DHTTYPE);<\/p>\n \/\/ Enter a MAC address and IP address for your controller below. \/\/ Initialize the Ethernet server library \/\/ Request void setup() { \/\/ Serial.begin(9600); \/\/ Request \/\/ DHT void WEBloop() \/\/ output the value of each analog input pin \/\/ Reading temperature or humidity takes about 250 milliseconds! \/\/ check if returns are valid, if they are NaN (not a number) then something went wrong! break; void loop() {<\/p>\n \/\/DHTloop(); }<\/p>\n void DHTloop() { \/\/ check if returns are valid, if they are NaN (not a number) then something went wrong! Used: Arduino Duemilanove Arduino Ethernet Shield DHT22 Sensor DHT-sensor-library DHT Example Connect Sensor-Pin1 to +5V Connect Sensor-Pin2 to Digital In 2 Connect Sensor-Pin4 to GND Connect Sensor-Pin1 with a 10K resistor to Sensor-Pin2 Programm Used (Combination of WebServer and DHT … Continue reading \/*
\n Web Server<\/p>\n
\n using an Arduino Wiznet Ethernet shield. <\/p>\n
\n * Ethernet shield attached to pins 10, 11, 12, 13
\n * Analog inputs attached to pins A0 through A5 (optional)<\/p>\n
\n by David A. Mellis
\n modified 4 Sep 2010
\n by Tom Igoe<\/p>\n
\n#include
\n\/\/ Written by ladyada, public domain<\/p>\n
\n\/\/#define DHTTYPE DHT11 \/\/ DHT 11
\n#define DHTTYPE DHT22 \/\/ DHT 22 (AM2302)
\n\/\/#define DHTTYPE DHT21 \/\/ DHT 21 (AM2301)<\/p>\n
\n\/\/ Connect pin 2 of the sensor to whatever your DHTPIN is
\n\/\/ Connect pin 4 (on the right) of the sensor to GROUND
\n\/\/ Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor<\/p>\n
\n\/\/ The IP address will be dependent on your local network:
\nbyte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
\nIPAddress ip(192,168,1, 177);<\/p>\n
\n\/\/ with the IP address and port you want to use
\n\/\/ (port 80 is default for HTTP):
\nEthernetServer server(80);<\/p>\n
\nint Request; \/\/ any function will see this variable<\/p>\n
\n \/\/ start the Ethernet connection and the server:
\n Ethernet.begin(mac, ip);
\n server.begin();<\/p>\n
\n\/\/ Serial.println(\"DHTxx test!\");<\/p>\n
\n Request = 0;<\/p>\n
\n dht.begin();
\n}<\/p>\n
\n{
\n \/\/ listen for incoming clients
\n EthernetClient client = server.available();
\n if (client) {
\n \/\/ an http request ends with a blank line
\n boolean currentLineIsBlank = true;
\n while (client.connected()) {
\n if (client.available()) {
\n char c = client.read();
\n \/\/ if you've gotten to the end of the line (received a newline
\n \/\/ character) and the line is blank, the http request has ended,
\n \/\/ so you can send a reply
\n if (c == '\\n' && currentLineIsBlank) {
\n \/\/ send a standard http response header
\n client.println(\"HTTP\/1.1 200 OK\");
\n client.println(\"Content-Type: text\/html\");
\n client.println();<\/p>\n
\n \/\/for (int analogChannel = 0; analogChannel < 6; analogChannel++) {\n \/\/client.print(\"analog input \");\n \/\/client.print(analogChannel);\n \/\/client.print(\" is \");\n \/\/client.print(analogRead(analogChannel));\n \/\/client.println(\"
\");
\n \/\/}<\/p>\n
\n \/\/ Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
\n float h = dht.readHumidity();
\n float t = dht.readTemperature();<\/p>\n
\n if (isnan(t) || isnan(h)) {
\n\/\/ Serial.println(\"Failed to read from DHT\");
\n \/\/
\n client.print(\"Failed to read from DHT\");
\n client.println(\"
\");
\n } else {
\n\/\/ Serial.print(\"Humidity: \");
\n\/\/ Serial.print(h);
\n\/\/ Serial.print(\" %\\t\");
\n\/\/ Serial.print(\"Temperature: \");
\n\/\/ Serial.print(t);
\n\/\/ Serial.println(\" *C\");
\n \/\/
\n client.print(\"Request: \");
\n \/\/client.println(random(1000));
\n Request = Request + 1;
\n client.println(Request);
\n \/\/
\n client.print(\"Humidity: \");
\n client.print(h);
\n client.print(\" %\\t\");
\n client.print(\"Temperature: \");
\n client.print(t);
\n client.println(\" *C\");
\n client.println(\"
\");
\n } <\/p>\n
\n }
\n if (c == '\\n') {
\n \/\/ you're starting a new line
\n currentLineIsBlank = true;
\n }
\n else if (c != '\\r') {
\n \/\/ you've gotten a character on the current line
\n currentLineIsBlank = false;
\n }
\n }
\n }
\n \/\/ give the web browser time to receive the data
\n delay(1);
\n \/\/ close the connection:
\n client.stop();
\n }
\n}<\/p>\n
\n WEBloop();<\/p>\n
\n \/\/ Reading temperature or humidity takes about 250 milliseconds!
\n \/\/ Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
\n float h = dht.readHumidity();
\n float t = dht.readTemperature();<\/p>\n
\n if (isnan(t) || isnan(h)) {
\n Serial.println(\"Failed to read from DHT\");
\n } else {
\n Serial.print(\"Humidity: \");
\n Serial.print(h);
\n Serial.print(\" %\\t\");
\n Serial.print(\"Temperature: \");
\n Serial.print(t);
\n Serial.println(\" *C\");
\n }
\n}<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"