Hello
I use Arduino Uno + SHT11, I get the correct of tempture and humidity.
Arduino Uno http://arduino.cc/en/Main/ArduinoBoardUno
Wifi Shield http://arduino.cc/en/Main/ArduinoWiFiShield
SHT11 Sensor datasheet
When I use Arduino Uno + Wifi shield + SHT11, I always get the wrong of tempture and humidity.
It always print 0.00000000
This is code:
#include <SHT1x.h>
#include <SPI.h>
#include <WiFi.h>
float temp;
char ssid[] = "AAA"; // your network SSID (name)
char pass[] = "11111111"; // your network password
int keyIndex = 8; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(80);
WiFiClient client = server.available(); // listen for incoming clients
#define dataPin 10
#define clockPin 11
SHT1x sht1x(dataPin, clockPin);
unsigned long before,after;
void setup() {
Serial.begin(9600); // initialize serial communication
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while(true); // don't continue
}
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to Network named: ");
Serial.println(ssid); // print the network name (SSID);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(3000);
}
before=millis();
server.begin(); // start the web server on port 80
printWifiStatus(); // you're connected now, so print out the status
}
void loop() {
after=millis();
if(after-before>3000)
{
sec30=millis();
temp = sht1x.readTemperatureC();
}
client = server.available();
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html;charset=UTF-8");
client.println();
client.print("");
client.print("
client.print("");
client.print("");
client.print("");
client.print("
| "); client.print(temp,DEC); Serial.println(temp,DEC); client.print(" |
client.print("");
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
}
else { // if you got a newline, then clear currentLine:
currentLine = "";
}
}
else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
}
}
// close the connection:
client.stop();
Serial.println("client disonnected");
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}