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-/*
- Temperature web interface
-
- This example shows how to serve data from an analog input
- via the Arduino Yún's built-in webserver using the Bridge library.
-
- The circuit:
- * TMP36 temperature sensor on analog pin A1
- * SD card attached to SD card slot of the Arduino Yún
-
- Prepare your SD card with an empty folder in the SD root
- named "arduino" and a subfolder of that named "www".
- This will ensure that the Yún will create a link
- to the SD to the "/mnt/sd" path.
-
- In this sketch folder is a basic webpage and a copy of zepto.js, a
- minimized version of jQuery. When you upload your sketch, these files
- will be placed in the /arduino/www/TemperatureWebPanel folder on your SD card.
-
- You can then go to http://arduino.local/sd/TemperatureWebPanel
- to see the output of this sketch.
-
- You can remove the SD card while the Linux and the
- sketch are running but be careful not to remove it while
- the system is writing to it.
-
- created 6 July 2013
- by Tom Igoe
-
-
- This example code is in the public domain.
-
- */
-#include <Bridge.h>
-#include <YunServer.h>
-#include <YunClient.h>
-
-// Listen on default port 5555, the webserver on the Yun
-// will forward there all the HTTP requests for us.
-YunServer server;
-String startString;
-long hits = 0;
-
-void setup() {
- Serial.begin(9600);
-
- // Bridge startup
- pinMode(13,OUTPUT);
- digitalWrite(13, LOW);
- Bridge.begin();
- digitalWrite(13, HIGH);
-
- // using A0 and A2 as vcc and gnd for the TMP36 sensor:
- pinMode(A0, OUTPUT);
- pinMode(A2, OUTPUT);
- digitalWrite(A0, HIGH);
- digitalWrite(A2, LOW);
-
- // Listen for incoming connection only from localhost
- // (no one from the external network could connect)
- server.listenOnLocalhost();
- server.begin();
-
- // get the time that this sketch started:
- Process startTime;
- startTime.runShellCommand("date");
- while(startTime.available()) {
- char c = startTime.read();
- startString += c;
- }
-}
-
-void loop() {
- // Get clients coming from server
- YunClient client = server.accept();
-
- // There is a new client?
- if (client) {
- // read the command
- String command = client.readString();
- command.trim(); //kill whitespace
- Serial.println(command);
- // is "temperature" command?
- if (command == "temperature") {
-
- // get the time from the server:
- Process time;
- time.runShellCommand("date");
- String timeString = "";
- while(time.available()) {
- char c = time.read();
- timeString += c;
- }
- Serial.println(timeString);
- int sensorValue = analogRead(A1);
- // convert the reading to millivolts:
- float voltage = sensorValue * (5000/ 1024);
- // convert the millivolts to temperature celsius:
- float temperature = (voltage - 500)/10;
- // print the temperature:
- client.print("Current time on the Yún: ");
- client.println(timeString);
- client.print("<br>Current temperature: ");
- client.print(temperature);
- client.print(" degrees C");
- client.print("<br>This sketch has been running since ");
- client.print(startString);
- client.print("<br>Hits so far: ");
- client.print(hits);
- }
-
- // Close connection and free resources.
- client.stop();
- hits++;
- }
-
- delay(50); // Poll every 50ms
-}
-
-
-