mpfeil/wifi_webserver_sdcard.ino

## wifi_webserver_sdcard.ino
/*
  WiFi Web Server Read SD Card

 A simple web server that reads data from a SD card and displays
 it.

 This example combines the following Arduino examples and is
 for a senseBox:edu with WiFi and SDCard Bee.

 https://www.arduino.cc/en/Tutorial/Wifi101WiFiWebServer
 https://www.arduino.cc/en/Tutorial/ReadWrite

 */

#include <SPI.h>
#include <WiFi101.h>
#include <SD.h>
#include "SenseBoxMCU.h"


//#include "arduino_secrets.h"
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = "DEINE_SSID";        // your network SSID (name)
char pass[] = "DEIN_PASSWORD";    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                 // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;

WiFiServer server(80);

File myFile;
// Name der Datei auf der SD-Karte
// Achte darauf, dass dieser Name (ohne Dateiendung) nicht länger als 8 Buchstaben lang sein darf!
String fileName = "SenseBox.txt";

void setup() {
  //Initialize serial and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // check for the presence of the shield:
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue:
    while (true);
  }

  // attempt to connect to WiFi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(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(10000);
  }
  server.begin();

  // you're connected now, so print out the status:
  printWiFiStatus();

  Serial.print("Initializing SD card...");

  if (!SD.begin(28)) {
    Serial.println("initialization failed!");
    while (1);
  }
  Serial.println("initialization done.");

  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.
  myFile = SD.open(fileName, FILE_WRITE);

  // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to test.txt...");
    myFile.println("testing 1, 2, 3.");
    // close the file:
    myFile.close();
    Serial.println("done.");
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }
}


void loop() {
  // listen for incoming clients
  WiFiClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    bool currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        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

          myFile = SD.open(fileName);
          if (myFile) {

            while (myFile.available()) {
              client.write(myFile.read());
            }

            client.println("<br />");

            myFile.close();
          } else {
            client.print("error opening file from SD Card");
            client.println("</br>");
          }

          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");
  }
}


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");
}
	/*
	WiFi Web Server Read SD Card

	A simple web server that reads data from a SD card and displays
	it.

	This example combines the following Arduino examples and is
	for a senseBox:edu with WiFi and SDCard Bee.

	https://www.arduino.cc/en/Tutorial/Wifi101WiFiWebServer
	https://www.arduino.cc/en/Tutorial/ReadWrite

	*/

	#include <SPI.h>
	#include <WiFi101.h>
	#include <SD.h>
	#include "SenseBoxMCU.h"


	//#include "arduino_secrets.h"
	///////please enter your sensitive data in the Secret tab/arduino_secrets.h
	char ssid[] = "DEINE_SSID"; // your network SSID (name)
	char pass[] = "DEIN_PASSWORD"; // your network password (use for WPA, or use as key for WEP)
	int keyIndex = 0; // your network key Index number (needed only for WEP)

	int status = WL_IDLE_STATUS;

	WiFiServer server(80);

	File myFile;
	// Name der Datei auf der SD-Karte
	// Achte darauf, dass dieser Name (ohne Dateiendung) nicht länger als 8 Buchstaben lang sein darf!
	String fileName = "SenseBox.txt";

	void setup() {
	//Initialize serial and wait for port to open:
	Serial.begin(9600);
	while (!Serial) {
	; // wait for serial port to connect. Needed for native USB port only
	}

	// check for the presence of the shield:
	if (WiFi.status() == WL_NO_SHIELD) {
	Serial.println("WiFi shield not present");
	// don't continue:
	while (true);
	}

	// attempt to connect to WiFi network:
	while (status != WL_CONNECTED) {
	Serial.print("Attempting to connect to SSID: ");
	Serial.println(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(10000);
	}
	server.begin();

	// you're connected now, so print out the status:
	printWiFiStatus();

	Serial.print("Initializing SD card...");

	if (!SD.begin(28)) {
	Serial.println("initialization failed!");
	while (1);
	}
	Serial.println("initialization done.");

	// open the file. note that only one file can be open at a time,
	// so you have to close this one before opening another.
	myFile = SD.open(fileName, FILE_WRITE);

	// if the file opened okay, write to it:
	if (myFile) {
	Serial.print("Writing to test.txt...");
	myFile.println("testing 1, 2, 3.");
	// close the file:
	myFile.close();
	Serial.println("done.");
	} else {
	// if the file didn't open, print an error:
	Serial.println("error opening test.txt");
	}
	}


	void loop() {
	// listen for incoming clients
	WiFiClient client = server.available();
	if (client) {
	Serial.println("new client");
	// an http request ends with a blank line
	bool currentLineIsBlank = true;
	while (client.connected()) {
	if (client.available()) {
	char c = client.read();
	Serial.write(c);
	// if you've gotten to the end of the line (received a newline
	// character) and the line is blank, the http request has ended,
	// so you can send a reply
	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

	myFile = SD.open(fileName);
	if (myFile) {

	while (myFile.available()) {
	client.write(myFile.read());
	}

	client.println("<br />");

	myFile.close();
	} else {
	client.print("error opening file from SD Card");
	client.println("</br>");
	}

	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");
	}
	}


	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");
	}