Instalación y programación.

Con esta aplicación podemos conocer el valor de 4 entradas analógicas, 3 digitales y activar 4 salidas digitales; con Arduino UNO y la placa de conexión a Ethernet W5100, desde cualquier equipo conectado a Internet.

La parte primera del programa hay que cargarla en el Arduino UNO y la segunda parte en la tarjeta microSD que lleva el módulo W5100.

La página Web será la siguiente:

marcha2

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ 60

// MAC address from Ethernet shield sticker under board
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 15); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80
File webFile; // the web page file on the SD card
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0; // index into HTTP_req buffer
boolean LED_state[4] = {0}; // stores the states of the LEDs

void setup()
{
 // disable Ethernet chip
 pinMode(10, OUTPUT);
 digitalWrite(10, HIGH);
 
 Serial.begin(9600); // for debugging
 
 // initialize SD card
 Serial.println("Initializing SD card...");
 if (!SD.begin(4)) {
 Serial.println("ERROR - SD card initialization failed!");
 return; // init failed
 }
 Serial.println("SUCCESS - SD card initialized.");
 // check for index.htm file
 if (!SD.exists("index.htm")) {
 Serial.println("ERROR - Can't find index.htm file!");
 return; // can't find index file
 }
 Serial.println("SUCCESS - Found index.htm file.");
 // switches on pins 2, 3 and 5
 pinMode(2, INPUT);
 pinMode(3, INPUT);
 pinMode(5, INPUT);
 // LEDs
 pinMode(6, OUTPUT);
 pinMode(7, OUTPUT);
 pinMode(8, OUTPUT);
 pinMode(9, OUTPUT);
 
 Ethernet.begin(mac, ip); // initialize Ethernet device
 server.begin(); // start to listen for clients
}

void loop()
{
 EthernetClient client = server.available(); // try to get client

 if (client) { // got client?
 boolean currentLineIsBlank = true;
 while (client.connected()) {
 if (client.available()) { // client data available to read
 char c = client.read(); // read 1 byte (character) from client
 // limit the size of the stored received HTTP request
 // buffer first part of HTTP request in HTTP_req array (string)
 // leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
 if (req_index < (REQ_BUF_SZ - 1)) {
 HTTP_req[req_index] = c; // save HTTP request character
 req_index++;
 }
 // last line of client request is blank and ends with \n
 // respond to client only after last line received
 if (c == '\n' && currentLineIsBlank) {
 // send a standard http response header
 client.println("HTTP/1.1 200 OK");
 // remainder of header follows below, depending on if
 // web page or XML page is requested
 // Ajax request - send XML file
 if (StrContains(HTTP_req, "ajax_inputs")) {
 // send rest of HTTP header
 client.println("Content-Type: text/xml");
 client.println("Connection: keep-alive");
 client.println();
 SetLEDs();
 // send XML file containing input states
 XML_response(client);
 }
 else { // web page request
 // send rest of HTTP header
 client.println("Content-Type: text/html");
 client.println("Connection: keep-alive");
 client.println();
 // send web page
 webFile = SD.open("index.htm"); // open web page file
 if (webFile) {
 while(webFile.available()) {
 client.write(webFile.read()); // send web page to client
 }
 webFile.close();
 }
 }
 // display received HTTP request on serial port
 Serial.print(HTTP_req);
 // reset buffer index and all buffer elements to 0
 req_index = 0;
 StrClear(HTTP_req, REQ_BUF_SZ);
 break;
 }
 // every line of text received from the client ends with \r\n
 if (c == '\n') {
 // last character on line of received text
 // starting new line with next character read
 currentLineIsBlank = true;
 } 
 else if (c != '\r') {
 // a text character was received from client
 currentLineIsBlank = false;
 }
 } // end if (client.available())
 } // end while (client.connected())
 delay(1); // give the web browser time to receive the data
 client.stop(); // close the connection
 } // end if (client)
}

// checks if received HTTP request is switching on/off LEDs
// also saves the state of the LEDs
void SetLEDs(void)
{
 // LED 1 (pin 6)
 if (StrContains(HTTP_req, "LED1=1")) {
 LED_state[0] = 1; // save LED state
 digitalWrite(6, HIGH);
 }
 else if (StrContains(HTTP_req, "LED1=0")) {
 LED_state[0] = 0; // save LED state
 digitalWrite(6, LOW);
 }
 // LED 2 (pin 7)
 if (StrContains(HTTP_req, "LED2=1")) {
 LED_state[1] = 1; // save LED state
 digitalWrite(7, HIGH);
 }
 else if (StrContains(HTTP_req, "LED2=0")) {
 LED_state[1] = 0; // save LED state
 digitalWrite(7, LOW);
 }
 // LED 3 (pin 8)
 if (StrContains(HTTP_req, "LED3=1")) {
 LED_state[2] = 1; // save LED state
 digitalWrite(8, HIGH);
 }
 else if (StrContains(HTTP_req, "LED3=0")) {
 LED_state[2] = 0; // save LED state
 digitalWrite(8, LOW);
 }
 // LED 4 (pin 9)
 if (StrContains(HTTP_req, "LED4=1")) {
 LED_state[3] = 1; // save LED state
 digitalWrite(9, HIGH);
 }
 else if (StrContains(HTTP_req, "LED4=0")) {
 LED_state[3] = 0; // save LED state
 digitalWrite(9, LOW);
 }
}

// send the XML file with analog values, switch status
// and LED status
void XML_response(EthernetClient cl)
{
 int analog_val; // stores value read from analog inputs
 int count; // used by 'for' loops
 int sw_arr[] = {2, 3, 5}; // pins interfaced to switches
 
 cl.print("<?xml version = \"1.0\" ?>");
 cl.print("<inputs>");
 // read analog inputs
 for (count = 2; count <= 5; count++) { // A2 to A5
 if (count == 2) //Añadimos este código para escalar las señales analógicas
 {analog_val = analogRead(count);}
 if (count == 3)
 {analog_val = analogRead(count);}
 if (count == 4)
 {analog_val = analogRead(count)*5*100/1024;} //Escalamos la entrada para un sensor de temperatura LM35
 if (count == 5)
 {analog_val = analogRead(count)*5*100/1024;} //Escalamos la entrada para un sensor de temperatura LM35
 
 cl.print("<analog>");
 cl.print(analog_val);
 cl.println("</analog>");
 }
 // read switches
 for (count = 0; count < 3; count++) {
 cl.print("<switch>");
 if (digitalRead(sw_arr[count])) {
 cl.print("ON");
 }
 else {
 cl.print("OFF");
 }
 cl.println("</switch>");
 }
 // checkbox LED states
 // LED1
 cl.print("<LED>");
 if (LED_state[0]) {
 cl.print("checked");
 }
 else {
 cl.print("unchecked");
 }
 cl.println("</LED>");
 // LED2
 cl.print("<LED>");
 if (LED_state[1]) {
 cl.print("checked");
 }
 else {
 cl.print("unchecked");
 }
 cl.println("</LED>");
 // button LED states
 // LED3
 cl.print("<LED>");
 if (LED_state[2]) {
 cl.print("on");
 }
 else {
 cl.print("off");
 }
 cl.println("</LED>");
 // LED4
 cl.print("<LED>");
 if (LED_state[3]) {
 cl.print("on");
 }
 else {
 cl.print("off");
 }
 cl.println("</LED>");
 
 cl.print("</inputs>");
}

// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
 for (int i = 0; i < length; i++) {
 str[i] = 0;
 }
}

// searches for the string sfind in the string str
// returns 1 if string found
// returns 0 if string not found
char StrContains(char *str, char *sfind)
{
 char found = 0;
 char index = 0;
 char len;

 len = strlen(str);
 
 if (strlen(sfind) > len) {
 return 0;
 }
 while (index < len) {
 if (str[index] == sfind[found]) {
 found++;
 if (strlen(sfind) == found) {
 return 1;
 }
 }
 else {
 found = 0;
 }
 index++;
 }

 return 0;
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

#include <SPI.h>

#include <Ethernet.h>

#include <SD.h>

// size of buffer used to capture HTTP requests

#define REQ_BUF_SZ 60

// MAC address from Ethernet shield sticker under board

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress ip(192, 168, 1, 15); // IP address, may need to change depending on network

EthernetServer server(80); // create a server at port 80

File webFile; // the web page file on the SD card

char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string

char req_index = 0; // index into HTTP_req buffer

boolean LED_state[4] = {0}; // stores the states of the LEDs

void setup()

{

// disable Ethernet chip

pinMode(10, OUTPUT);

digitalWrite(10, HIGH);

Serial.begin(9600); // for debugging

// initialize SD card

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

if (!SD.begin(4)) {

Serial.println("ERROR - SD card initialization failed!");

return; // init failed

}

Serial.println("SUCCESS - SD card initialized.");

// check for index.htm file

if (!SD.exists("index.htm")) {

Serial.println("ERROR - Can't find index.htm file!");

return; // can't find index file

}

Serial.println("SUCCESS - Found index.htm file.");

// switches on pins 2, 3 and 5

pinMode(2, INPUT);

pinMode(3, INPUT);

pinMode(5, INPUT);

// LEDs

pinMode(6, OUTPUT);

pinMode(7, OUTPUT);

pinMode(8, OUTPUT);

pinMode(9, OUTPUT);

Ethernet.begin(mac, ip); // initialize Ethernet device

server.begin(); // start to listen for clients

}

void loop()

{

EthernetClient client = server.available(); // try to get client

if (client) { // got client?

boolean currentLineIsBlank = true;

while (client.connected()) {

if (client.available()) { // client data available to read

char c = client.read(); // read 1 byte (character) from client

// limit the size of the stored received HTTP request

// buffer first part of HTTP request in HTTP_req array (string)

// leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)

if (req_index < (REQ_BUF_SZ - 1)) {

HTTP_req[req_index] = c; // save HTTP request character

req_index++;

}

// last line of client request is blank and ends with \n

// respond to client only after last line received

if (c == '\n' && currentLineIsBlank) {

// send a standard http response header

client.println("HTTP/1.1 200 OK");

// remainder of header follows below, depending on if

// web page or XML page is requested

// Ajax request - send XML file

if (StrContains(HTTP_req, "ajax_inputs")) {

// send rest of HTTP header

client.println("Content-Type: text/xml");

client.println("Connection: keep-alive");

client.println();

SetLEDs();

// send XML file containing input states

XML_response(client);

}

else { // web page request

// send rest of HTTP header

client.println("Content-Type: text/html");

client.println("Connection: keep-alive");

client.println();

// send web page

webFile = SD.open("index.htm"); // open web page file

if (webFile) {

while(webFile.available()) {

client.write(webFile.read()); // send web page to client

}

webFile.close();

}

// display received HTTP request on serial port

Serial.print(HTTP_req);

// reset buffer index and all buffer elements to 0

req_index = 0;

StrClear(HTTP_req, REQ_BUF_SZ);

break;

}

// every line of text received from the client ends with \r\n

if (c == '\n') {

// last character on line of received text

// starting new line with next character read

currentLineIsBlank = true;

}

else if (c != '\r') {

// a text character was received from client

currentLineIsBlank = false;

}

} // end if (client.available())

} // end while (client.connected())

delay(1); // give the web browser time to receive the data

client.stop(); // close the connection

} // end if (client)

}

// checks if received HTTP request is switching on/off LEDs

// also saves the state of the LEDs

void SetLEDs(void)

{

// LED 1 (pin 6)

if (StrContains(HTTP_req, "LED1=1")) {

LED_state[0] = 1; // save LED state

digitalWrite(6, HIGH);

}

else if (StrContains(HTTP_req, "LED1=0")) {

LED_state[0] = 0; // save LED state

digitalWrite(6, LOW);

}

// LED 2 (pin 7)

if (StrContains(HTTP_req, "LED2=1")) {

LED_state[1] = 1; // save LED state

digitalWrite(7, HIGH);

}

else if (StrContains(HTTP_req, "LED2=0")) {

LED_state[1] = 0; // save LED state

digitalWrite(7, LOW);

}

// LED 3 (pin 8)

if (StrContains(HTTP_req, "LED3=1")) {

LED_state[2] = 1; // save LED state

digitalWrite(8, HIGH);

}

else if (StrContains(HTTP_req, "LED3=0")) {

LED_state[2] = 0; // save LED state

digitalWrite(8, LOW);

}

// LED 4 (pin 9)

if (StrContains(HTTP_req, "LED4=1")) {

LED_state[3] = 1; // save LED state

digitalWrite(9, HIGH);

}

else if (StrContains(HTTP_req, "LED4=0")) {

LED_state[3] = 0; // save LED state

digitalWrite(9, LOW);

}

// send the XML file with analog values, switch status

// and LED status

void XML_response(EthernetClient cl)

{

int analog_val; // stores value read from analog inputs

int count; // used by 'for' loops

int sw_arr[] = {2, 3, 5}; // pins interfaced to switches

cl.print("<?xml version = \"1.0\" ?>");

cl.print("<inputs>");

// read analog inputs

for (count = 2; count <= 5; count++) { // A2 to A5

if (count == 2) //Añadimos este código para escalar las señales analógicas

{analog_val = analogRead(count);}

if (count == 3)

{analog_val = analogRead(count);}

if (count == 4)

{analog_val = analogRead(count)*5*100/1024;} //Escalamos la entrada para un sensor de temperatura LM35

if (count == 5)

{analog_val = analogRead(count)*5*100/1024;} //Escalamos la entrada para un sensor de temperatura LM35

cl.print("<analog>");

cl.print(analog_val);

cl.println("</analog>");

}

// read switches

for (count = 0; count < 3; count++) {

cl.print("<switch>");

if (digitalRead(sw_arr[count])) {

cl.print("ON");

}

else {

cl.print("OFF");

}

cl.println("</switch>");

}

// checkbox LED states

// LED1

cl.print("<LED>");

if (LED_state[0]) {

cl.print("checked");

}

else {

cl.print("unchecked");

}

cl.println("</LED>");

// LED2

cl.print("<LED>");

if (LED_state[1]) {

cl.print("checked");

}

else {

cl.print("unchecked");

}

cl.println("</LED>");

// button LED states

// LED3

cl.print("<LED>");

if (LED_state[2]) {

cl.print("on");

}

else {

cl.print("off");

}

cl.println("</LED>");

// LED4

cl.print("<LED>");

if (LED_state[3]) {

cl.print("on");

}

else {

cl.print("off");

}

cl.println("</LED>");

cl.print("</inputs>");

}

// sets every element of str to 0 (clears array)

void StrClear(char *str, char length)

{

for (int i = 0; i < length; i++) {

str[i] = 0;

}

// searches for the string sfind in the string str

// returns 1 if string found

// returns 0 if string not found

char StrContains(char *str, char *sfind)

{

char found = 0;

char index = 0;

char len;

len = strlen(str);

if (strlen(sfind) > len) {

return 0;

}

while (index < len) {

if (str[index] == sfind[found]) {

found++;

if (strlen(sfind) == found) {

return 1;

}

else {

found = 0;

}

index++;

}

return 0;

}

El programa que hay que introducir en la microSD de la placa W5100 que nos comunica por Ethernet, debe tener el nombre “index.htm”. Podremos activar las salidas y recibir la información de las entradas digitales y analógicas desde cualquier lugar del mundo.

<!DOCTYPE html>
<html>
<head>
 <title>Arduino</title>
 <script>
strLED1 = "";
strLED2 = "";
strLED3 = "";
strLED4 = "";
var LED3_state = 0;
var LED4_state = 0;
function GetArduinoIO()
{
nocache = "&nocache=" + Math.random() * 1000000;
var request = new XMLHttpRequest();
request.onreadystatechange = function()
{
if (this.readyState == 4) {
if (this.status == 200) {
if (this.responseXML != null) {
// XML file received - contains analog values, switch values and LED states
var count;
// get analog inputs
var num_an = this.responseXML.getElementsByTagName('analog').length;
for (count = 0; count < num_an; count++) {
document.getElementsByClassName("analog")[count].innerHTML =
this.responseXML.getElementsByTagName('analog')[count].childNodes[0].nodeValue;
}
// get switch inputs
var num_an = this.responseXML.getElementsByTagName('switch').length;
for (count = 0; count < num_an; count++) {
document.getElementsByClassName("switches")[count].innerHTML =
this.responseXML.getElementsByTagName('switch')[count].childNodes[0].nodeValue;
}
// LED 1
if (this.responseXML.getElementsByTagName('LED')[0].childNodes[0].nodeValue === "checked") {
document.LED_form.LED1.checked = true;
}
else {
document.LED_form.LED1.checked = false;
}
// LED 2
if (this.responseXML.getElementsByTagName('LED')[1].childNodes[0].nodeValue === "checked") {
document.LED_form.LED2.checked = true;
}
else {
document.LED_form.LED2.checked = false;
}
// LED 3
if (this.responseXML.getElementsByTagName('LED')[2].childNodes[0].nodeValue === "on") {
document.getElementById("LED3").innerHTML = "SALIDA 8 ON ";
LED3_state = 1;
}
else {
document.getElementById("LED3").innerHTML = "SALIDA 8 OFF ";
LED3_state = 0;
}
// LED 4
if (this.responseXML.getElementsByTagName('LED')[3].childNodes[0].nodeValue === "on") {
document.getElementById("LED4").innerHTML = "SALIDA 9 ON ";
LED4_state = 1;
}
else {
document.getElementById("LED4").innerHTML = "SALIDA 9 OFF ";
LED4_state = 0;
}
}
}
}
}
// send HTTP GET request with LEDs to switch on/off if any
request.open("GET", "ajax_inputs" + strLED1 + strLED2 + strLED3 + strLED4 + nocache, true);
request.send(null);
setTimeout('GetArduinoIO()', 1000);
strLED1 = "";
strLED2 = "";
strLED3 = "";
strLED4 = "";
}
// service LEDs when checkbox checked/unchecked
function GetCheck()
{
if (LED_form.LED1.checked) {
strLED1 = "&LED1=1";
}
else {
strLED1 = "&LED1=0";
}
if (LED_form.LED2.checked) {
strLED2 = "&LED2=1";
}
else {
strLED2 = "&LED2=0";
}
}
function GetButton1()
{
if (LED3_state === 1) {
LED3_state = 0;
strLED3 = "&LED3=0";
}
else {
LED3_state = 1;
strLED3 = "&LED3=1";
}
}
function GetButton2()
{
if (LED4_state === 1) {
LED4_state = 0;
strLED4 = "&LED4=0";
}
else {
LED4_state = 1;
strLED4 = "&LED4=1";
}
}
 </script>
 <style>
.IO_box {
float: left;
margin: 0 20px 20px 0;
border: 1px solid blue;
padding: 0 5px 0 5px;
width: 120px;
}
h1 {
font-size: 120%;
color: blue;
margin: 0 0 10px 0;
}
h2 {
font-size: 85%;
color: #5734E6;
margin: 5px 0 5px 0;
}
p, form, button {
font-size: 80%;
color: #252525;
}
.small_text {
font-size: 70%;
color: #737373;
}
 </style>
</head>
<body onload="GetArduinoIO()">
<h1>Arduino</h1>
<div class="IO_box">
<h2>Entradas anal&oacute;gicas</h2>
<p>A2: <span class="analog">...</span></p>
<p>A3: <span class="analog">...</span></p>
<p>Tª interior: <span class="analog">...</span>ºC</p>
<p>Tª exterior: <span class="analog">...</span>ºC</p>
</div>
<div class="IO_box">
<h2>Entradas</h2>
<p>Entrada 2: <span class="switches">...</span></p>
<p>Entrada 3: <span class="switches">...</span></p>
<p>Entrada 5: <span class="switches">...</span></p>
</div>
<div class="IO_box">
<h2>Salidas</h2>
<form id="check_LEDs" name="LED_form"> <input
 name="LED1" value="0" onclick="GetCheck()"
 type="checkbox">Salida 6<br>
 <br>
 <input name="LED2" value="0" onclick="GetCheck()"
 type="checkbox">Salida 7<br>
 <br>
</form>
</div>
<div class="IO_box">
<h2>Salidas</h2>
<button type="button" id="LED3" onclick="GetButton1()">SALIDA
8 OFF </button><br>
<br>
<button type="button" id="LED4" onclick="GetButton2()">SALIDA
9 OFF </button><br>
<br>
</div>
</body>
</html>

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

<!DOCTYPE html>

<html>

<head>

<title>Arduino</title>

strLED1 = "";

strLED2 = "";

strLED3 = "";

strLED4 = "";

var LED3_state = 0;

var LED4_state = 0;

function GetArduinoIO()

{

nocache = "&nocache=" + Math.random() * 1000000;

var request = new XMLHttpRequest();

request.onreadystatechange = function()

{

if (this.readyState == 4) {

if (this.status == 200) {

if (this.responseXML != null) {

// XML file received - contains analog values, switch values and LED states

var count;

// get analog inputs

var num_an = this.responseXML.getElementsByTagName('analog').length;

for (count = 0; count < num_an; count++) {

document.getElementsByClassName("analog")[count].innerHTML =

this.responseXML.getElementsByTagName('analog')[count].childNodes[0].nodeValue;

}

// get switch inputs

var num_an = this.responseXML.getElementsByTagName('switch').length;

for (count = 0; count < num_an; count++) {

document.getElementsByClassName("switches")[count].innerHTML =

this.responseXML.getElementsByTagName('switch')[count].childNodes[0].nodeValue;

}

// LED 1

if (this.responseXML.getElementsByTagName('LED')[0].childNodes[0].nodeValue === "checked") {

document.LED_form.LED1.checked = true;

}

else {

document.LED_form.LED1.checked = false;

}

// LED 2

if (this.responseXML.getElementsByTagName('LED')[1].childNodes[0].nodeValue === "checked") {

document.LED_form.LED2.checked = true;

}

else {

document.LED_form.LED2.checked = false;

}

// LED 3

if (this.responseXML.getElementsByTagName('LED')[2].childNodes[0].nodeValue === "on") {

document.getElementById("LED3").innerHTML = "SALIDA 8 ON ";

LED3_state = 1;

}

else {

document.getElementById("LED3").innerHTML = "SALIDA 8 OFF ";

LED3_state = 0;

}

// LED 4

if (this.responseXML.getElementsByTagName('LED')[3].childNodes[0].nodeValue === "on") {

document.getElementById("LED4").innerHTML = "SALIDA 9 ON ";

LED4_state = 1;

}

else {

document.getElementById("LED4").innerHTML = "SALIDA 9 OFF ";

LED4_state = 0;

}

// send HTTP GET request with LEDs to switch on/off if any

request.open("GET", "ajax_inputs" + strLED1 + strLED2 + strLED3 + strLED4 + nocache, true);

request.send(null);

setTimeout('GetArduinoIO()', 1000);

strLED1 = "";

strLED2 = "";

strLED3 = "";

strLED4 = "";

}

// service LEDs when checkbox checked/unchecked

function GetCheck()

{

if (LED_form.LED1.checked) {

strLED1 = "&LED1=1";

}

else {

strLED1 = "&LED1=0";

}

if (LED_form.LED2.checked) {

strLED2 = "&LED2=1";

}

else {

strLED2 = "&LED2=0";

}

function GetButton1()

{

if (LED3_state === 1) {

LED3_state = 0;

strLED3 = "&LED3=0";

}

else {

LED3_state = 1;

strLED3 = "&LED3=1";

}

function GetButton2()

{

if (LED4_state === 1) {

LED4_state = 0;

strLED4 = "&LED4=0";

}

else {

LED4_state = 1;

strLED4 = "&LED4=1";

}

</script>

<style>

.IO_box {

float: left;

margin: 0 20px 20px 0;

border: 1px solid blue;

padding: 0 5px 0 5px;

width: 120px;

}

h1 {

font-size: 120%;

color: blue;

margin: 0 0 10px 0;

}

h2 {

font-size: 85%;

color: #5734E6;

margin: 5px 0 5px 0;

}

p, form, button {

font-size: 80%;

color: #252525;

}

.small_text {

font-size: 70%;

color: #737373;

}

</style>

</head>

<h1>Arduino</h1>

<h2>Entradas analógicas</h2>

<p>Tª interior: <span class="analog">...</span>ºC</p>

<p>Tª exterior: <span class="analog">...</span>ºC</p>

</div>

<h2>Entradas</h2>

<p>Entrada 2: <span class="switches">...</span></p>

<p>Entrada 3: <span class="switches">...</span></p>

<p>Entrada 5: <span class="switches">...</span></p>

</div>

<h2>Salidas</h2>

<form id="check_LEDs" name="LED_form"> <input

name="LED1" value="0" onclick="GetCheck()"

type="checkbox">Salida 6<br>

<br>

<input name="LED2" value="0" onclick="GetCheck()"

type="checkbox">Salida 7<br>

<br>

</form>

</div>

<h2>Salidas</h2>

<button type="button" id="LED3" onclick="GetButton1()">SALIDA

8 OFF </button><br>

<br>

<button type="button" id="LED4" onclick="GetButton2()">SALIDA

9 OFF </button><br>

<br>

</div>

</body>

</html>

Telecontrol y comunicaciones.

Telecontrol, comunicaciones, arduino, raspberry …

Monthly Archives: Diciembre 2015

Activar varias salidas y recibir señales por las entradas de arduino, con la placa W5100.

Instalación y programación.