Created
January 23, 2012 20:55
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ardREST
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/* | |
A REST-style interface for the Arduino Ethernet Board. | |
Based on RESTduino: https://github.com/jjg/RESTduino | |
Adapted for the Arduino Ethernet Board | |
by Marcel Hauri | http://m83.ch | twitter.com/mhauri | |
*/ | |
#include <SPI.h> | |
#include <Ethernet.h> | |
byte mac[] = {0x90, 0xA2, 0xDA, 0x00, 0xEE, 0xAB}; | |
byte ip[] = {192,168,250,4}; | |
EthernetServer server(80); | |
void setup() | |
{ | |
Ethernet.begin(mac, ip); | |
server.begin(); | |
} | |
#define BUFSIZE 255 | |
void loop() | |
{ | |
char clientline[BUFSIZE]; | |
int index = 0; | |
EthernetClient client = server.available(); | |
if (client) { | |
index = 0; | |
while (client.connected()) { | |
if (client.available()) { | |
char c = client.read(); | |
if(c != '\n' && c != '\r'){ | |
clientline[index] = c; | |
index++; | |
if(index >= BUFSIZE) | |
index = BUFSIZE -1; | |
continue; | |
} | |
String urlString = String(clientline); | |
String op = urlString.substring(0,urlString.indexOf(' ')); | |
urlString = urlString.substring(urlString.indexOf('/'), urlString.indexOf(' ', urlString.indexOf('/'))); | |
urlString.toCharArray(clientline, BUFSIZE); | |
char *pin = strtok(clientline,"/"); | |
char *value = strtok(NULL,"/"); | |
char outValue[10] = "MU"; | |
String jsonOut = String(); | |
if(pin != NULL){ | |
if(value != NULL){ | |
int selectedPin = atoi (pin); | |
pinMode(selectedPin, OUTPUT); | |
if(strncmp(value, "HIGH", 4) == 0 || strncmp(value, "LOW", 3) == 0){ | |
if(strncmp(value, "HIGH", 4) == 0){ | |
digitalWrite(selectedPin, HIGH); | |
} | |
if(strncmp(value, "LOW", 3) == 0){ | |
digitalWrite(selectedPin, LOW); | |
} | |
} else { | |
int selectedValue = atoi(value); | |
analogWrite(selectedPin, selectedValue); | |
} | |
jsonOut += "{\""; | |
jsonOut += pin; | |
jsonOut += "\":\""; | |
jsonOut += value; | |
jsonOut += "\"}"; | |
client.println("HTTP/1.1 200 OK"); | |
client.println("Content-Type: text/html"); | |
client.println("Access-Control-Allow-Origin: *"); | |
client.println(); | |
client.println(jsonOut); | |
} | |
else { | |
if(pin[0] == 'a' || pin[0] == 'A'){ | |
int selectedPin = pin[1] - '0'; | |
sprintf(outValue,"%d",analogRead(selectedPin)); | |
} | |
else if(pin[0] != NULL) { | |
int selectedPin = pin[0] - '0'; | |
pinMode(selectedPin, INPUT); | |
int inValue = digitalRead(selectedPin); | |
if(inValue == 0){ | |
sprintf(outValue,"%s","LOW"); | |
} | |
if(inValue == 1){ | |
sprintf(outValue,"%s","HIGH"); | |
} | |
} | |
jsonOut += "{\""; | |
jsonOut += pin; | |
jsonOut += "\":\""; | |
jsonOut += outValue; | |
jsonOut += "\"}"; | |
client.println("HTTP/1.1 200 OK"); | |
client.println("Content-Type: text/html"); | |
client.println("Access-Control-Allow-Origin: *"); | |
client.println(); | |
client.println(jsonOut); | |
} | |
} | |
else { | |
// error | |
client.println("HTTP/1.1 404 Not Found"); | |
client.println("Content-Type: text/html"); | |
client.println(); | |
} | |
break; | |
} | |
} | |
delay(1); | |
client.stop(); | |
} | |
} |
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