Designed specifically to work with the Adafruit WiFi products:
----> Adafruit HUZZAH CC3000 WiFi Breakout with Onboard Antenna [v1.1] : ID 1469 : $34.95 : Adafruit Industries, Unique & fun DIY electronics and kits
#include <Adafruit_CC3000.h>
#include <SPI.h>
#include "utility/debug.h"
#include "utility/socket.h"
// These are the interrupt and control pins
#define ADAFRUIT_CC3000_IRQ 3 // MUST be an interrupt pin!
// These can be any two pins
#define ADAFRUIT_CC3000_VBAT 5
#define ADAFRUIT_CC3000_CS 10
// Use hardware SPI for the remaining pins
// On an UNO, SCK = 13, MISO = 12, and MOSI = 11
Adafruit_CC3000 cc3000 = Adafruit_CC3000(ADAFRUIT_CC3000_CS, ADAFRUIT_CC3000_IRQ, ADAFRUIT_CC3000_VBAT,
SPI_CLOCK_DIVIDER); // you can change this clock speed
#define WLAN_SSID "myNetwork" // cannot be longer than 32 characters!
#define WLAN_PASS "myPassword"
// Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2
#define WLAN_SECURITY WLAN_SEC_WPA2
#define LISTEN_PORT 80 // What TCP port to listen on for connections.
// The HTTP protocol uses port 80 by default.
#define MAX_ACTION 10 // Maximum length of the HTTP action that can be parsed.
#define MAX_PATH 64 // Maximum length of the HTTP request path that can be parsed.
// There isn't much memory available so keep this short!
#define BUFFER_SIZE MAX_ACTION + MAX_PATH + 20 // Size of buffer for incoming request data.
// Since only the first line is parsed this
// needs to be as large as the maximum action
// and path plus a little for whitespace and
// HTTP version.
#define TIMEOUT_MS 500 // Amount of time in milliseconds to wait for
// an incoming request to finish. Don't set this
// too high or your server could be slow to respond.
Adafruit_CC3000_Server httpServer(LISTEN_PORT);
uint8_t buffer[BUFFER_SIZE+1];
int bufindex = 0;
char action[MAX_ACTION+1];
char path[MAX_PATH+1];
void setup(void)
{
Serial.begin(115200);
Serial.println(F("Hello, CC3000!\n"));
Serial.print("Free RAM: "); Serial.println(getFreeRam(), DEC);
// Initialise the module
Serial.println(F("\nInitializing..."));
if (!cc3000.begin())
{
Serial.println(F("Couldn't begin()! Check your wiring?"));
while(1);
}
Serial.print(F("\nAttempting to connect to ")); Serial.println(WLAN_SSID);
if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
Serial.println(F("Failed!"));
while(1);
}
Serial.println(F("Connected!"));
Serial.println(F("Request DHCP"));
while (!cc3000.checkDHCP())
{
delay(100); // ToDo: Insert a DHCP timeout!
}
// Display the IP address DNS, Gateway, etc.
while (! displayConnectionDetails()) {
delay(1000);
}
// ******************************************************
// You can safely remove this to save some flash memory!
// ******************************************************
Serial.println(F("\r\nNOTE: This sketch may cause problems with other sketches"));
Serial.println(F("since the .disconnect() function is never called, so the"));
Serial.println(F("AP may refuse connection requests from the CC3000 until a"));
Serial.println(F("timeout period passes. This is normal behaviour since"));
Serial.println(F("there isn't an obvious moment to disconnect with a server.\r\n"));
// Start listening for connections
httpServer.begin();
Serial.println(F("Listening for connections..."));
}
void loop(void)
{
// Try to get a client which is connected.
Adafruit_CC3000_ClientRef client = httpServer.available();
if (client) {
Serial.println(F("Client connected."));
// Process this request until it completes or times out.
// Note that this is explicitly limited to handling one request at a time!
// Clear the incoming data buffer and point to the beginning of it.
bufindex = 0;
memset(&buffer, 0, sizeof(buffer));
// Clear action and path strings.
memset(&action, 0, sizeof(action));
memset(&path, 0, sizeof(path));
// Set a timeout for reading all the incoming data.
unsigned long endtime = millis() + TIMEOUT_MS;
// Read all the incoming data until it can be parsed or the timeout expires.
bool parsed = false;
while (!parsed && (millis() < endtime) && (bufindex < BUFFER_SIZE)) {
if (client.available()) {
buffer[bufindex++] = client.read();
}
parsed = parseRequest(buffer, bufindex, action, path);
}
// Handle the request if it was parsed.
if (parsed) {
Serial.println(F("Processing request"));
Serial.print(F("Action: ")); Serial.println(action);
Serial.print(F("Path: ")); Serial.println(path);
// Check the action to see if it was a GET request.
if (strcmp(action, "GET") == 0) {
// Respond with the path that was accessed.
// First send the success response code.
client.fastrprintln(F("HTTP/1.1 200 OK"));
// Then send a few headers to identify the type of data returned and that
// the connection will not be held open.
client.fastrprintln(F("Content-Type: text/plain"));
client.fastrprintln(F("Connection: close"));
client.fastrprintln(F("Server: Adafruit CC3000"));
// Send an empty line to signal start of body.
client.fastrprintln(F(""));
// Now send the response data.
client.fastrprintln(F("Hello world!"));
client.fastrprint(F("You accessed path: ")); client.fastrprintln(path);
}
else {
// Unsupported action, respond with an HTTP 405 method not allowed error.
client.fastrprintln(F("HTTP/1.1 405 Method Not Allowed"));
client.fastrprintln(F(""));
}
}
// Wait a short period to make sure the response had time to send before
// the connection is closed (the CC3000 sends data asyncronously).
delay(100);
// Close the connection when done.
Serial.println(F("Client disconnected"));
client.close();
}
}
bool parseRequest(uint8_t* buf, int bufSize, char* action, char* path) {
// Check if the request ends with \r\n to signal end of first line.
if (bufSize < 2)
return false;
if (buf[bufSize-2] == '\r' && buf[bufSize-1] == '\n') {
parseFirstLine((char*)buf, action, path);
return true;
}
return false;
}
// Parse the action and path from the first line of an HTTP request.
void parseFirstLine(char* line, char* action, char* path) {
// Parse first word up to whitespace as action.
char* lineaction = strtok(line, " ");
if (lineaction != NULL)
strncpy(action, lineaction, MAX_ACTION);
// Parse second word up to whitespace as path.
char* linepath = strtok(NULL, " ");
if (linepath != NULL)
strncpy(path, linepath, MAX_PATH);
}
// Tries to read the IP address and other connection details
bool displayConnectionDetails(void)
{
uint32_t ipAddress, netmask, gateway, dhcpserv, dnsserv;
if(!cc3000.getIPAddress(&ipAddress, &netmask, &gateway, &dhcpserv, &dnsserv))
{
Serial.println(F("Unable to retrieve the IP Address!\r\n"));
return false;
}
else
{
Serial.print(F("\nIP Addr: ")); cc3000.printIPdotsRev(ipAddress);
Serial.print(F("\nNetmask: ")); cc3000.printIPdotsRev(netmask);
Serial.print(F("\nGateway: ")); cc3000.printIPdotsRev(gateway);
Serial.print(F("\nDHCPsrv: ")); cc3000.printIPdotsRev(dhcpserv);
Serial.print(F("\nDNSserv: ")); cc3000.printIPdotsRev(dnsserv);
Serial.println();
return true;
}
}