main.cpp

00001 #include "mbed.h"
00002 #include "XBeeWiFi.h"
00003 #include "EthernetNetIf.h"
00004 #include "TCPSocket.h"
00005 
00006 
00007 #define SECURITY SECURITY_WPA2
00008 #define SSID "XBEEWIFI"
00009 #define PASSPHRASE "PASSWORD"
00010 /*
00011 #define SECURITY SECURITY_OPEN
00012 #define SSID "XBEEWIFI"
00013 #define PASSPHRASE ""
00014 */
00015 #define HTTP_PORT 80
00016 #define HTTP_SRC_PORT 10080
00017 #define HTTP_TIMEOUT 5000 // ms
00018 #define METHOD_GET 0
00019 #define METHOD_POST 1
00020 
00021 DigitalOut myled(LED1);
00022 Serial pc(USBTX, USBRX);
00023 
00024 #if defined(TARGET_LPC1768) || defined(TARGET_LPC11U24)
00025 XBeeWiFi xbee(p11, p12, p13, p14, p15, p16);    // mosi, miso, sclk, ssel, attn, reset
00026 #elif defined(TARGET_LPC1114)
00027 XBeeWiFi xbee(dp2, dp1, dp6, dp9, dp10, dp11);  // mosi, miso, sclk, ssel, attn, reset
00028 #endif
00029 
00030 int init_wifi (int timeout) {
00031     int i, r;
00032 
00033     pc.printf("reset\r\n");
00034     r = xbee.reset();
00035     if (r < 0) {
00036         pc.printf("error reset %d\r\n", r);
00037         return -1;
00038     }
00039 
00040     xbee.getWiResponse(MODEM_STATUS_RESPONSE, 5000);    
00041 
00042     r = xbee.setup(SECURITY, SSID, PASSPHRASE);
00043     if (r < 0) {
00044         pc.printf("error setup %d\r\n", r);
00045         return -1;
00046     }
00047 
00048     for (i = 0; i < timeout; i ++) {
00049         wait(1);
00050         r = xbee.getStatus();
00051         pc.printf("status %02x: ", r);    
00052         switch (r) {
00053         case JOINED_AP:
00054             pc.printf("Successfully joined an access point.\r\n");
00055             return 0;
00056         case INITIALIZATION:
00057             pc.printf("WiFi initialization in progress.\r\n");
00058             break;
00059         case SSID_NOT_FOUND:
00060             pc.printf("SSID not found.\r\n");
00061             return -1;
00062         case SSID_NOT_CONFIGURED:
00063             pc.printf("SSID not configured.\r\n");
00064             return -1;
00065         case JOIN_FAILED:
00066             pc.printf("SSID join failed.\r\n");
00067             return -1;
00068         case WAITING_IPADDRESS:
00069             pc.printf("Waiting for IP configuration.\r\n");
00070             break;
00071         case WAITING_SOCKETS:
00072             pc.printf("Listening sockets are being set up.\r\n");
00073             break;
00074         case SCANNING_SSID:
00075             pc.printf("Currently scanning for SSID.\r\n");
00076             break;
00077         default:
00078             pc.printf("\r\n");
00079             break;
00080         }
00081     }
00082     return -1;
00083 }
00084 
00085 
00086 int httpRequest (int method, Host *host, char *uri, char *head, char *body) {
00087     Timer timeout;
00088     char buf[1500], tmp[40];
00089     int r, len;
00090     IPv4TransmitRequest httpRequest;
00091     AtCommandRequest atRequest;
00092     AtCommandResponse atResponse;
00093     IPV4RxFrame httpResponse;
00094     IpAddr ipaddr;
00095 
00096     // connect
00097     if (host->getIp().isNull()) {
00098         return -1;
00099     }
00100     if (! host->getPort()) {
00101         host->setPort(HTTP_PORT);
00102     }
00103 
00104     // create request
00105     if (method == METHOD_POST) {
00106         strcpy(buf, "POST ");
00107     } else {
00108         strcpy(buf, "GET ");
00109     }
00110     strcat(buf, uri);
00111     strcat(buf, " HTTP/1.1\r\nHost: ");
00112     strcat(buf, host->getName());
00113     strcat(buf, "\r\n");
00114     strcat(buf, "Connection: close\r\n");
00115     if (head) {
00116         strcat(buf, head);
00117     }
00118     if (method == METHOD_POST) {
00119         sprintf(tmp, "Content-Length: %d\r\n", strlen(body));
00120         strcat(buf, tmp);
00121     }
00122     strcat(buf, "\r\n");
00123 
00124     // send HTTP request
00125     len = strlen(buf);
00126     ipaddr = host->getIp();
00127     httpRequest.setAddress(ipaddr);
00128     httpRequest.setDstPort(host->getPort());
00129     httpRequest.setSrcPort(HTTP_SRC_PORT);
00130     httpRequest.setProtocol(PROTOCOL_TCP);
00131     httpRequest.setPayload((uint8_t*)buf);
00132     httpRequest.setPayloadLength(len);
00133     httpRequest.setFrameId(xbee.getNextFrameId());
00134     xbee.send(httpRequest);
00135     r = xbee.getWiResponse(TX_STATUS_RESPONSE, httpRequest.getFrameId());
00136     pc.printf("wifi TX: %d\r\n", r);
00137     if (r < 0) return -1;
00138 
00139     // wait responce
00140     timeout.reset();
00141     timeout.start();
00142     while (timeout.read_ms() < HTTP_TIMEOUT) {
00143         // recv HTTP request
00144         r = xbee.getWiResponse(IPv4_RX_FRAME, 0, 3000);
00145         pc.printf("wifi RX: %d\r\n", r);
00146         if (r >= 0) {
00147             timeout.reset();
00148             xbee.getResponse().getAtCommandResponse(httpResponse);
00149             pc.printf("\r\n--- recv %d ---\r\n", httpResponse.getDataLength());
00150             strncpy(buf, (char*)httpResponse.getData(), httpResponse.getDataLength());
00151             buf[httpResponse.getDataLength()] = 0;
00152             pc.printf(buf);
00153         }
00154     }
00155     timeout.stop();
00156     return 0;
00157 }
00158 
00159 int main() {
00160 //    int i;
00161     IpAddr ipaddr, netmask, gateway, nameserver;
00162     Host host;
00163 
00164 //    xbee.begin(115200);
00165 //    xbee.baud(921000);
00166     pc.baud(9600);
00167     pc.printf("XBee WiFi test\r\n");
00168 
00169     if (init_wifi(20)) {
00170         pc.printf("XBee error\r\n");
00171         return -1;
00172     }
00173 
00174     xbee.getAddress(ipaddr, netmask, gateway, nameserver);
00175     pc.printf("IP address %d.%d.%d.%d\r\n", ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
00176     if (ipaddr.isNull()) {
00177         pc.printf("not configure\r\n");
00178         return -1;
00179     }
00180 
00181 /*
00182     // DNS lookup 
00183     // *** Note: wifi is turned off when XBee send/recv the port 53 udp packet.
00184     //           XBee wifi --> request --> DNS server (wifi OK)
00185     //           DNS server --> responce --> XBee wifi (wifi turned off)
00186     //           why ??
00187     nameserver = gateway;
00188 //    nameserver = IpAddr(12,34,56,78);
00189     pc.printf("resolver %d.%d.%d.%d\r\n", nameserver[0], nameserver[1], nameserver[2], nameserver[3]);
00190     xbee.setNameserver(nameserver);
00191     i = xbee.getHostByName("mbed.org", ipaddr);
00192     if (i) {
00193         pc.printf("error resolv %d\r\n", i);
00194     } else {
00195         pc.printf("resolv address %d.%d.%d.%d\r\n", ipaddr[0], ipaddr[1], ipaddr[2], ipaddr[3]);
00196     }
00197 */
00198     // HTTP request
00199     wait(1);
00200     host.setIp(IpAddr(54,243,166,106));
00201     host.setName("httpbin.org");
00202     httpRequest(METHOD_GET, &host, "/get", "", "");
00203 
00204     pc.printf("done.\r\n");
00205     while(1);
00206 
00207 }