Arduino UNO，CC3000：while（client.connected）
我正在玩Arduino UNO和连接到远程Web服务的CC3000屏蔽。 虽然我在循环脚本时遇到问题。 正如您在下面的代码中看到的那样，脚本应该以每5秒occupied一次的状态ping Web服务。 虽然在使用while(client.connected)会让Arduino永久停止/挂起。 即使while(client.connected) {}只是空的。
如果我不包括while(client.connected){}那么Web服务就没有被ping，这就是为什么我发现自己处于相当困境的原因。 请参阅下面的Arduino Sketch文件和下面的序列日志。
#include #include #include #include #include "utility/debug.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_DIV2); // you can change this clock speed but DI #define WLAN_SSID "WIFI" // cannot be longer than 32 characters! #define WLAN_PASS "WIFI_PW" // Security can be WLAN_SEC_UNSEC, WLAN_SEC_WEP, WLAN_SEC_WPA or WLAN_SEC_WPA2 #define WLAN_SECURITY WLAN_SEC_WPA2 uint32_t ip; int ledPin = 8; // choose the pin for the LED int ledPinSecond = 7; int inputPin = 2; // choose the input pin (for PIR sensor) int pirState = LOW; // we start, assuming no motion detected int val = 0; // variable for reading the pin status String occupied; /**************************************************************************/ /*! @brief Sets up the HW and the CC3000 module (called automatically on startup) */ /**************************************************************************/ void setup(void) { Serial.begin(115200); Serial.println(F("Hello, CC3000!\n")); displayDriverMode(); Serial.print("Free RAM: "); Serial.println(getFreeRam(), DEC); pinMode(ledPin, OUTPUT); // declare LED as output pinMode(ledPinSecond, OUTPUT); pinMode(inputPin, INPUT); // declare sensor as input /* Initialise the module */ Serial.println(F("\nInitialising the CC3000 ...")); if (!cc3000.begin()) { Serial.println(F("Unable to initialise the CC3000! Check your wiring?")); while(1); } /* Optional: Update the Mac Address to a known value */ /* uint8_t macAddress[6] = { 0x08, 0x00, 0x28, 0x01, 0x79, 0xB7 }; if (!cc3000.setMacAddress(macAddress)) { Serial.println(F("Failed trying to update the MAC address")); while(1); } */ uint16_t firmware = checkFirmwareVersion(); if ((firmware != 0x113) && (firmware != 0x118)) { Serial.println(F("Wrong firmware version!")); for(;;); } displayMACAddress(); /* Delete any old connection data on the module */ Serial.println(F("\nDeleting old connection profiles")); if (!cc3000.deleteProfiles()) { Serial.println(F("Failed!")); while(1); } /* Attempt to connect to an access point */ char *ssid = WLAN_SSID; /* Max 32 chars */ Serial.print(F("\nAttempting to connect to ")); Serial.println(ssid); /* NOTE: Secure connections are not available in 'Tiny' mode! */ if (!cc3000.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) { Serial.println(F("Failed!")); while(1); } Serial.println(F("Connected!")); /* Wait for DHCP to complete */ Serial.println(F("Request DHCP")); while (!cc3000.checkDHCP()) { delay(1000); // ToDo: Insert a DHCP timeout! } /* Display the IP address DNS, Gateway, etc. */ while (! displayConnectionDetails()) { delay(1000); } #ifndef CC3000_TINY_DRIVER /* Try looking up the webservice */ Serial.print(F("www.webservice.com -> ")); if (! cc3000.getHostByName("www.webservice.com", &ip)) { Serial.println(F("Could not resolve!")); } else { cc3000.printIPdotsRev(ip); } Serial.print(F("\n\rPinging ")); cc3000.printIPdotsRev(ip); Serial.print("..."); uint8_t replies = cc3000.ping(ip, 5); Serial.print(replies); Serial.println(F(" replies")); if (replies) Serial.println(F("Ping successful!")); #endif /* You need to make sure to clean up after yourself or the CC3000 can freak out */ /* the next time you try to connect ... */ // Serial.println(F("\n\nClosing the connection")); // cc3000.disconnect(); } void loop(void) { val = digitalRead(inputPin); // read input value occupied = "Occupied"; Serial.print("Room state: "); Serial.println(occupied); sendGET(); delay(5000); } void sendGET() //client function to send/receive GET request data. { Serial.print(F("Initializing SendGET request\n")); Adafruit_CC3000_Client client = cc3000.connectTCP(ip, 80); char serverName[] = "www.webservice.com"; //webservice host if (client.connect(serverName, 80)) { //starts client connection, checks for connection Serial.print(F("Adding state to DB\n")); client.println("GET /folder/sensor.php?occupied="+ occupied +" HTTP/1.1"); //download text client.println("Host: webservice.com"); client.println("Connection: close"); //close 1.1 persistent connection client.println(); //end of get request Serial.print(F("Ending connection to DB\n")); } else { Serial.println("Connection to server failed"); //error message if no client connect Serial.println(); } Serial.print(F("Checking connection for bytes\n")); while (client.connected()) { while (client.available()) { //Read answer char c = client.read(); } } Serial.print(F("Checked for bytes\n")); Serial.print("disconnecting."); Serial.print("=================="); client.close(); //stop client } /**************************************************************************/ /*! @brief Displays the driver mode (tiny of normal), and the buffer size if tiny mode is not being used @note The buffer size and driver mode are defined in cc3000_common.h */ /**************************************************************************/ void displayDriverMode(void) { #ifdef CC3000_TINY_DRIVER Serial.println(F("CC3000 is configure in 'Tiny' mode")); #else Serial.print(F("RX Buffer : ")); Serial.print(CC3000_RX_BUFFER_SIZE); Serial.println(F(" bytes")); Serial.print(F("TX Buffer : ")); Serial.print(CC3000_TX_BUFFER_SIZE); Serial.println(F(" bytes")); #endif } /**************************************************************************/ /*! @brief Tries to read the CC3000's internal firmware patch ID */ /**************************************************************************/ uint16_t checkFirmwareVersion(void) { uint8_t major, minor; uint16_t version; #ifndef CC3000_TINY_DRIVER if(!cc3000.getFirmwareVersion(&major, &minor)) { Serial.println(F("Unable to retrieve the firmware version!\r\n")); version = 0; } else { Serial.print(F("Firmware V. : ")); Serial.print(major); Serial.print(F(".")); Serial.println(minor); version = major; version <<= 8; version |= minor; } #endif return version; } /**************************************************************************/ /*! @brief Tries to read the 6-byte MAC address of the CC3000 module */ /**************************************************************************/ void displayMACAddress(void) { uint8_t macAddress[6]; if(!cc3000.getMacAddress(macAddress)) { Serial.println(F("Unable to retrieve MAC Address!\r\n")); } else { Serial.print(F("MAC Address : ")); cc3000.printHex((byte*)&macAddress, 6); } } /**************************************************************************/ /*! @brief 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; } }
LOG
Hello, CC3000! RX Buffer : 131 bytes TX Buffer : 131 bytes Free RAM: 1047 Initialising the CC3000 ... Firmware V. : 1.24 MAC Address : MAC_ADDRESS Deleting old connection profiles Attempting to connect to 64 Allen Street - East Connected! Request DHCP IP Addr: XXX.XXX.XX.X Netmask: 255.255.255.0 Gateway: 192.168.0.1 DHCPsrv: 192.168.0.1 DNSserv: XXX.XX.XX www.webservice.com -> XX.XX.XXX.XXX Pinging XX.XX.XXX.XXX...5 replies Ping successful! Room state: Free Initializing SendGET request Adding state to DB Ending connection to DB Checking connection for bytes
为什么不将连接客户端的代码移动到连接的if语句中。 然后您不需要轮询client.connected()函数。
似乎逻辑是有缺陷的。 如果客户端已连接，它可能会保持连接，直到你在循环下面的行： client.close(); 这将导致循环永远不会结束。
或者你也可以在循环中添加一些代码，以防止它永远运行。
uint32_t theTime = millis(); while(client.connected()){ if( ( millis() - theTime ) >1000 ) break; //exit loop after one second. }