Example Code for Arduino-Local TCP Server Communication

Hardware Preparation

• DFR0321 WIFI IoT Node Development Board x 1
• FIT0265 Micro USB Cable x 1

Software Preparation

• Download Arduino IDE: Click to download Arduino IDE
• Download the Adafruit_CC3000_Library-master: Adafruit_CC3000_Library-master
• Download a TCP assistant, used to create a local TCP server from your PC

Operation Steps

1. Open the Tool above. Config the port number, and click listening to wait for the client connection.

2. Open the sketch named "Wido2LocalTcpServer", and config the TCP server address and port according to your tool setup.

/* Set the target ip address and connection port */
  uint32_t ip = WiDo.IP2U32(192,168,0,134);
  tcpClient = WiDo.connectTCP(ip, 9000);

Upload the full sample after TCP/Router configuration.

#include <Adafruit_CC3000.h>
#include <ccspi.h>
#include <SPI.h>
#include <string.h>
#include "utility/debug.h"

#define WiDo_IRQ   7
#define WiDo_VBAT  5
#define WiDo_CS    10
Adafruit_CC3000 WiDo = Adafruit_CC3000(WiDo_CS, WiDo_IRQ, WiDo_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 TIMEOUT_MS  1000

void setup(){

  Serial.begin(115200);
  /* Initialise the module */
  Serial.println(F("\nInitialising the CC3000 ..."));
  if (!WiDo.begin())
  {
    Serial.println(F("Unable to initialise the CC3000! Check your wiring?"));
    while(1);
  }

  /* NOTE: Secure connections are not available in 'Tiny' mode!
     By default connectToAP will retry indefinitely, however you can pass an
     optional maximum number of retries (greater than zero) as the fourth parameter.
  */

  Serial.println(F("Connecting Router/AP"));
  if (!WiDo.connectToAP(WLAN_SSID, WLAN_PASS, WLAN_SECURITY)) {
    Serial.println(F("Failed!"));
    while(1);
  }

  Serial.println(F("Router/AP Connected!"));

  /* Wait for DHCP to complete */
  Serial.println(F("Request DHCP"));
  while (!WiDo.checkDHCP())
  {
    delay(100); // ToDo: Insert a DHCP timeout!
  }
}

void loop(){

  static Adafruit_CC3000_Client tcpClient;
  static unsigned long heartRate = millis();

  if(!tcpClient.connected()){
    Serial.println("Try to connect the Local Server");
    tcpClient.close();

    /* Set the target ip address and connection port */
    uint32_t ip = WiDo.IP2U32(192,168,0,134);
    tcpClient = WiDo.connectTCP(ip, 4000);

    if(!tcpClient.connected()){
      Serial.println(F("Couldn't connect to server! Make sure TCP Test Tool is running on the server."));
      while(1);
    }
  }
  else if(millis() - heartRate > 1000){
    heartRate = millis();  // Update time stamp of the microcontroller system

    char clientString[30];
    sprintf(clientString, "%s%d%s", "Wido heartRate: ",heartRate/1000," s\r\n");

    Serial.println(clientString);
    tcpClient.fastrprintln(clientString);
  }

  /* Read data until either the connection is closed, or the timeout is reached. */
  unsigned long lastRead = millis();
  while (tcpClient.connected() && (millis() - lastRead < TIMEOUT_MS)) {
    while (tcpClient.available()) {
      char c = tcpClient.read();
      Serial.print(c);
      lastRead = millis();

      // Disable sending message for a moment
      heartRate = millis();
    }
  }
}

Result

Open the serial monitor. After connecting the router, your Wido will start to upload data to the TCP server tool!
Finish the local server connection and communication now.