Simple Demo that gets a webpage
Dependencies: HTTPClient cc3000_hostdriver_mbedsocket mbed
Fork of EECS149_email_notifier by
main.cpp
- Committer:
- antoni0
- Date:
- 2014-10-14
- Revision:
- 11:e68fb69de2c6
- Parent:
- 10:1804a9dbaee0
- Child:
- 12:9e383f611c45
File content as of revision 11:e68fb69de2c6:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * \brief EECS149 demo * \author Antonio Iannopollo * * This demo illustrates how to connect the mbed KL25Z platform to internet * thorugh the CC3000 wifi breakout board (http://www.adafruit.com/product/1469). * Connections between the KL25Z and the CC3000 are made according to the * guide at https://learn.adafruit.com/adafruit-cc3000-wifi -- KL25Z and arduino * UNO are pin to pin compatible -- * * This application will read a number from a remote text file and change the * color of the onboard LED from green to red if the number is >0, and vice * versa. * * The number in the remote file represents the number of unread emails with * subject equal to [EECS 149/249] in Antonio's account. * The remote text file is written by a server script * (https://github.com/ianno/eecs149_notifier). * * This application uses the following libraries: * - cc3000_hostdriver_mbedsocket * (http://developer.mbed.org/users/Kojto/code/cc3000_hostdriver_mbedsocket/) * - HTTPClient (http://developer.mbed.org/users/donatien/code/HTTPClient/) */ #include "mbed.h" #include "cc3000.h" #include "main.h" #include "HTTPClient.h" #define MAIL_URL "http://www.eecs.berkeley.edu/~antonio/149_count.txt" using namespace mbed_cc3000; //KL25Z wifi connection //we need to define connection pins for: //- IRQ (pin D3) //- Enable (pin D5) //- SPI CS (pin D10) //- SPI configuration: // - MOSI (pin D11) // - MISO (pin D12) // - SCLK (pin D13) //plus wifi network SSID, password, security level and smart-configuration flag. cc3000 wifi(D3, D5, D10, SPI(D11, D12, D13), "antonio", "0123456789", WPA2, false); //setup the serial connection to the host machine (used to print debug info) Serial pc(USBTX, USBRX); //global vars HTTPClient http; char str[10]; int num_emails; //directly control the green and red onboard LEDs //LEDs are internally pulled-up. To turn on a LED, set its pin to 0. DigitalOut led_red(LED_RED); DigitalOut led_green(LED_GREEN); int main() { //initially turn off both the leds. //Blue LED will be always on because it shares the connection with the SPI clock led_red = 1; led_green = 1; printf("EECS149 email notifier. \r\n"); wifi.init(); while(1) { //continuosly check connection status //If not connected, try to set up a connection if(wifi.is_connected() == false) { //try to connect if (wifi.connect() == -1) { printf("Failed to connect. Please verify connection details and try again. \r\n"); } else { printf("IP address: %s \r\n",wifi.getIPAddress()); //once connected, turn green LED on and red LED off led_red = 1; led_green = 0; } } else { //if the board is connected, fetch the remote file printf("\r\nTrying to fetch mail info... \r\n"); //GET remote file data int ret = http.get(MAIL_URL, str, 128); //analyze ret code if (!ret) { printf("Page fetched successfully - read %d characters \r\n", strlen(str)); printf("Result: %s \r\n", str); num_emails = atoi(str); if(num_emails == 0) { //no unread emails, turn the green LED on and red LED off led_red = 1; led_green = 0; } else { //unread emails. Turn the green LED off and the red one on led_red = 0; led_green = 1; } } else { //error fetching remote file printf("Error - ret = %d - HTTP return code = %d \r\n", ret, http.getHTTPResponseCode()); } } //poll the remote file every 5 sec wait(5.0); } }