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Arduino WiFi Shield Guide for Ubiquitous Computing

Explore the functionalities and applications of Arduino WiFi Shield for seamless connectivity in ubiquitous computing practices. Learn how to set up and utilize this recommended shield effectively.

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Arduino WiFi Shield Guide for Ubiquitous Computing

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  1. Ubiquitous Computing Practice(Wi-Fi) Youn-Hee Han, Chan-Myung Kim {yhhan, cmdr}@koreatech.ac.kr Laboratory of Intelligent NetworksAdvanced Technology Research CenterKorea University of Technology http://link.koreatech.ac.kr

  2. Introduction Arduino – Wifi Shield (Recommended)

  3. Introduction SparkfunWifly Shield ArduinoWifi Shield (Recommended)

  4. ArduinoWiFi Shield http://arduino.cc/en/Main/ArduinoWiFiShield

  5. Wifi Library • Wifi • begin() • disconnect() • SSID() • RSSI() • … • Server • begin() • available() • write() • println() • … • Client • connected() • connect() • print() • println() • available() • read() • stop() • … http://arduino.cc/en/Reference/WiFi

  6. Post Tweet • . http://arduino-tweet.appspot.com/

  7. Setup if (WiFi.status() == WL_NO_SHIELD) { Serial.println("WiFi shield not present"); while(true); } while ( status != WL_CONNECTED) { Serial.print("Attempting to connect to SSID: "); Serial.println(ssid); status = WiFi.begin(ssid, key); delay(5000); }

  8. Encryption • Open (No Encryption) char ssid[] = "yourNetwork"; int status = WiFi.begin(ssid); • WPA char ssid[] = "yourNetwork"; char pw[] = “yourPassword"; intstatus = WiFi.begin(ssid, pw); • WEP char ssid[] = "yourNetwork"; char key[] = "D0D0DEADF00DABBADEAFBEADED"; // asciicode intkeyIndex = 0; intstatus = WiFi.begin(ssid, keyIndex, key);

  9. Post Tweet • . char server_adr[] = "arduino-tweet.appspot.com"; char[] token = “2E6p1VBvd7oA3S9xPjmHYB7fB4xbEvIf8”; String tweet = “트윗 내용”; if (twtclient.connect(server_adr, 80)) { Serial.println("connected"); twtclient.println("POST http://arduino-tweet.appspot.com/update HTTP/1.0"); twtclient.print("Content-Length: "); twtclient.println(tweet.length()+strlen(token)+14); twtclient.println(); twtclient.print("token="); twtclient.print(token); twtclient.print("&status="); twtclient.println(tweet); }

  10. Temperature + humidity

  11. Temperature + humidity int indata0; int indata1; float RH; float sRH; float temperatureC; indata0 = analogRead(0); sRH= (indata0 / 1024.0) /0.0062 - 0.16 / 0.0062; temperatureC= analogRead(1) * 0.004882814; temperatureC= (temperatureC - 0.5) * 100; RH = sRH / (1.0546 - 0.00216 * temperatureC);

  12. Indices • Discomfort Index • 1.8 * temperatureC - 0.55 * (1 - RH/100.0) * (1.8 * temperatureC - 26) + 32 • Food Poisoning Index • (1-exp(-exp(-4.4946+0.0701*temperatureC+0.0152*RH)))*185.66+26.14 • Deterioration Index • ((RH-65)/14)*pow(1.054, temperatureC) http://www.kma.go.kr/weather/lifenindustry/life_01.jsp?JISU_INFO=life3_03

  13. Post Tweet • .

  14. Thank You

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