The document describes code for communicating between an Android device and an Arduino. It includes code to: 1. Initialize serial communication at 9600 baud and establish contact between the devices. 2. Continuously read sensor values from analog and digital pins on the Arduino, convert them to integers, and send the values over the serial connection when data is available. 3. Read data received over serial on the Android side and write the data to the output stream to send it back to the Arduino.

1. Comunicação Android <=> Arduino

8. Comunicação serial UART/USART
void setup() {
Serial.begin(9600);
while (!Serial) {}
pinMode(2, INPUT);
establishContact();
}
void loop() {
if (Serial.available() > 0) {
firstSensor = analogRead(A0) / 4;
secondSensor = analogRead(1) / 4;
thirdSensor = map(digitalRead(2), 0, 1, 0, 255);
Serial.write(firstSensor);
Serial.write(secondSensor);
Serial.write(thirdSensor);
}
}
void establishContact() {
while (Serial.available() <= 0) {
Serial.print('A');
delay(300);
}
}
int firstSensor = 0;
int secondSensor = 0;
int thirdSensor = 0;

9. Serial.print();
ou
Serial.write();?
?

10. Serial.print();
Serial.print(2015);
“2"
“0"
“1"
“5"

11. Serial.write();
Serial.write(2015);
2015
0x07DF
00000111 11011111

12. Bluetooth

13. WiFi

14. USB

15. NFC

17. +

18. Com grandes poderes vem grandes
responsabilidades

19. Velocidade
Integridade
Segurança

20. Fale só o necessário!

21. String sensor_a = “A:” + digitalRead(5);
String sensor_b = “B:” + digitalRead(6);
String sensor_c = “C:” + digitalRead(7);
String sensor_d = “D:” + digitalRead(8);
String sensor_e = “E:” + digitalRead(9);
String sensor_f = “F:” + digitalRead(10);
Serial.println(sensor_a);
Serial.println(sensor_b);
Serial.println(sensor_c);
Serial.println(sensor_d);
Serial.println(sensor_e);
Serial.println(sensor_f);
A:1
B:0
C:1
D:1
E:0
D:1
24 bytes

22. int sensors [] = {
digitalRead(5),
digitalRead(6),
digitalRead(7),
digitalRead(8),
digitalRead(9),
digitalRead(10)
};
char states = 0x00;
for(int i = 0; i < sizeof(sensors )/sizeof(byte); i++) {
states = states | (sensors[i] << i);
}
Serial.write(states);
00101101
1 byte

23. Verifique suas coisas ao sair e ao chegar!

24. Checksum
I received: 2
I received: 51
I received: 67
I received: 48
I received: 48
I received: 67
I received: 69
I received: 55
I received: 53
I received: 52
I received: 67
I received: 67
I received: 66
I received: 3
2 51 67 48 48 67 69 55 53 52 67 67 66 3
2 51 67 48 48 67 69 55 53 52 67 67 66 3
51 67 48 48 67 69 55 53 52 67 67 66
51 67 48 48 67 69 55 53 52 67 67 66
3 C 0 0 C E 7 5 4 C C B
3C 00 CE 75 4C CB
3C ^ 00 ^ CE ^ 75 ^ 4C == CB

25. https://github.com/tzikis/ArduinoMD5/
http://excamera.com/sphinx/article-crc.html
https://github.com/vinmenn/Crc16
Checksum
MD5
CRC-16
CRC-32

26. < uses-perm ission android:nam e= "android.perm ission.BLUETO O TH" />
< uses-perm ission android:nam e= "android.perm ission.BLUETO O TH_AD M IN" />
< uses-feature android:nam e= "android.hardw are.usb.accessory" />
< uses-perm ission android:nam e= "android.perm ission.ACCESS_W IFI_STATE" />
< uses-perm ission android:nam e= "android.perm ission.CHANG E_W IFI_STATE" />
< uses-perm ission android:nam e= "android.perm ission.CHANG E_NETW O RK_STATE" />
< uses-perm ission android:nam e= "android.perm ission.INTERNET" />
< uses-perm ission android:nam e= "android.perm ission.ACCESS_NETW O RK_STATE" />
Permissões AndroidManifest.xml
Bluetooth
USB
WiFi
< uses-feature android:nam e= "android.hardw are.nfc" android:required= "true" />
< uses-perm ission android:nam e= "android.perm ission.NFC" />
NFC

27. Preparando...
private final InputStream mmInStream;
private final OutputStream mmOutStream;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;

28. public String read() {
byte[] bytes = new byte[1024];
StringBuilder x = new StringBuilder();
int numRead = 0;
while ((numRead = mmInStream.read(bytes)) >= 0) {
x.append(new String(bytes, 0, numRead));
}
}
Lendo dados...

29. public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
} catch (IOException e) { }
}
Enviando dados...

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