im using HC-05 to communicate with EEG sensor, i'm using the below code for that With arduino MEGA. But nothing prints in serial monitor why?
int LED = 8; // yellow one
int LED1 = 7; //white one
int BAUDRATE = 57600;
// checksum variables
byte payloadChecksum = 0;
byte CalculatedChecksum;
byte checksum = 0; //data type byte stores an 8-bit unsigned number, from 0 to 255
int payloadLength = 0;
byte payloadData[64] = {0};
byte poorQuality = 0;
byte attention = 0;
byte meditation = 0;
// system variables
long lastReceivedPacket = 0;
boolean bigPacket = false;
boolean brainwave = false;
void setup() {
pinMode(LED, OUTPUT);
pinMode(LED1, OUTPUT);
digitalWrite(LED, HIGH); // hello sequence
delay(100);
digitalWrite(LED, LOW);
delay(100);
Serial.begin(57600);
delay(500);
Serial1.begin(57600);
delay(500);
Serial1.print("Communicating... ");
Serial1.println();
}
byte ReadOneByte() {
int ByteRead;
// Wait until there is data
while(!Serial.available());
//Get the number of bytes (characters) available for reading from the serial port.
//This is data that's already arrived and stored in the serial receive buffer (which holds 64 bytes)
ByteRead = Serial.read();
return ByteRead; // read incoming serial data
}
unsigned int delta_wave = 0;
unsigned int theta_wave = 0;
unsigned int low_alpha_wave = 0;
unsigned int high_alpha_wave = 0;
unsigned int low_beta_wave = 0;
unsigned int high_beta_wave = 0;
unsigned int low_gamma_wave = 0;
unsigned int mid_gamma_wave = 0;
void read_waves(int i) {
delta_wave = read_3byte_int(i);
i+=3;
theta_wave = read_3byte_int(i);
i+=3;
low_alpha_wave = read_3byte_int(i);
i+=3;
high_alpha_wave = read_3byte_int(i);
i+=3;
low_beta_wave = read_3byte_int(i);
i+=3;
high_beta_wave = read_3byte_int(i);
i+=3;
low_gamma_wave = read_3byte_int(i);
i+=3;
mid_gamma_wave = read_3byte_int(i);
}
int read_3byte_int(int i) {
return ((payloadData << 16) + (payloadData[i+1] << 8) + payloadData[i+2]);
}
void loop() {
- // Look for sync bytes*
- // Byte order: 0xAA, 0xAA, payloadLength, payloadData,*
- // Checksum (sum all the bytes of payload, take lowest 8 bits, then bit inverse on lowest*
if(ReadOneByte() == 0xAA) {
if(ReadOneByte() == 0xAA) {
payloadLength = ReadOneByte();
if(payloadLength > 169) //Payload length can not be greater than 169
return;
payloadChecksum = 0; - for(int i = 0; i < payloadLength; i++) { //loop until payload length is complete*
_ payloadData = ReadOneByte(); //Read payload_
_ payloadChecksum += payloadData*;
}
checksum = ReadOneByte(); //Read checksum byte from stream*
* payloadChecksum = 255 - payloadChecksum; //Take one’s compliment of generated checksum*
* if(checksum == payloadChecksum) {
poorQuality = 200;
attention = 0;
meditation = 0;
}
brainwave = false;
for(int i = 0; i < payloadLength; i++) { // Parse the payload*
switch (payloadData*) {
case 02:
i++;
poorQuality = payloadData;
bigPacket = true;
break;
case 04:
i++;
attention = payloadData;
break;
case 05:
i++;
meditation = payloadData;
break;
case 0x80:
i = i + 3;
break;
case 0x83: // ASIC EEG POWER INT*
* i++;
brainwave = true;
byte vlen = payloadData;
//Serial1.print(vlen, DEC);
//Serial1.println();_
read_waves(i+1);
_ i += vlen; // i = i + vlen*
* break;
} // switch*
* } // for loop*
* if(bigPacket) {
if(poorQuality == 0){
}
else{ // do nothing*
* }
}
if(brainwave && attention > 0 && attention < 100) {
Serial1.print("Attention value is: ");
Serial1.print(attention, DEC);
Serial1.println();
Serial1.print("Delta value is: ");_
Serial1.print(delta_wave, DEC);
_ Serial1.println();
Serial1.print("Theta value is: ");_
Serial1.print(theta_wave, DEC);
_ Serial1.println();
Serial1.print("Low Alpha value is: ");_
Serial1.print(low_alpha_wave, DEC);
_ Serial1.println();
Serial1.print("High Alpha value is: ");_
Serial1.print(high_alpha_wave, DEC);
_ Serial1.println();
Serial1.print("Alertness value1 is: ");_
Serial1.print(low_beta_wave, DEC);
_ Serial1.println();
Serial1.print("Alertness value2 is: ");_
Serial1.print(high_beta_wave, DEC);
_ Serial1.println(); _
Serial1.print(low_gamma_wave, DEC);
_ Serial1.println();_
Serial1.print(mid_gamma_wave, DEC);
_ Serial1.println();
}
if(attention > 40){
digitalWrite(LED1, HIGH);
}
else*
* digitalWrite(LED1, LOW);
}
}
}*_
