I need help to set up d6t-44l-06 sensor. Am trying to configure the sensor to detect human presence and light up an LED ON and OFF ten times. I was trying to modify the code from MIT but i dont understand most of its parts...Help ASAP
#include <Wire.h>
/* defines */
#define D6T_ADDR 0x0A // for I2C 7bit address
#define D6T_CMD 0x4C // for D6T-44L-06/06H, D6T-8L-09/09H, for D6T-1A-01/02
#define N_ROW 4
#define N_PIXEL (4 * 4)
#define N_READ ((N_PIXEL + 1) * 2 + 1)
const int led = 7;
uint8_t rbuf[N_READ];
double ptat;
double pix_data[N_PIXEL];
uint8_t calc_crc(uint8_t data) {
int index;
uint8_t temp;
for (index = 0; index < 8; index++) {
temp = data;
data <<= 1;
if (temp & 0x80) {data ^= 0x07;}
}
return data;
}
/** <!-- D6T_checkPEC {{{ 1--> D6T PEC(Packet Error Check) calculation.
* calculate the data sequence,
* from an I2C Read client address (8bit) to thermal data end.
*/
bool D6T_checkPEC(uint8_t buf[], int n) {
int i;
uint8_t crc = calc_crc((D6T_ADDR << 1) | 1); // I2C Read address (8bit)
for (i = 0; i < n; i++) {
crc = calc_crc(buf[i] ^ crc);
}
bool ret = crc != buf[n];
if (ret) {
Serial.print("PEC check failed:");
Serial.print(crc, HEX);
Serial.print("(cal) vs ");
Serial.print(buf[n], HEX);
Serial.println("(get)");
}
return ret;
}
/** <!-- conv8us_s16_le {{{1 --> convert a 16bit data from the byte stream.
*/
int16_t conv8us_s16_le(uint8_t* buf, int n) {
uint16_t ret;
ret = (uint16_t)buf[n];
ret += ((uint16_t)buf[n + 1]) << 8;
return (int16_t)ret; // and convert negative.
}
/** <!-- setup {{{1 -->
* 1. Initialize
- initialize a Serial port for output.
- initialize I2C.
*/
void setup() {
Serial.begin(9600); // Serial baudrate = 9600bps
Wire.begin(); // i2c master
delay(620);
pinMode(led, OUTPUT);
}
/** <!-- loop - Thermal sensor {{{1 -->
* 2. read data.
*/
void loop() {
int i = 0;
int16_t itemp = 0;
// Read data via I2C
// I2C buffer of "Arduino MKR" is 256 buffer. (It is enough)
memset(rbuf, 0, N_READ);
Wire.beginTransmission(D6T_ADDR); // I2C slave address
Wire.write(D6T_CMD); // D6T register
Wire.endTransmission();
delay(1);
Wire.requestFrom(D6T_ADDR, N_READ);
while (Wire.available()) {
rbuf[i++] = Wire.read();
}
D6T_checkPEC(rbuf, N_READ - 1);
//Convert to temperature data (degC)
ptat = (double)conv8us_s16_le(rbuf, 0) / 10.0;
for (i = 0; i < N_PIXEL; i++) {
itemp = conv8us_s16_le(rbuf, 2 + 2*i);
pix_data[i] = (double)itemp / 10.0;
}
//Output results
Serial.print("PTAT:");
Serial.print(ptat, 1);
Serial.print(" [degC], Temperature: ");
for (i = 0; i < N_PIXEL; i++) {
Serial.print(pix_data[i], 1);
Serial.print(", ");
}
Serial.println(" [degC]");
if(pix_data[i]==30){
for(int h=0;h<10;h++){
digitalWrite(led, HIGH);
delay(100);
digitalWrite(led, LOW);
delay(100);
}
}
}
// vi: ft=arduino:fdm=marker:et:sw=4:tw=80
