rodneyosodo
commented
3 years ago Closed rodneyosodo closed 3 years ago
rodneyosodo
commented
3 years ago 
kimanimichael
commented
3 years ago #include <SD.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_BMP085.h>
Adafruit_BMP085 bmp;
#define seaLevelPressure_hPa 1024
const int chipSelect = PA4;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
Serial.print("\nInitializing SD card...");
// we'll use the initialization code from the utility libraries
// since we're just testing if the card is working!
if (!SD.begin(chipSelect)) {
Serial.println("initialization failed.");
while (1);
} else {
Serial.println("Wiring is correct and a card is present.");
}
Serial.println("initialization done.");
startWriting();
}
void loop()
{
Write_SDcard();
Serial.print("ALtitude = ");
Serial.println(bmp.readAltitude(seaLevelPressure_hPa * 100));
delay(1000);
}
void startWriting()
{
File dataFile = SD.open("Altitude.txt", FILE_WRITE);
if (dataFile)
{
dataFile.println("Altitude"); //Write the first row of the excel file
dataFile.println(); //End of Row move to next row
dataFile.close();
}
}
void Write_SDcard()
{
File dataFile = SD.open("Altitude.txt", FILE_WRITE);
if (dataFile)
{
dataFile.print("Altitude = ");
dataFile.print(bmp.readAltitude(seaLevelPressure_hPa * 100)); //Store date on SD card
dataFile.println(); //End of Row move to next row
dataFile.close(); //Close the file
}
else
Serial.println("SD card writing failed");
}NEW
#include <SD.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_BMP085.h>
#include "RunningMedian.h"
#include <SimpleKalmanFilter.h>
Adafruit_BMP085 bmp;
RunningMedian samples = RunningMedian(15);
SimpleKalmanFilter pressureKalmanFilter(1, 1, 0.01);
#define seaLevelPressure_hPa 1024
#define filterSamples 13 // filterSamples should be an odd number, no smaller than 3
const int chipSelect = PA4;
int counter = 0;
long count = 0;
float sensSmoothArray1 [filterSamples]; // array for holding raw sensor values for sensor1
float rawData1, smoothData1, altitude; // variables for sensor1 data
float runmedian(float x) {
samples.add(x);
float m = samples.getMedian();
return m;
}
float digital(float x) {
smoothData1 = digitalSmooth(x, sensSmoothArray1); // every sensor you use with digitalSmooth needs its own array
return smoothData1;
}
float digitalSmooth(float rawIn, float *sensSmoothArray){ // "int *sensSmoothArray" passes an array to the function - the asterisk indicates the array name is a pointer
int j, k, temp, top, bottom;
double total;
static int i;
static int sorted[filterSamples];
boolean done;
i = (i + 1) % filterSamples; // increment counter and roll over if necc. - % (modulo operator) rolls over variable
sensSmoothArray[i] = rawIn; // input new data into the oldest slot
for (j=0; j<filterSamples; j++){ // transfer data array into anther array for sorting and averaging
sorted[j] = sensSmoothArray[j];
}
done = 0; // flag to know when we're done sorting
while(done != 1){ // simple swap sort, sorts numbers from lowest to highest
done = 1;
for (j = 0; j < (filterSamples - 1); j++){
if (sorted[j] > sorted[j + 1]){ // numbers are out of order - swap
temp = sorted[j + 1];
sorted [j+1] = sorted[j] ;
sorted [j] = temp;
done = 0;
}
}
}
bottom = max(((filterSamples * 15) / 100), 1);
top = min((((filterSamples * 85) / 100) + 1 ), (filterSamples - 1)); // the + 1 is to make up for asymmetry caused by integer rounding
k = 0;
total = 0;
for ( j = bottom; j< top; j++){
total += sorted[j]; // total remaining indices
k++;
}
return total / k; // divide by number of samples
}
float kalman(float x) {
float estimated_altitude = pressureKalmanFilter.updateEstimate(x);
return estimated_altitude;
}
void printSerial(float altitude) {
Serial.print(counter);
Serial.print(" , ");
Serial.print(altitude);
Serial.print(", ");
Serial.print(runmedian(altitude));
Serial.print(", ");
Serial.print(digital(altitude));
Serial.print(", ");
Serial.println(kalman(altitude));
}
void startWriting() {
File dataFile = SD.open("Altitude.txt", FILE_WRITE);
if (dataFile) {
dataFile.println("Altitude"); //Write the first row of the excel file
dataFile.println(); //End of Row move to next row
dataFile.close();
}
}
void Write_SDcard(float altitude) {
File dataFile = SD.open("Altitude.txt", FILE_WRITE);
if (dataFile) {
dataFile.print(counter);
dataFile.print(" , ");
dataFile.print(altitude);
dataFile.print(", ");
dataFile.print(runmedian(altitude));
dataFile.print(", ");
dataFile.print(digital(altitude));
dataFile.print(", ");
dataFile.println(kalman(altitude));
dataFile.close(); //Close the file
}
else {
Serial.println("SD card writing failed");
}
}
void setup() {
Serial.begin(9600);
if (!bmp.begin()) {
Serial.println("Could not find a valid BMP085 sensor, check wiring!");
while (1) {}
}
Serial.print("\nInitializing SD card...");
// we'll use the initialization code from the utility libraries
// since we're just testing if the card is working!
if (!SD.begin(chipSelect)) {
Serial.println("initialization failed.");
while (1);
} else {
Serial.println("Wiring is correct and a card is present.");
}
Serial.println("initialization done.");
startWriting();
}
void loop() {
altitude = bmp.readAltitude();
printSerial(altitude);
Write_SDcard(altitude);
delay(50);
counter ++;
}