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2025-05-27 16:42:53 +02:00
parent caf5488b06
commit 381cf85336
18 changed files with 626 additions and 78 deletions
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sound_meter/old/sound_meter Normal file
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/*
Code pour lire la data du I2C decibel meter
Pour compiler le code: gcc -o sound_meter sound_meter.c
Connexion I2C:
SDA to Pi Pico GPIO 2
SCL to Pi Pico GPIO 3
Device connected on addr 0x48
to start the script:
sudo /var/www/nebuleair_pro_4g/sound_meter/sound_meter
0x00 : VERSION register
0x01 : Device ID (byte 1)
0x02 : Device ID
0x03 : Device ID
0x04 : Device ID (byte 4)
0x05 : SKRATCH register
0x06 : CONTROL register
0x07 : TAVG high register
0x08 : TAVG low register
0x09 : RESET register
0x0A : Decibel register (Latest sound intensity value in decibels, averaged over the last Tavg time period.)
0x0B : Min register (Minimum value of decibel reading captured since power-up or manual reset of MIN/MAX registers.)
0x0C : Max register (Maximum value of decibel reading captured since power-up or manual reset of MIN/MAX registers.)
#Le Tavg est programmé sur 2 octets: le high byte et le low byte.
0x07 #Averaging time (high byte) in milliseconds for calculating sound intensity levels. (default 0x03 -> 3)
0x08 #Averaging time (low byte) in milliseconds for calculating sound intensity levels. (default 0xE8 -> 232)
valeur = (Tavg_high x 256) + Tavg_low
= (3 * 256) + 232
= 1000 ms
= 1 s
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
int main()
{
int file;
char data;
// Open I2C1 for reading the sound meter module registers
if ((file = open("/dev/i2c-1", O_RDWR)) < 0)
{
perror("Failed to open I2C1!");
exit(1);
}
// 0x48 is the decibel meter I2C address
if (ioctl(file, I2C_SLAVE, 0x48) < 0)
{
perror("db Meter module is not connected/recognized at I2C addr = 0x48");
close(file);
exit(1);
}
// Decibel value is stored in register 0x0A
data = 0x0A;
// Write the register address (0x0A) to the device
if (write(file, &data, 1) != 1)
{
perror("Failed to write register 0x0A");
close(file);
exit(1);
}
// Read one byte from the device
if (read(file, &data, 1) != 1)
{
perror("Failed to read register 0x0A");
close(file);
exit(1);
}
// Display the sound level
printf("%d\n", data);
// Close the I2C connection
close(file);
return 0;
}

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sound_meter/old/sound_meter_moving_avg.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#define MAX_MEASURES 60 // To store 60 sound level measurements
int main()
{
int file;
char data;
int soundLevels[MAX_MEASURES];
int index = 0;
int sum = 0;
int i;
FILE *fileOutput; // File pointer for writing to file
// Initialize the soundLevels array
for (i = 0; i < MAX_MEASURES; i++) {
soundLevels[i] = 0;
}
// Open I2C1 for reading the sound meter module registers
if ((file = open("/dev/i2c-1", O_RDWR)) < 0)
{
perror("Failed to open I2C1!");
exit(1);
}
// 0x48 is the decibel meter I2C address
if (ioctl(file, I2C_SLAVE, 0x48) < 0)
{
perror("db Meter module is not connected/recognized at I2C addr = 0x48");
close(file);
exit(1);
}
while (1)
{
// Decibel value is stored in register 0x0A
data = 0x0A;
// Write: send 1 byte from data (memory address pointer) to file
if (write(file, &data, 1) != 1)
{
perror("Failed to write register 0x0A");
close(file);
exit(1);
}
// Read the sound level from register 0x0A
if (read(file, &data, 1) != 1)
{
perror("Failed to read register 0x0A");
close(file);
exit(1);
}
// Insert the new reading into the array
sum -= soundLevels[index]; // Subtract the old value to maintain the sum
soundLevels[index] = data; // Store the new value
sum += soundLevels[index]; // Add the new value to the sum
// Move to the next index, wrap around if needed
index = (index + 1) % MAX_MEASURES;
// Calculate the moving average (sum of the last 60 values)
int movingAverage = sum / MAX_MEASURES;
// Find the max and min values in the soundLevels array
int max = soundLevels[0];
int min = soundLevels[0];
for (i = 1; i < MAX_MEASURES; i++)
{
if (soundLevels[i] > max) {
max = soundLevels[i];
}
if (soundLevels[i] < min) {
min = soundLevels[i];
}
}
// Open the file to write the moving average (overwrite)
fileOutput = fopen("/var/www/nebuleair_pro_4g/sound_meter/moving_avg_minute.txt", "w");
if (fileOutput == NULL)
{
perror("Failed to open file for writing");
close(file);
exit(1);
}
// Write the moving average to the file
fprintf(fileOutput, "%d %d %d\n", movingAverage, max, min);
// Close the file after writing
fclose(fileOutput);
// Display the current sound level and the moving average
printf("Current Sound level: %d\n", data);
printf("Current index: %d\n", index);
printf("Sound levels array: ");
for (i = 0; i < MAX_MEASURES; i++)
{
printf("%d ", soundLevels[i]);
}
printf("\nMax Sound level: %d\n", max);
printf("Min Sound level: %d\n", min);
printf("Moving Average (Last 60 seconds): %d\n\n", movingAverage);
// Wait for 1 second before taking the next measurement
sleep(1);
}
close(file);
return 0;
}

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/*
Code pour lire la data du I2C decibel meter
Pour compiler le code: gcc -o sound_meter sound_meter.c
Connexion I2C:
SDA to Pi Pico GPIO 2
SCL to Pi Pico GPIO 3
Device connected on addr 0x48
0x0A : Decibel register (Latest sound intensity value in decibels, averaged over the last Tavg time period.)
0x0B : Min register (Minimum value of decibel reading captured since power-up or manual reset of MIN/MAX registers.)
0x0C : Max register (Maximum value of decibel reading captured since power-up or manual reset of MIN/MAX registers.)
#Le Tavg est programmé sur 2 octets: le high byte et le low byte.
valeur = (Tavg_high x 256) + Tavg_low
0x07 #Averaging time (high byte) in milliseconds for calculating sound intensity levels. (default 0x03)
0x08 #Averaging time (low byte) in milliseconds for calculating sound intensity levels. (default 0xE8)
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
int main()
{
int file;
char data;
// Open I2C1 for reading the sound meter module registers
if ((file = open("/dev/i2c-1", O_RDWR)) < 0)
{
perror("Failed to open I2C1!");
exit(1);
}
// 0x48 is the decibel meter I2C address
if (ioctl (file, I2C_SLAVE, 0x48) < 0)
{
perror ("db Meter module is not connected/recognized at I2C addr = 0x48");
close (file);
exit (1);
}
while (1)
{
// Decibel value is stored in register 0x0A
data = 0x0A;
//write: send 1 byte from data (memory address pointer) to file
if (write (file, &data, 1) != 1)
{
perror ("Failed to write register 0x0A");
close (file);
exit (1);
}
if (read (file, &data, 1) != 1)
{
perror ("Failed to read register 0x0A");
close (file);
exit (1);
}
printf ("Sound level: %d dB SPL\r\n\r\n", data);
sleep (1);
}
close (file);
return 0;
}