Air Preasure Sensor
[1] Pembukaan
[2] Wiring
1. BMP390L with ESP32
2. BMP390L with Mini PC
[3] Code
1. Arduino IDE
#include <DFRobot_BMP3XX.h>
DFRobot_BMP390L_IIC sensor(&Wire, sensor.eSDOVDD);
#define CALIBRATE_ABSOLUTE_DIFFERENCE
void setup(void)
{
Serial.begin(115200);
int rslt;
while( ERR_OK != (rslt = sensor.begin()) ){
if(ERR_DATA_BUS == rslt){
Serial.println("Data bus error!!!");
}else if(ERR_IC_VERSION == rslt){
Serial.println("Chip versions do not match!!!");
}
delay(3000);
}
Serial.println("Begin ok!");
while( !sensor.setSamplingMode(sensor.eUltraPrecision) ){
Serial.println("Set samping mode fail, retrying....");
delay(3000);
}
delay(100);
#ifdef CALIBRATE_ABSOLUTE_DIFFERENCE
/**
* Calibrate the sensor according to the current altitude
* In this example, we use an altitude of 540 meters in Wenjiang District of Chengdu (China).
* Please change to the local altitude when using it.
* If this interface is not called, the measurement data will not eliminate the absolute difference.
* Notice: This interface is only valid for the first call.
*/
if( sensor.calibratedAbsoluteDifference(540.0) ){
Serial.println("Absolute difference base value set successfully!");
}
#endif
/* Get the sampling period of the current measurement mode, unit: us */
float sampingPeriodus = sensor.getSamplingPeriodUS();
Serial.print("samping period : ");
Serial.print(sampingPeriodus);
Serial.println(" us");
/* Get the sampling frequency of the current measurement mode, unit: Hz */
float sampingFrequencyHz = 1000000 / sampingPeriodus;
Serial.print("samping frequency : ");
Serial.print(sampingFrequencyHz);
Serial.println(" Hz");
Serial.println();
delay(1000);
}
void loop()
{
/* Read currently measured temperature date directly, unit: °C */
float temperature = sensor.readTempC();
Serial.print("temperature : ");
Serial.print(temperature);
Serial.println(" C");
/* Directly read the currently measured pressure data, unit: pa */
float Pressure = sensor.readPressPa();
Serial.print("Pressure : ");
Serial.print(Pressure);
Serial.println(" Pa");
/* Read altitude, unit: m */
float altitude = sensor.readAltitudeM();
Serial.print("Altitude : ");
Serial.print(altitude);
Serial.println(" m");
Serial.println();
delay(1000);
}
Hasil: 
2. MicroPhyton
import time
from machine import Pin, I2C
from micropython_bmpxxx import bmpxxx
#i2c = I2C(1, sda=Pin(2), scl=Pin(3)) # Correct I2C pins for RP2040
i2c = I2C(id=1, scl=Pin(27), sda=Pin(26))
i2c1_devices = i2c.scan()
if i2c1_devices:
for d in i2c1_devices: print(f"i2c1 device at address: {hex(d)}")
else:
print("ERROR: No i2c1 devices")
print("")
bmp = bmpxxx.BMP390(i2c=i2c, address=0x76)
sea_level_pressure = bmp.sea_level_pressure
print(f"initial sea_level_pressure = {sea_level_pressure:.2f} hPa")
sea_level_pressure = bmp.sea_level_pressure
print(f"Initial sea_level_pressure = {sea_level_pressure:.2f} hPa")
# reset driver to contain the accurate sea level pressure (SLP) from my nearest airport this hour
bmp.sea_level_pressure = 1017.0
print(f"Adjusted sea level pressure = {bmp.sea_level_pressure:.2f} hPa")
# Alternatively set known altitude in meters and the sea level pressure will be calculated
bmp.altitude = 111.0
print(f"Adjusted SLP using {bmp.altitude:.2f} meter altitude = {bmp.sea_level_pressure:.2f} hPa\n")
while True:
print(f"Pressure = {bmp.pressure:.2f} hPa")
temp = bmp.temperature
print(f"temp = {temp:.2f} C")
meters = bmp.altitude
print(f"Altitude = {meters:.2f} meters")
feet = meters * 3.28084
feet_only = int(feet)
inches = int((feet - feet_only) * 12)
print(f"Altitude = {feet_only} feet {inches} inches")
time.sleep(2.5)
Hasil; 
Reverensinya bisa dilihat di sini
https://wiki.dfrobot.com/Fermion_BMP390L_Digital_Barometric_Pressure_Sensor_SKU_SEN0423
https://github.com/bradcar/MicroPython_BMPxxx
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