### Get Sensor Status Example

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

This example shows how to retrieve the sensor's status register using `getStatus()`. It helps in checking measurement and NVM data update states, which is useful for polling-based applications. Requires Wire and Adafruit_BMP280 libraries.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  uint8_t status = bmp.getStatus();

  Serial.print(F("Status register: 0x"));
  Serial.println(status, HEX);

  // Bit 3: measuring - set when conversion is running
  // Bit 0: im_update - set when NVM data is being copied

  if (status & 0x08) {
    Serial.println(F("  - Measurement in progress"));
  } else {
    Serial.println(F("  - Measurement complete"));
  }

  if (status & 0x01) {
    Serial.println(F("  - NVM data copy in progress"));
  } else {
    Serial.println(F("  - NVM data ready"));
  }

  Serial.println();
  delay(1000);
}

// Expected output:
// Status register: 0x00
//   - Measurement complete
//   - NVM data ready

```

--------------------------------

### Complete Weather Station Example

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

This comprehensive example integrates all sensor readings with error handling for a basic weather station. It requires the Wire library and Adafruit_BMP280 library. Adjust `seaLevelPressure_hPa` to your local conditions.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

// Adjust to your local sea level pressure (check weather station)
float seaLevelPressure_hPa = 1013.25;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  Serial.println(F("=== BMP280 Weather Station ==="));
  Serial.println();

  if (!bmp.begin()) {
    Serial.println(F("ERROR: BMP280 sensor not found!"));
    Serial.print(F("Sensor ID: 0x"));
    Serial.println(bmp.sensorID(), HEX);
    while (1) delay(10);
  }

  Serial.print(F("Sensor ID: 0x"));
  Serial.println(bmp.sensorID(), HEX);

  // High accuracy configuration
  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);

  Serial.println(F("Sensor initialized successfully!"));
  Serial.println();
}

void loop() {
  // Read all values
  float temperature = bmp.readTemperature();
  float pressure = bmp.readPressure();
  float altitude = bmp.readAltitude(seaLevelPressure_hPa);
  float seaLevel = bmp.seaLevelForAltitude(altitude, pressure / 100.0);
  float boilingPoint = bmp.waterBoilingPoint(pressure / 100.0);

  Serial.println(F("--- Weather Data ---"));

  // Temperature
  Serial.print(F("Temperature: "));
  Serial.print(temperature, 2);
  Serial.print(F(" C / "));
  Serial.print(temperature * 9.0 / 5.0 + 32.0, 2);
  Serial.println(F(" F"));

  // Pressure
  Serial.print(F("Pressure: "));
  Serial.print(pressure / 100.0, 2);
  Serial.print(F(" hPa / "));
  Serial.print(pressure / 3386.39, 2);
  Serial.println(F(" inHg"));

  // Altitude
  Serial.print(F("Altitude: "));
  Serial.print(altitude, 2);
  Serial.print(F(" m / "));
  Serial.print(altitude * 3.28084, 2);
  Serial.println(F(" ft"));

  // Sea level pressure
  Serial.print(F("Sea Level Pressure: "));
  Serial.print(seaLevel, 2);
  Serial.println(F(" hPa"));

  // Water boiling point
  Serial.print(F("Water Boiling Point: "));
  Serial.print(boilingPoint, 2);
  Serial.println(F(" C"));

  Serial.println();
  delay(5000);
}

// Expected output:
// === BMP280 Weather Station ===
//
// Sensor ID: 0x58
// Sensor initialized successfully!
//
// --- Weather Data ---
// Temperature: 24.56 C / 76.21 F
// Pressure: 1012.34 hPa / 29.90 inHg
// Altitude: 7.59 m / 24.90 ft
// Sea Level Pressure: 1013.25 hPa
// Water Boiling Point: 99.97 C

```

--------------------------------

### Sensor Reset Example

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Demonstrates how to perform a soft reset of the BMP280 sensor using the `reset()` function. After resetting, the sensor must be re-initialized using `begin()`. This example requires the Wire and Adafruit_BMP280 libraries.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  Serial.println(F("Sensor initialized"));

  // Read initial value
  Serial.print(F("Temperature: "));
  Serial.println(bmp.readTemperature());

  // Reset the sensor
  Serial.println(F("Performing soft reset..."));
  bmp.reset();
  delay(100);

  // Re-initialize after reset
  if (!bmp.begin()) {
    Serial.println(F("Re-initialization failed!"));
    while (1) delay(10);
  }

  Serial.println(F("Sensor re-initialized after reset"));

  // Read value after reset
  Serial.print(F("Temperature: "));
  Serial.println(bmp.readTemperature());
}

void loop() {}

```

--------------------------------

### Forced Mode Operation

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Utilizes forced mode for low-power applications where measurements are taken on demand. The sensor sleeps between measurements, waking only when `takeForcedMeasurement()` is called. Ensure the sensor is configured for forced mode in `setup()`.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  Serial.println(F("BMP280 Forced Mode Test"));

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  // Configure for FORCED mode - sensor sleeps between measurements
  bmp.setSampling(Adafruit_BMP280::MODE_FORCED,     // Forced mode for low power
                  Adafruit_BMP280::SAMPLING_X2,     // Temperature oversampling
                  Adafruit_BMP280::SAMPLING_X16,    // Pressure oversampling
                  Adafruit_BMP280::FILTER_X16,      // Filtering
                  Adafruit_BMP280::STANDBY_MS_500); // Standby (not used in forced mode)
}

void loop() {
  // Wake sensor and take measurement - blocks until complete
  if (bmp.takeForcedMeasurement()) {
    // Read the new measurement data
    Serial.print(F("Temperature = "));
    Serial.print(bmp.readTemperature());
    Serial.println(" *C");

    Serial.print(F("Pressure = "));
    Serial.print(bmp.readPressure());
    Serial.println(" Pa");

    Serial.print(F("Approx altitude = "));
    Serial.print(bmp.readAltitude(1013.25));
    Serial.println(" m");

    Serial.println();
  } else {
    Serial.println("Forced measurement failed!");
  }

  delay(2000);
}

// Expected output:
// Temperature = 23.45 *C
// Pressure = 101250.00 Pa
// Approx altitude = 6.25 m
```

--------------------------------

### Unified Sensor Interface

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Leverages the Adafruit Unified Sensor interface for standardized sensor events, ensuring compatibility with other Adafruit sensors and consistent data structures. Requires initialization of temperature and pressure sensors.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;
Adafruit_Sensor *bmp_temp = bmp.getTemperatureSensor();
Adafruit_Sensor *bmp_pressure = bmp.getPressureSensor();

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  Serial.println(F("BMP280 Unified Sensor Test"));

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);

  // Print sensor details
  bmp_temp->printSensorDetails();
}

void loop() {
  sensors_event_t temp_event, pressure_event;

  // Get sensor events
  bmp_temp->getEvent(&temp_event);
  bmp_pressure->getEvent(&pressure_event);

  Serial.print(F("Temperature = "));
  Serial.print(temp_event.temperature);
  Serial.println(" *C");

  Serial.print(F("Pressure = "));
  Serial.print(pressure_event.pressure);  // Already in hPa
  Serial.println(" hPa");

  Serial.println();
  delay(2000);
}

// Expected output:
// Sensor: BMP280
// Type: Ambient Temp (C)
// Driver Ver: 1
// Min Value: -40.00
// Max Value: 85.00
// Resolution: 0.01
//
// Temperature = 24.12 *C
// Pressure = 1012.50 hPa
```

--------------------------------

### Initialize BMP280 Sensor with I2C

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Initializes the BMP280 sensor using the default I2C address (0x77). Ensure the Wire library is included and the sensor is connected via I2C.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp; // Create sensor object using I2C

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100); // Wait for native USB

  Serial.println(F("BMP280 test"));

  // Initialize with default I2C address (0x77)
  unsigned status = bmp.begin();

  // Alternative: use alternate address
  // status = bmp.begin(BMP280_ADDRESS_ALT, BMP280_CHIPID);

  if (!status) {
    Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
    Serial.print("SensorID was: 0x");
    Serial.println(bmp.sensorID(), 16);
    Serial.print("ID of 0xFF probably means a bad address\n");
    Serial.print("ID of 0x56-0x58 represents a BMP 280\n");
    Serial.print("ID of 0x60 represents a BME 280\n");
    Serial.print("ID of 0x61 represents a BME 680\n");
    while (1) delay(10);
  }

  Serial.println("BMP280 initialized successfully!");
}

void loop() {}
```

--------------------------------

### Initialize BMP280 Sensor with Hardware SPI

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Initializes the BMP280 sensor using hardware SPI for faster communication. Requires defining the chip select pin.

```cpp
#include <SPI.h>
#include <Adafruit_BMP280.h>

#define BMP_CS (10)  // Chip select pin

Adafruit_BMP280 bmp(BMP_CS); // Hardware SPI with default SPI object

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("Could not find a valid BMP280 sensor!"));
    while (1) delay(10);
  }

  Serial.println("BMP280 initialized via Hardware SPI!");
}

void loop() {}
```

--------------------------------

### Initialize BMP280 Sensor with Software SPI

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Initializes the BMP280 sensor using software SPI (bit-bang) by specifying all four SPI pins. This method is useful when hardware SPI pins are unavailable.

```cpp
#include <Adafruit_BMP280.h>

#define BMP_SCK  (13)  // Clock pin
#define BMP_MISO (12)  // Master In Slave Out
#define BMP_MOSI (11)  // Master Out Slave In
#define BMP_CS   (10)  // Chip select

Adafruit_BMP280 bmp(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK); // Software SPI

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("Could not find a valid BMP280 sensor!"));
    while (1) delay(10);
  }

  Serial.println("BMP280 initialized via Software SPI!");
}

void loop() {}
```

--------------------------------

### Configure BMP280 Sampling Parameters

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Configures the sensor's operating mode, oversampling rates for temperature and pressure, filtering, and standby duration. This allows fine-tuning for specific application requirements.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  // Configure sampling parameters
  bmp.setSampling(
    Adafruit_BMP280::MODE_NORMAL,     // Operating Mode: SLEEP, FORCED, or NORMAL
    Adafruit_BMP280::SAMPLING_X2,     // Temperature oversampling: NONE, X1, X2, X4, X8, X16
    Adafruit_BMP280::SAMPLING_X16,    // Pressure oversampling: NONE, X1, X2, X4, X8, X16
    Adafruit_BMP280::FILTER_X16,      // Filtering: OFF, X2, X4, X8, X16
    Adafruit_BMP280::STANDBY_MS_500   // Standby: 1, 63, 125, 250, 500, 1000, 2000, 4000 ms
  );

  Serial.println("Sampling configured: Normal mode, 2x temp, 16x pressure, 16x filter, 500ms standby");
}

void loop() {}
```

--------------------------------

### Calculate Sea Level Pressure (QNH) with BMP280

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Calculates the sea-level pressure (QNH) using `seaLevelForAltitude()`, given your known altitude and current atmospheric pressure. Useful for calibration. Ensure the sensor is initialized.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

// Your known altitude in meters (e.g., from GPS or survey)
#define KNOWN_ALTITUDE 150.0

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  // Read current atmospheric pressure in hPa
  float atmospheric = bmp.readPressure() / 100.0;

  // Calculate sea level pressure based on known altitude
  float seaLevel = bmp.seaLevelForAltitude(KNOWN_ALTITUDE, atmospheric);

  Serial.print(F("Atmospheric pressure (QFE) = "));
  Serial.print(atmospheric);
  Serial.println(" hPa");

  Serial.print(F("Sea level pressure (QNH) = "));
  Serial.print(seaLevel);
  Serial.println(" hPa");

  delay(2000);
}

// Expected output:
// Atmospheric pressure (QFE) = 995.67 hPa
// Sea level pressure (QNH) = 1013.25 hPa

```

--------------------------------

### Read Temperature from BMP280

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Reads the current temperature in Celsius and Fahrenheit. Ensure the BMP280 sensor is initialized and sampling is configured.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  float temperature = bmp.readTemperature();

  Serial.print(F("Temperature = "));
  Serial.print(temperature);
  Serial.println(" *C");

  // Convert to Fahrenheit
  float tempF = temperature * 9.0 / 5.0 + 32.0;
  Serial.print(F("Temperature = "));
  Serial.print(tempF);
  Serial.println(" *F");

  delay(2000);
}

// Expected output:
// Temperature = 24.56 *C
// Temperature = 76.21 *F

```

--------------------------------

### Read Barometric Pressure from BMP280

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Reads atmospheric pressure in Pascals and converts it to hectopascals (hPa) and inches of mercury (inHg). Ensure the sensor is initialized.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  float pressure = bmp.readPressure();

  Serial.print(F("Pressure = "));
  Serial.print(pressure);
  Serial.println(" Pa");

  // Convert to hPa (hectopascals) / mbar
  Serial.print(F("Pressure = "));
  Serial.print(pressure / 100.0);
  Serial.println(" hPa");

  // Convert to inches of mercury (inHg)
  Serial.print(F("Pressure = "));
  Serial.print(pressure / 3386.39);
  Serial.println(" inHg");

  delay(2000);
}

// Expected output:
// Pressure = 101325.00 Pa
// Pressure = 1013.25 hPa
// Pressure = 29.92 inHg

```

--------------------------------

### Calculate Water Boiling Point

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Calculates the boiling point of water based on current atmospheric pressure. Useful for high-altitude cooking or science experiments. Requires the Adafruit BMP280 library and I2C initialization.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  // Read pressure in hPa
  float pressure_hPa = bmp.readPressure() / 100.0;

  // Calculate boiling point at current pressure
  float boilingPoint = bmp.waterBoilingPoint(pressure_hPa);

  Serial.print(F("Current pressure = "));
  Serial.print(pressure_hPa);
  Serial.println(" hPa");

  Serial.print(F("Water boiling point = "));
  Serial.print(boilingPoint);
  Serial.println(" *C");

  delay(5000);
}

// Expected output at sea level:
// Current pressure = 1013.25 hPa
// Water boiling point = 100.00 *C

// Expected output at high altitude (e.g., Denver ~1600m):
// Current pressure = 835.00 hPa
// Water boiling point = 94.40 *C
```

--------------------------------

### Calculate Altitude from BMP280

Source: https://context7.com/adafruit/adafruit_bmp280_library/llms.txt

Calculates approximate altitude in meters and feet using `readAltitude()`. Requires the current sea-level pressure in hPa for accuracy. Ensure the sensor is initialized.

```cpp
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

// Standard sea level pressure in hPa
// Adjust this value based on local weather station data for accuracy
#define SEALEVELPRESSURE_HPA (1013.25)

void setup() {
  Serial.begin(9600);
  while (!Serial) delay(100);

  if (!bmp.begin()) {
    Serial.println(F("BMP280 not found!"));
    while (1) delay(10);
  }

  bmp.setSampling(Adafruit_BMP280::MODE_NORMAL,
                  Adafruit_BMP280::SAMPLING_X2,
                  Adafruit_BMP280::SAMPLING_X16,
                  Adafruit_BMP280::FILTER_X16,
                  Adafruit_BMP280::STANDBY_MS_500);
}

void loop() {
  float altitude = bmp.readAltitude(SEALEVELPRESSURE_HPA);

  Serial.print(F("Approx altitude = "));
  Serial.print(altitude);
  Serial.println(" m");

  // Convert to feet
  Serial.print(F("Approx altitude = "));
  Serial.print(altitude * 3.28084);
  Serial.println(" ft");

  delay(2000);
}

// Expected output:
// Approx altitude = 125.50 m
// Approx altitude = 411.74 ft

```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.