BMP280 Sensor Module
Overview
The BMP280 Sensor Module is a high-precision, low-power digital barometric pressure sensor module designed for use in a wide range of Internet of Things (IoT) applications. This module is based on the Bosch BMP280 sensor, which provides accurate measurements of atmospheric pressure, temperature, and altitude.
Functionality
| The BMP280 Sensor Module is designed to measure the following environmental parameters |
The module measures the absolute pressure of the surrounding environment, which can be used to calculate altitude, weather forecasting, and other applications.
The module measures the ambient temperature, which is essential for various IoT applications, such as environmental monitoring, industrial automation, and HVAC systems.
By combining the pressure and temperature measurements, the module can calculate the altitude above sea level, making it suitable for applications like drone navigation, weather stations, and GPS tracking.
Key Features
Physical Characteristics
12 mm x 12 mm x 2.5 mm (L x W x H)
1.5 g
5-pin header (VCC, GND, SCL, SDA, NC)
Power Requirements
1.71 V to 3.6 V
2.7 A (typical) at 1 Hz sampling rate
Environmental Operating Conditions
-40C to 85C
-40C to 125C
0 to 100% RH (non-condensing)
The BMP280 Sensor Module is an ideal choice for a wide range of IoT applications, including environmental monitoring, industrial automation, navigation, and more. Its high accuracy, low power consumption, and compact design make it an attractive solution for developers and engineers.
BMP280 Sensor Module DocumentationOverviewThe BMP280 Sensor Module is a high-precision, low-power digital barometric pressure sensor designed for various IoT applications. It provides accurate temperature and atmospheric pressure measurements, making it suitable for environmental monitoring, weather stations, and drones.Technical SpecificationsTemperature range: -40C to 85C
Pressure range: 300 to 1100 hPa
Resolution: 0.01 hPa (pressure), 0.01C (temperature)
Supply voltage: 1.8V to 5.5V
Communication protocol: I2C or SPI
Dimensions: 12 x 12 mmHardware ConnectionTo use the BMP280 Sensor Module, connect it to your microcontroller or development board as follows:VCC to 3.3V or 5V power supply
GND to ground
SCL (clock) to I2C clock pin (or SPI clock pin)
SDA (data) to I2C data pin (or SPI data pin)Code Examples### Example 1: Reading Temperature and Pressure using Arduino and I2C
```c++
#include <Wire.h>
#include <BMP280.h>BMP280 bmp;void setup() {
Serial.begin(9600);
Wire.begin();
bmp.begin();
}void loop() {
if (bmp.measure()) {
float temperature = bmp.getTemperature();
float pressure = bmp.getPressure();
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.println(" C");
Serial.print("Pressure: ");
Serial.print(pressure);
Serial.println(" hPa");
delay(1000);
}
}
```
In this example, we use the BMP280 Arduino library to communicate with the sensor module via I2C. We read the temperature and pressure values using `getTemperature()` and `getPressure()` functions and print them to the serial monitor.### Example 2: Reading Temperature using Raspberry Pi and Python
```python
import smbus
import timebus = smbus.SMBus(1) # Use I2C bus 1
bmp_address = 0x76 # BMP280 addressdef read_temperature():
bus.write_byte(bmp_address, 0xF4) # Select temperature measurement
time.sleep(0.05) # Wait for measurement to complete
temp_msbl = bus.read_byte(bmp_address, 0x01)
temp_lsbl = bus.read_byte(bmp_address, 0x02)
temperature = (temp_msbl << 8 | temp_lsbl) / 16.0
return temperaturewhile True:
temperature = read_temperature()
print("Temperature: {:.2f} C".format(temperature))
time.sleep(1)
```
In this example, we use the `smbus` library to communicate with the BMP280 sensor module via I2C on a Raspberry Pi. We read the temperature value using a custom `read_temperature()` function, which sends a command to the sensor to start a temperature measurement, waits for the measurement to complete, and then reads the result.### Example 3: Reading Pressure using ESP32 and MicroPython
```python
import machine
import utimei2c = machine.I2C(scl=machine.Pin(22), sda=machine.Pin(21)) # Use I2C pins 22 and 21
bmp280 = machine.I2C_BMP280(i2c)while True:
pressure = bmp280.pressure
print("Pressure: {:.2f} hPa".format(pressure))
utime.sleep(1)
```
In this example, we use the `machine` module in MicroPython to communicate with the BMP280 sensor module via I2C on an ESP32 board. We create an `I2C_BMP280` object, which provides a simple interface to read the pressure value using the `pressure` property.Note: Make sure to install the required libraries and modules for each example, and adjust the I2C pins and addresses according to your specific setup.