BMP180 Pressure Sensor Module Documentation

Component Name

BMP180 Pressure Sensor Module

Overview

The BMP180 Pressure Sensor Module is a high-performance, low-power digital pressure sensor module designed for a wide range of applications, including weather stations, altitude measurement, and industrial control systems. This module is based on the Bosch Sensortec BMP180 pressure sensor, which provides accurate and reliable pressure measurements.

Functionality

The BMP180 Pressure Sensor Module is a compact, surface-mount device that measures atmospheric pressure and temperature. It converts the measured values into digital data, which can be easily read by a microcontroller or other digital systems. The module's primary function is to provide accurate pressure and temperature readings, making it an ideal choice for various IoT applications.

Key Features

High-Accuracy Pressure Measurement: The BMP180 sensor provides accurate pressure measurements with a resolution of 0.01 hPa and an absolute accuracy of 1 hPa.
Wide Pressure Range: The module can measure pressures between 300 and 1100 hPa, covering a wide range of atmospheric pressure conditions.
Temperature Measurement: The BMP180 sensor also measures temperature with an accuracy of 2C and a resolution of 0.1C.
Low Power Consumption: The module operates at a low voltage range of 1.8 to 3.6V, making it suitable for battery-powered devices.
IC Interface: The BMP180 Pressure Sensor Module communicates with the host system using the IC (Inter-Integrated Circuit) interface, which allows for easy integration with popular microcontrollers such as Arduino, Raspberry Pi, and ESP32.
Small Form Factor: The module is compact, measuring only 15mm x 15mm, making it ideal for space-constrained applications.
Robust Design: The BMP180 Pressure Sensor Module is designed to operate in harsh environments, with a temperature range of -40C to 85C.
High-Resolution Mode: The module can operate in high-resolution mode, providing pressure measurements with 0.01 hPa resolution.
Open-Drain Interrupt Pin: The module features an open-drain interrupt pin, which can be used to trigger interrupts in the host system when the pressure or temperature values exceed certain thresholds.

Technical Specifications

Pressure Measurement Range

300 to 1100 hPa

Pressure Resolution

0.01 hPa

Pressure Accuracy

1 hPa

Temperature Measurement Range

-40C to 85C

Temperature Resolution

0.1C

Temperature Accuracy

2C

Operating Voltage

1.8 to 3.6V

Current Consumption

5 A (typical), 20 A (max)

IC Clock Frequency

Up to 1 MHz

Operating Temperature Range

-40C to 85C

Storage Temperature Range

-50C to 125C

Applications

The BMP180 Pressure Sensor Module is suitable for a wide range of applications, including

Weather stations and weather forecasting systems

Altitude measurement and GPS navigation

Industrial control systems and automation

Medical devices and equipment

Environmental monitoring and IoT devices

Conclusion

The BMP180 Pressure Sensor Module is a high-performance, low-power digital pressure sensor module ideal for various IoT applications. Its high accuracy, wide pressure range, and low power consumption make it an excellent choice for applications requiring reliable pressure and temperature measurements.

Pin Configuration

BMP180 Pressure Sensor Module Pinout Explanation
The BMP180 Pressure Sensor Module is a popular component used to measure atmospheric pressure, temperature, and altitude. It features a compact design and is widely used in various Internet of Things (IoT) applications. The module has 6 pins, which are explained below:
Pinout Structure:
Here is the point-by-point explanation of each pin:
VCC (Pin 1):
+ Function: Power Supply
+ Description: This pin is used to provide a stable power supply voltage to the BMP180 module. Typically, a voltage range of 1.8V to 3.6V is recommended.
+ Connection: Connect VCC to a suitable power source, such as a 3.3V or 5V output from a microcontroller or a power supply module.
GND (Pin 2):
+ Function: Ground
+ Description: This pin is the ground reference point for the BMP180 module.
+ Connection: Connect GND to a common ground point in your circuit, ensuring a stable ground connection.
SCL (Pin 3):
+ Function: Serial Clock
+ Description: This pin is used for the I2C serial communication protocol's clock signal.
+ Connection: Connect SCL to the SCL pin of your microcontroller or other I2C devices.
SDA (Pin 4):
+ Function: Serial Data
+ Description: This pin is used for the I2C serial communication protocol's data signal.
+ Connection: Connect SDA to the SDA pin of your microcontroller or other I2C devices.
NC (Pin 5):
+ Function: Not Connected
+ Description: This pin is not connected to any internal component and is reserved for future use.
+ Connection: Leave this pin unconnected.
NC (Pin 6):
+ Function: Not Connected
+ Description: This pin is not connected to any internal component and is reserved for future use.
+ Connection: Leave this pin unconnected.
Important Notes:
Make sure to connect the VCC pin to a suitable power source, and the GND pin to a common ground point.
Use a level shifter if your microcontroller operates at a voltage higher than the BMP180's recommended range (1.8V to 3.6V).
The BMP180 module communicates via the I2C protocol, so ensure that your microcontroller is configured to use I2C and that the SCL and SDA pins are connected correctly.
The NC pins (Pin 5 and Pin 6) should be left unconnected to avoid any potential damage to the module.
By following these pinout explanations and connection guidelines, you can successfully integrate the BMP180 Pressure Sensor Module into your IoT project and start measuring atmospheric pressure, temperature, and altitude.

Code Examples

BMP180 Pressure Sensor Module Documentation

Overview

The BMP180 Pressure Sensor Module is a compact, high-precision barometric pressure sensor module based on the BMP180 chip from Bosch Sensortech. It measures atmospheric pressure with high accuracy and stability, making it suitable for various IoT applications, such as weather stations, altitude measurement, and navigation systems.

Pinout

The BMP180 Pressure Sensor Module has a standard 5-pin interface:

VCC: Power supply (3.3V or 5V)
 GND: Ground
 SCL: I2C clock signal
 SDA: I2C data signal
 ADDR: I2C address selection (optional)

Communication Protocol

The BMP180 Pressure Sensor Module communicates using the I2C (Inter-Integrated Circuit) protocol.

Code Examples

### Example 1: Reading Pressure Data using Arduino

This example demonstrates how to read pressure data from the BMP180 Pressure Sensor Module using an Arduino board.

```cpp
#include <Wire.h>

#define BMP180_ADDRESS 0x77  // I2C address of the BMP180 module

void setup() {
  Wire.begin();
  Serial.begin(9600);
}

void loop() {
  int pressure = getPressure();
  Serial.print("Pressure: ");
  Serial.print(pressure);
  Serial.println(" Pa");
  delay(1000);
}

int getPressure() {
  uint16_t raw_pressure;
  Wire.beginTransmission(BMP180_ADDRESS);
  Wire.write(0xA0);  // Read pressure command
  Wire.endTransmission();
  Wire.requestFrom(BMP180_ADDRESS, 2);
  raw_pressure = (Wire.read() << 8) | Wire.read();
  return raw_pressure / 256.0;
}
```

### Example 2: Using BMP180 with Raspberry Pi (Python)

This example demonstrates how to read pressure data from the BMP180 Pressure Sensor Module using a Raspberry Pi with Python.

```python
import smbus

bus = smbus.SMBus(1)  # I2C bus 1
bmp180_address = 0x77  # I2C address of the BMP180 module

def read_pressure():
  bus.write_byte(bmp180_address, 0xA0)  # Read pressure command
  data = bus.read_i2c_block_data(bmp180_address, 0xA0, 2)
  pressure = (data[0] << 8) | data[1]
  return pressure / 256.0

while True:
  pressure = read_pressure()
  print("Pressure: {:.2f} Pa".format(pressure))
  time.sleep(1)
```

Note: In both examples, the I2C address of the BMP180 module is assumed to be 0x77. If your module has a different address, modify the code accordingly.

These examples demonstrate the basic usage of the BMP180 Pressure Sensor Module. You can modify and extend this code to suit your specific IoT application requirements.