Design with Adafruit MPL3115A2 I2C Barometric Pressure, Altitude, Temperature Sensor in Cirkit DesignerThe Adafruit MPL3115A2 is a compact, high-precision sensor capable of measuring barometric pressure, altitude, and temperature. Utilizing I2C communication, it is ideal for a variety of applications including weather monitoring, altimeters, and navigation systems. Its small form factor and low power consumption make it suitable for portable devices and remote sensing applications.
This circuit uses an Arduino UNO R4 WiFi to interface with an Adafruit MPL115A2 I2C Barometric Pressure and Temperature Sensor. The Arduino reads pressure and temperature data from the sensor via I2C communication and outputs the readings to the serial monitor.
Open Project in Cirkit Designer
This circuit uses an Arduino UNO to read temperature, pressure, and humidity data from a BME/BMP280 sensor via I2C communication. The sensor is powered by the Arduino's 5V and GND pins, and the data is printed to the Serial Monitor.
Open Project in Cirkit Designer
This circuit is designed to collect environmental data using an ESP-8266 microcontroller connected to a BMP180 barometric pressure sensor, a GY-30 BH1750FVI digital light intensity sensor, and a DHT11 temperature and humidity sensor. The sensors are interfaced with the ESP-8266 via I2C (SCL and SDA lines) and digital IO pins, and they share a common power supply (3.3V) and ground. The circuit is likely intended for weather monitoring or home automation applications, with capabilities to measure temperature, humidity, barometric pressure, and light intensity.
Open Project in Cirkit Designer
This circuit connects an Adafruit BME680 sensor to an Arduino UNO for the purpose of measuring environmental data such as temperature, pressure, humidity, gas resistance, and altitude. The BME680 is interfaced with the Arduino over I2C, with power supplied from the Arduino's 5V pin. The embedded code on the Arduino reads the sensor data and outputs it to the serial monitor, allowing for real-time environmental monitoring.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VDD | Power supply (2.5V to 5.5V) |
| 2 | GND | Ground connection |
| 3 | SCL | I2C clock line |
| 4 | SDA | I2C data line |
| 5 | INT | Interrupt output (active low) |
#include <Wire.h>
#include <Adafruit_MPL3115A2.h>
// Create an MPL3115A2 instance
Adafruit_MPL3115A2 baro = Adafruit_MPL3115A2();
void setup() {
Serial.begin(9600);
if (!baro.begin()) {
Serial.println("Could not find a valid MPL3115A2 sensor, check wiring!");
while (1);
}
}
void loop() {
float pressure = baro.getPressure(); // Get pressure in Pascals
float altitude = baro.getAltitude(); // Get altitude in meters
float temperature = baro.getTemperature(); // Get temperature in degrees Celsius
// Print the readings
Serial.print("Pressure: ");
Serial.print(pressure);
Serial.println(" Pa");
Serial.print("Altitude: ");
Serial.print(altitude);
Serial.println(" m");
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.println(" C");
delay(500); // Wait for half a second before next reading
}
Q: Can the MPL3115A2 sensor be used with a 3.3V system? A: Yes, the sensor can operate at voltages as low as 2.5V, making it compatible with 3.3V systems.
Q: How can I calibrate the altitude readings? A: Altitude readings can be calibrated by providing a known sea-level pressure to the sensor or by setting a current known altitude.
Q: What is the default I2C address of the MPL3115A2? A: The default I2C address is 0x60 (96 in decimal).
Q: How do I use the interrupt pin? A: The INT pin can be configured to trigger an interrupt on certain conditions like data ready or threshold crossing. Refer to the sensor's datasheet for detailed configuration.
Q: Is it necessary to use the Adafruit library? A: While it is not strictly necessary, the Adafruit MPL3115A2 library simplifies the interface with the sensor and provides convenient functions for accessing sensor data.
For further assistance, consult the MPL3115A2 datasheet and the Adafruit MPL3115A2 library documentation.