Inaki Iturriaga
ARGENTINA • + Follow
Components
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Arduino_UNO_R3 |
x 1 | |
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16x2 Display |
x 1 | |
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16x2 Display to I2C Converter. |
x 1 | |
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BMP280 |
x 1 | |
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SPI SD Card Reader |
x 1 |
Tools, APP Software Used etc.
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arduino IDEArduino
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SD Card |
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Soldering Iron Kit |
Description
Altimeter Datalogger with Display.
Building Tutorial
Altimeter Datalogger with Display.
Components needed:
- BMP280 sensor
- I2C to 16x2 display converter
- Pre-made PCB board
- Arduino UNO
- Jumper wires
- Soldering iron and solder
- SD Card Reader.
Step 1: Preparing and Soldering the PCB board
- Place the BMP280 and I2C to 16x2 display converter on the designated areas on the pre-made PCB board.
- Heat up the soldering iron to the recommended temperature.
- Apply a small amount of solder to the tip of the soldering iron to ensure a good connection.
- Starting with the BMP280 sensor, apply heat to one of the pins and add solder until it melts and adheres to the pad on the pre-made PCB board.
- Continue soldering the remaining pins of the BMP280 sensor, making sure to keep the sensor flat and aligned with the pads on the pre-made PCB board.
- Repeat the same process for the I2C to 16x2 display converter and the SD Card Reader, making sure to align the pins with the pads on the pre-made PCB board.
Step 3: Coding the project using Arduino IDE
- Connect the Arduino UNO to your computer using a USB cable.
- Open the Arduino IDE on your computer and create a new sketch.
- Copy and paste the code given on the project page into the Arduino IDE.
- Compile the code and upload it to the Arduino UNO.
- Once uploaded, open the Serial Monitor to see the altitude readings from the BMP280 sensor and the display will show the altitude reading as well.
That's it! You have successfully soldered the BMP280 sensor and I2C to 16x2 display converter to a pre-made PCB for an Arduino UNO and coded it using the Arduino IDE.
Code
Code
Arduino
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>
#include <LiquidCrystal_I2C.h>
#include <SD.h>
#define LCD_COLUMNS 16
#define LCD_ROWS 2
#define LOG_FILE_NAME "altitude.log"
#define LOG_INTERVAL 300 // Log interval in milliseconds
Adafruit_BMP280 bmp; // Create BMP280 object
LiquidCrystal_I2C lcd(0x27, LCD_COLUMNS, LCD_ROWS); // Initialize LCD
File logFile; // Create log file object
float maxAltitude = 0.0; // Initialize maximum altitude variable
void setup() {
Serial.begin(9600); // Start serial communication
lcd.init(); // Initialize LCD
lcd.backlight(); // Turn on LCD backlight
if (!bmp.begin(0x76)) { // Initialize BMP280 with I2C address 0x76
Serial.println("Could not find a valid BMP280 sensor, check wiring!");
while (1);
}
if (!SD.begin(10)) { // Initialize microSD card with pin 10
Serial.println("Could not initialize SD card, check wiring!");
}
logFile = SD.open(LOG_FILE_NAME, FILE_WRITE); // Open log file for writing
logFile.println("Time,Altitude"); // Write header to log file
logFile.close();
}
void loop() {
static unsigned long lastLogTime = 0; // Initialize last log time variable
unsigned long currentTime = millis(); // Get current time in milliseconds
float temperature = bmp.readTemperature(); // Read temperature in Celsius
float pressure = bmp.readPressure() / 100.0; // Read pressure in hPa
float altitude = bmp.readAltitude(1012.7); // Read altitude in meters relative to sea level
// Update maximum altitude
if (altitude > maxAltitude) {
maxAltitude = altitude;
}
// Print readings to serial monitor
Serial.print("Temperature = ");
Serial.print(temperature);
Serial.println(" °C");
Serial.print("Pressure = ");
Serial.print(pressure);
Serial.println(" hPa");
Serial.print("Altitude = ");
Serial.print(altitude);
Serial.println(" meters");
// Update LCD display
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Max Altitude:");
lcd.setCursor(0, 1);
lcd.print(maxAltitude);
lcd.print(" meters");
// Log altitude every 0.3 seconds
if (currentTime - lastLogTime >= LOG_INTERVAL) {
logFile = SD.open(LOG_FILE_NAME, FILE_WRITE); // Open log file for writing
logFile.print(currentTime / 1000.0); // Write time in seconds
logFile.print(",");
logFile.println(altitude); // Write altitude
logFile.close();
lastLogTime = currentTime; // Update last log time
}
delay(100); // Wait for 0.1 second before reading again
}
CAD-Custom parts and enclosures
Case_Bottom
Flight_Computer1.stl
Case_Top
Flight_Computer2.stl
Mar 24,2023
1,342 views
Altimeter Datalogger with Display.
Make a Datalogging Altimeter with a Display!
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Published: Mar 24,2023
Standard PCB
Download Gerber file 5
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