Problems with getting data from pressure sensor

[alaynahassan]

Hi! So I am facing a problem w getting data from a pressure sensor. Everything works except that when the data comes up, I only nan on every aspect.

I am not quite sure where the problem lies and would love to get some help on that (:

Here is the wiring:

Here is the code:

#include "Adafruit_BMP280.h"

 
Adafruit_BMP280 bmp;
 
void setup() {
    bmp.begin();
 
    Serial.begin(9600);
    Serial.println("Start of measurements");
}
 
void loop() {
    float t = bmp.readTemperature();
    float p = bmp.readPressure();
    float h = bmp.readAltitude(1012.3);
 
    Serial.print("Temperature = "); 
    Serial.print(t); 
    Serial.print(" *C"); 
 
    Serial.print("Pressure = "); 
    Serial.print(p); 
    Serial.print(" Pa"); 
 
    Serial.print("Altitude = "); 
    Serial.print(h); 
    Serial.print(" m"); 
 
    Serial.println();
    delay(2000);
}

[ruilviana]

Use this Adafruit BMP280 Library example and say what happened.

adafruit/Adafruit_BMP280_Library/blob/master/examples/bmp280_sensortest/bmp280_sensortest.ino

[alaynahassan]

Hi, thanks for your reply! I have tried the code which you sent but I still can't seem to get any data. when using the code you suggested, the program has an error and says to check the wiring, although I think the wiring is correct...

[gilshultz]

@alaynahassan

Adafruit_BMP280

You may have a bad pull up resistor on the board. Try adding a pull-up to SDA and SCK. Run the I2C scanner before and again after adding the resistors and let us know what you get.

[alaynahassan]

Hi! Thanks for your reply! Unfortunately, it still did not work and I still keep getting nan for all my values...

[JohnLincoln]

You need to solder those header pins on the BMP280 breakout board.

You can't expect to get a proper connection with the pins just pushed in the holes of the PCB.