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Use this tag for questions about selecting, connecting, using, and debugging sensors.

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Sea level pressure for BMP280

It seems this was planned for the Adafruit BMP280 library but not implemented. Looking at Adafruit_BMP280.h we see commented code that has a method seaLevelForAltitude(): /* class Adafruit_BMP280_Unif …
Thomas Weller's user avatar
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2 answers
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Sea level pressure for BMP280

I have a BMP280 and BMP180 pressure sensor and I have both of them connected via I²C to a ESP8266. For the BMP180, I can get the sea level air pressure when I pass the pressure and altitude like so: / …
Thomas Weller's user avatar
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Trying to measure distance using an ultrasound sensor

You have declared int distance outside of any method. That means it's available from all methods. Some people call it a global variable. However, you have a method int distancefonction(int dt, int di …
Thomas Weller's user avatar
2 votes

How real-time is an arduino (react to sensor)?

TLDR: any Arduino is probably sufficient for your purpose when done properly. I'll assume a proper HIGH/LOW binary signal from the sensor, HIGH when it "sees" the marker, LOW when it doesn't. What cou …
Thomas Weller's user avatar
2 votes
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How can I downsize protruding pins from sensors to so I can use a smaller housing?

Buy the sensor without pins and solder the wires directly to the board. You should do that anyway for a better mechanical and electrical connection. The same applies to the Arduino or other micro-cont …
Thomas Weller's user avatar