BME280 with Arduino Mega 2560

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MichaelProino
 
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Re: BME280 with Arduino Mega 2560

Post by MichaelProino »

Thank you for your feedbacks! Then, we must not cover the sensor with anything, this is so healthy I guess.
I have another question, if this sensor faces directly water, I mean under rain, does it damage or operates correctly?

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adafruit_support_bill
 
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Re: BME280 with Arduino Mega 2560

Post by adafruit_support_bill »

Water inside the sensor could affect readings and ultimately damage the sensor. Typical protection for barometric sensors in outdoor locations is to put them in a water resistant enclosure with vent holes in the bottom. The enclosure protects the electronics from direct exposure to falling or blowing rain, but the vents allow equalization of pressure. A conformal coating as mentioned above provides additional protection from condensation.

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MichaelProino
 
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Re: BME280 with Arduino Mega 2560

Post by MichaelProino »

Thank you for your kind replies! My sensor board works correctly and I understand how to use it outside, I really appreciate to you :)

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jboyton
 
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Re: BME280 with Arduino Mega 2560

Post by jboyton »

You need to take care to prevent bright light (e.g. sunlight) from entering the vent hole as well. It won't damage the sensor but it will affect the pressure reading.

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MichaelProino
 
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Re: BME280 with Arduino Mega 2560

Post by MichaelProino »

I have another question, what is the maksimum current value of this shuttle board, I mean during measurement, also what is the time range of the measurement?

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adafruit_support_bill
 
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Re: BME280 with Arduino Mega 2560

Post by adafruit_support_bill »

The datasheet has this information for the sensor chip. Current consumption is just a few uA as shown on page 2.
Sample timing in various operating modes is described on page 51.

In addition to the chip's current ratings, you need to add a few uA for the quiescent current of the on-board regulator and the current through the pullup resistors on the i2c bus during active communication.

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jboyton
 
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Re: BME280 with Arduino Mega 2560

Post by jboyton »

The average current drawn by the BME280 module varies a great deal depending on configuration. There are four examples given in the datasheet on pages 17 & 18 ranging from 0.16uA (weather monitoring) to 633uA (indoor navigation). In general you need to calculate it based on the information in the datasheet.

Instantaneous current has a maximum of 714uA during a pressure measurement.

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