Arduino and the BMP280 Pressure Temperature Module

Next up in my Arduino research is the BMP280 pressure/temperature module. This is a device manufactured by Bosch, and is ideally suited to high altitude balloon atmospheric measurements.

The bmp280 datasheet has many details about the device.  Each module based on this device will have its own quirks, but they seem to generally follow the datasheet for functionality.

Major differences noted between modules are the inclusion or lack of level conversion, ie 5v to 3.3v.  Since the device runs on 3.3v, if you want to use it with most Arduinos at 5v, you will need to check that the module includes a 3.3v regulator and level conversion scheme.

If there is no voltage conversion on the module, you should only use it with 3.3v based Arduinos, such as the Due.

The Adafruit module that I selected does include the necessary voltage conversion circuitry.  So it may be run on either 5v or 3.3v Arduinos without fear of killing anything.

Adafruit BMP280 Module

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Freeduino RBBB and the SD Card Reader

The next board to be tested with the SD Card Readers is the Modern Devices RBBB (Really Bare Bones Board).

This appears to be similar to the Arduino Duemilanove that we tested in a previous post, in that it uses the ATmega168 chip.  However, the RBBB does not have a built-in USB interface, nor a LED installed on pin 13. It is a small form factor, like the Arduino Nano, with pins spaced to be placed on a breadboard.

I didn’t have much hope for using this board with the SD Card Readers, as the Duemilanove failed due to memory constraints.

I started off with an inventory of the parts.  Everything that was promised was accounted for.

RBBB Parts

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Arduino Due and the SD Card Reader

The next board to test with the SD Card Readers is the Arduino Due.

Arduino Due

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Arduino Mega 2560 and the SD Card Reader

The next board to test with the SD Card Readers is the Arduino MEGA 2560.  This is a more complex microprocessor, with 54 digital I/O pins, 16 analog inputs and a larger space for your sketch.

Arduino Mega2560

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Arduino Duemilanove and the SD Card Reader

The second Arduino board that I tried to get the SD Card Readers to work on was the Duemilanove, an old, cheap, small board that was my introduction to Arduino back around 2010 or so.

Arduino Duemilanove

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