Digital Barometer/Altimeter (Troyka Module)

  • AMP-B034
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Every ice fishing enthusiest knows about the effects of high atmospheric pressure on bait and fish. This barometer from the Troyka Module series will help you measure atmospheric pressure, or your altitude above sea level. With our barometer, you can easily decide whether today is the day you bring out the fishing rod, without even stepping outside.

We based this module on the LPS331AP chip from STMicroelectronics.

The chip has a built-in temperature sensor. This will help to achieve accurate sensor readings even under extreme conditions. Communication of the module with control electronics, such as an Arduino(cat://arduino), occurs via the I²C interface. This means that you only need two contacts to connect the module to the board.

We put a voltage regulator and a special I²C buffer on the module. Therefore, you can safely use it with voltages from 3.3 V to 5 V.


The connection of this modules differs from the standard - it has two three-pin connectors. One connector is used to apply voltage, while the other is for connecting to the I²C bus. Two 3-pin jumper cables needed for the connections are included in the kit.

There are several different ways to wire this module:

Troyka Shield. The most straightforward method. Connect the module to a pin group on Troyka Shield with the 3-pin jumper cable and you’re ready to interface with it from your Arduino.

Troyka Slot Shield. The best choice for quick prototyping. Using slots on the shield, you can get rid of cables. The module will be held securely in place using both pin headers.

Breadboard. For advanced use. Troyka pin headers have 0.1” spacing which is compatible with any breadboard. Simply wire the module like you would do with any IC.Two 3-wire loop cables are included.


  • Sensitivity: 2.4 × 10-4 mbar
  • Measuring Range: 1260 mbar
  • Supply Voltage: 3.3-5 V
  • Current Draw: less than 10 mA
  • Dimensions: 25.4 × 25.4 mm