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Description: This is the T5403 breakout board, a fully calibrated barometric pressure sensor with an I2C interface. The T5403 sensor measures the absolute pressure of the air around. This pressure varies with both the weather and altitude. Depending on how you interpret the data, you can monitor changes in the weather, measure altitude, or any other tasks that require an accurate pressure reading.

The T5403 sensor consists of a piezoresistive MEMS pressure sensor element and an ASIC (application specific integrated circuit) with integrated temperature sensor, analog to digital converter ADC, memory and digital circuitry. Each breakout requires a supply voltage of 1.7V to 3.6V with a low current consumption of 790µA max and each pin (GND, VCC, SCL/SCLK, SDA/MOSI, MISO, RST/&SS, SEL, and EOC) broken out.


  • Supply Voltage: 1.7-3.6V
  • Max Current Consumption: 790µA
  • Pressure Range: 300hPa - 1100hPa
  • I2C Interface
  • 16 bit ADC
  • Internal Oscilator


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Customer Comments

  • NOTE: SPI not supported. The datasheet T5400.pdf says: “I2C and SPI interface”, but the comment of the code in the Github (Design Files) says: “NOTE: SPI is currently unsupported in the hardware.” I would find it helpful if the product description page were annotated when you are aware that the datasheet is wrong.

    NOTE: Only one T5403 per I2C bus, since the slave address is fixed at 0x77.

  • I wrote a Python script for T5403 + RaspberryPi . I cloned it from the Arduino example on Github. Please take it from here

  • Does anybody know the difference between this T5403 and the BMP180? I know the BMP180 also measures temperature, but I’d like to know if there is so much difference between the energy each one of them uses and then conclude if this is worth it. Thanks & Regards!

    • Originally it was supposed to be a SPI enabled sensor. But as it stands the minor difference is this sensor reports in Pa directly as opposed to hPA like the BMP180. But that is just a difference in multiplying/dividing by 100. There is a size difference in the IC (T5403 is smaller) but that doesn’t help much when it’s attached to a breakout.

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