Difference between revisions of "Raspberry Pi: Sense Hat"
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==== Using the barometer ==== | ==== Using the barometer ==== | ||
The barometer delivers two functions the get_pressure() and the get_temperature_from_pressure().Both of them return a float value of the corresponding unit. | The barometer delivers two functions the <code>get_pressure()</code> and the <code>get_temperature_from_pressure()</code>.Both of them return a float value of the corresponding unit. | ||
pressure = sense.get_pressure() | pressure = sense.get_pressure() | ||
Revision as of 07:41, 12 October 2020
Summary
This documentation deals with the Raspberry Sense Hat.
Requirements
- Hardware: Raspberry Pi
- Operating system: Rasbian
- Interpreter: Python or Python3
- Packages: sense-hat
Description
This add-on board has a is packed with three sensor chips as wall as a 8 by 8 RGB Led matrix and a joystick. The Sensors are a barometer, a hygrometer and an IMU (Inertial Measurement Unit). The barometer measures the air pressure and the temperature. The hygrometer measures the humidity and the temperature as well. The used IMU holds a gyroscope, an accelerometer and a magnetometer for an accurate determination of rotation, movement and detection of magnetic fields.
Package Installation
sudo apt-get install sense-hat
Python Programming
The Sense Hat is mainly used via python programming. The developers also developed a sense hat programming simulation program on trinket.io where you are able to test your code without owning the Sense Hat.
The Project comes with two main libraries the sense_emu which is needed when using the Emulator and the sense_hat for the device. For detailed information about the library use the documentation.
Importing the Libary
# emulator libary from sense_emu import SenseHat sense = SenseHat()
# sensehat libary from sense_hat import SenseHat sense = SenseHat()
Using the barometer
The barometer delivers two functions the get_pressure() and the get_temperature_from_pressure().Both of them return a float value of the corresponding unit.
pressure = sense.get_pressure()
print("Pressure: %s Millibars" % pressure)
temp = sense.get_temperature_from_pressure()
print("Temperature from pressure sensor: %s C" % temp)
Using the hygrometer
The hygrometer delivers also two functions the get_humidity() and the get_temperature_from_humidity(), Both of them return a float value of the corresponding unit.
humidity = sense.get_humidity()
print("Humidity: %s %%" % humidity)
temp = sense.get_temperature_from_humidity()
print("Temperature from pressure humidity: %s C" % temp)