Description

⚙ Hardware Needed

• [ ] PyCubed mainboard
  • [ ] Adafruit BM280 breakout (used in the example code below)

📚 External Libraries Needed

(optional) pycubed.py

(optional) adafruit_bme280

📑 Code

Using only built-in libraries:

import board
import busio
import digitalio
from adafruit_bme280 import basic as adafruit_bme280

# Setup the SPI connection
cs = digitalio.DigitalInOut(board.xSDCS)
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)

# Setup the SPI device
bme280 = adafruit_bme280.Adafruit_BME280_SPI(spi, cs)

print("\\nTemperature: %0.1f C" % bme280.temperature)
print("Humidity: %0.1f %%" % bme280.humidity)
print("Pressure: %0.1f hPa" % bme280.pressure)

Using the pycubed.py helper library and an external sensor breakout board:

from pycubed import cubesat
from adafruit_bme280 import basic as adafruit_bme280

# Setup the SPI device
bme280 = adafruit_bme280.Adafruit_BME280_SPI(cubesat.spi, cs)

print("\\nTemperature: %0.1f C" % bme280.temperature)
print("Humidity: %0.1f %%" % bme280.humidity)
print("Pressure: %0.1f hPa" % bme280.pressure)

Details

SPI is a three-wire communication protocol. Read more here and here

• PyCubed has lots of pins that can be configured for SPI. The default are shown to the right.

• default pin names are:

  board.MOSI
  board.SCK
  board.MISO
  

to learn more about configuring pins for different hardware functions, see: Pin Muxing

📖CircuitPython SPI documentation

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