kopia lustrzana https://github.com/pimoroni/pimoroni-pico
6a3ba0d421
MicroPython has changed MP_REGISTER_MODULE to use only *two* args and now runs the preprocessing stage on files before running makemoduledefs.py. This change avoids the build exploding, since the new regex matches the last two args as a single argument and generates a malformed module defs include. The pattern here exploits the fact that 1.18 and below do not preprocess files, so *both* MP_REGISTER_MODULE lines are included in the source, but *only* the three arg version is matched by regex. In >1.18 the files will be processed and the three arg version removed before makemoduledefs.py processes it. |
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| .. | ||
| README.md | ||
| breakout_scd41.c | ||
| breakout_scd41.cpp | ||
| breakout_scd41.h | ||
| micropython.cmake | ||
README.md
SCD41 CO2 Sensor Driver
Getting Started
Construct a new PimoroniI2C instance for your specific board. Breakout Garden uses pins 4 & 5 and Pico Explorer uses pins 20 & 21.
Since SCD41 has a fixed I2C address and the Sensirion SCD4x library is used under the hood, it's wrapped up as a module for Python.
Import the breakout_scd41 and call init to set up I2C:
import time
import pimoroni_i2c
import breakout_scd41
i2c = pimoroni_i2c.PimoroniI2C(4, 5)
breakout_scd41.init(i2c)
Taking Measurements
Before taking a measurement you must start periodic measurement by calling start().
Poll on ready() and use measure() to read the result when it's True:
breakout_scd41.start()
while True:
if breakout_scd41.ready():
co2, temperature, humidity = breakout_scd41.measure()
print(co2, temperature, humidity)
time.sleep(1.0)
The measure() method will return a Tuple containing the CO2 reading, temperature in degrees C and humidity.