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→Step 3: going asynchronous
* RUN_APP switch placed on STOP position
* RUN_APP switch placed on STOP position
=== Step 4: setup parameter ===
The ''setup'' parameter when calling the {{fname|setup()}} method can be used to configure additional hardware (or sensors).
The example here below use a setup() routine that creates a [https://shop.mchobby.be/fr/cartes-breakout/1118-bmp280-senseur-de-pression-barometrique-temperature-altitude-33-et-5v-3232100011182-adafruit.html BMP280 athmospheric pressure sensor] then attach it to the {{fname|din}} instance as {{fname|sensor}} attribute.
Then, the {{fname|loop()}} routine can access the {{fname|sensor}} attribute to query the data.
<syntaxhighlight lang="python">
from mydin import configure
from mydin.pico import Pico3Mod
from mydin.backplane.relays import TwoRelay3Mod
from bme280 import *
din = configure( Pico3Mod, TwoRelay3Mod )
def setup( din ):
# Add a new attribute to "din" instance
din.sensor = BME280( i2c=din.i2c, address=BMP280_I2CADDR )
async def loop( din ):
# accessing sensor
temp, hpa, rh = din.sensor.raw_values
# ... user code here ...
din.setup( setup=setup, loop=loop )
din.run()
</syntaxhighlight>
{{tmbox | text = The experienced user would notice the {{fname|din.i2c}} as }}
{{MyDin-TRAILER}}
{{MyDin-TRAILER}}