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ENG-CANSAT-PICO-MISSION1-CAPTURE (voir la source)
Version du 6 mars 2022 à 18:06
, 6 mars 2022 à 18:06→The code explained
First, the script will includes all the needed libraries.
First, the script will includes all the needed libraries.
<syntaxhighlight lang="python">
<syntaxhighlight lang="python">from machine import SPI, I2C, Pin, ADC
from machine import SPI, I2C, Pin, ADC
from rfm69 import RFM69
from rfm69 import RFM69
from bme280 import BME280, BMP280_I2CADDR
from bme280 import BME280, BMP280_I2CADDR
This section is immediately followed by the various CONSTANT used in the script.
This section is immediately followed by the various CONSTANT used in the script.
<syntaxhighlight lang="python">
<syntaxhighlight lang="python">FREQ = 433.1
FREQ = 433.1
ENCRYPTION_KEY = b"\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08"
ENCRYPTION_KEY = b"\x01\x02\x03\x04\x05\x06\x07\x08\x01\x02\x03\x04\x05\x06\x07\x08"
NODE_ID = 120 # ID of this node
NODE_ID = 120 # ID of this node
Then we create the needed buses resources to access the various sensor.
Then we create the needed buses resources to access the various sensor.
<syntaxhighlight lang="python">
<syntaxhighlight lang="python">spi = SPI(0, baudrate=50000, polarity=0, phase=0, firstbit=SPI.MSB)
spi = SPI(0, baudrate=50000, polarity=0, phase=0, firstbit=SPI.MSB)
nss = Pin( 5, Pin.OUT, value=True )
nss = Pin( 5, Pin.OUT, value=True )
rst = Pin( 3, Pin.OUT, value=False )
rst = Pin( 3, Pin.OUT, value=False )
Next we create the RFM69 radio object (named {{fname|rfm}}) and the BMP280 radio object (named {{fname|bmp}}).
Next we create the RFM69 radio object (named {{fname|rfm}}) and the BMP280 radio object (named {{fname|bmp}}).
<syntaxhighlight lang="python">
<syntaxhighlight lang="python"># RFM Module
# RFM Module
rfm = RFM69( spi=spi, nss=nss, reset=rst )
rfm = RFM69( spi=spi, nss=nss, reset=rst )
rfm.frequency_mhz = FREQ
rfm.frequency_mhz = FREQ
At the end of initialization section, we do creates the instances for the analog reading (the TMP36, named {{fname|adc}}) and LED controling (named {{fname|led}}).
At the end of initialization section, we do creates the instances for the analog reading (the TMP36, named {{fname|adc}}) and LED controling (named {{fname|led}}).
<syntaxhighlight lang="python">
<syntaxhighlight lang="python"> # TMP36 analog pin
# TMP36 analog pin
adc = ADC(Pin(26))
adc = ADC(Pin(26))
# Onboard LED
# Onboard LED
Just before the main loop, the script print the essential data.
Just before the main loop, the script print the essential data.
<syntaxhighlight lang="python">
<syntaxhighlight lang="python"># Main Loop
# Main Loop
print( 'Frequency :', rfm.frequency_mhz )
print( 'Frequency :', rfm.frequency_mhz )
print( 'encryption :', rfm.encryption_key )
print( 'encryption :', rfm.encryption_key )
</syntaxhighlight>
</syntaxhighlight>
=== Main Loop execution ===
The main loop is composed of an infinite {{fname|while}} loop.
The main loop is composed of an infinite {{fname|while}} loop.
<syntaxhighlight lang="python">
<syntaxhighlight lang="python"># Iteration counter
# Iteration counter
counter = 1
counter = 1
# ctime contains the time (in seconds) when the script was stared
# ctime contains the time (in seconds) when the script was stared