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main.py
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import time
from scd4x_sensirion import SCD4xSensirion
from machine import I2C, Pin
from sensor_pack_2.bus_service import I2cAdapter
if __name__ == '__main__':
# пожалуйста установите выводы scl и sda в конструкторе для вашей платы, иначе ничего не заработает!
# please set scl and sda pins for your board, otherwise nothing will work!
# https://docs.micropython.org/en/latest/library/machine.I2C.html#machine-i2c
# i2c = I2C(0, scl=Pin(13), sda=Pin(12), freq=400_000) # для примера
# bus = I2C(scl=Pin(4), sda=Pin(5), freq=100000) # на esp8266 !
i2c = I2C(id=1, scl=Pin(7), sda=Pin(6), freq=400_000)
adaptor = I2cAdapter(i2c)
# sensor
sen = SCD4xSensirion(adaptor)
# Force return sensor in IDLE mode!
# Принудительно перевожу датчик в режим IDLE!
sen.start_measurement(start=False, single_shot=False)
sid = sen.get_id()
print(f"Sensor id: {sid}")
# t_offs = 0.0
# Warning: To change or read sensor settings, the SCD4x must be in idle mode!!!
# Otherwise an EIO exception will be raised!
# print(f"Set temperature offset sensor to {t_offs} Celsius")
# sen.set_temperature_offset(t_offs)
t_offs = sen.get_temperature_offset()
print(f"Get temperature offset from sensor: {t_offs} Celsius")
masl = 160 # Meter Above Sea Level
print(f"Set my place M.A.S.L. to {masl} meter")
sen.set_altitude(masl)
masl = sen.get_altitude()
print(f"Get M.A.S.L. from sensor: {masl} meter")
# data ready
if sen.get_data_status():
print("Measurement data can be read!") # Данные измерений могут быть прочитаны!
else:
print("Measurement data missing!")
# отключаю автоматическую калибровку! Для искусственных помещений (indoor) она должна быть отключена!
sen.set_auto_calibration(value=False)
if sen.is_auto_calibration():
print("The automatic self-calibration is ON!")
else:
print("The automatic self-calibration is OFF!")
sen.start_measurement(start=True, single_shot=False) # periodic start
wt = sen.get_conversion_cycle_time()
print(f"conversion cycle time [ms]: {wt}")
print("Periodic measurement started")
repeat = 50
multiplier = 2
for i in range(repeat):
time.sleep_ms(wt)
_meas_data = sen.get_measurement_value()
print(f"{_meas_data}")
print(20 * "_")
if sen.is_single_shot_mode():
print("Single shot mode!")
if sen.is_continuously_mode():
print("Continuously mode!")
print(20 * "_")
print("Reading using an iterator!")
for counter, _meas_data in enumerate(sen):
time.sleep_ms(wt)
if not _meas_data is None:
print(f"CO2 [ppm]: {_meas_data.CO2}; T [°C]: {_meas_data.T}; RH [%]: {_meas_data.RH}")
else:
print("Measurement data missing!")
if repeat == counter:
break
print(20 * "*_")
print("Using single shot mode!")
# Force return sensor in IDLE mode!
# Принудительно перевожу датчик в режим IDLE!
sen.start_measurement(start=False, single_shot=False)
cnt = 0
while True:
sen.start_measurement(start=False, single_shot=True, rht_only=False)
time.sleep_ms(multiplier * wt) # 3x period
_meas_data = sen.get_measurement_value()
print(f"CO2 [ppm]: {_meas_data.CO2}; T [°C]: {_meas_data.T}; RH [%]: {_meas_data.RH}")
cnt += 1
if cnt > repeat:
break
# Принудительно перевожу датчик в режим IDLE!
# sen.set_measurement(start=False, single_shot=False)
sen.start_measurement(start=False, single_shot=True, rht_only=True) # rht only mode!
wt = sen.get_conversion_cycle_time()
print(20 * "*_")
# Использование режима измерения по запросу! Только относительная влажность и температура измеряются датчиком!
# относительная влажность + температура. CO2 равна нулю или не изменяется!!!
print("Using single shot mode! RH + T only! (Temp + RH. CO2 always zero or does not change!!)")
while True:
time.sleep_ms(multiplier * wt) # 3x period
_meas_data = sen.get_measurement_value()
print(f"CO2 [ppm]: {_meas_data.CO2}; T [°C]: {_meas_data.T}; RH [%]: {_meas_data.RH}")
sen.start_measurement(start=False, single_shot=True, rht_only=True) # rht only mode!