def read(self, SIO):
i2c = busio.I2C(board.SCL, board.SDA,
frequency=100000) # freq slower for pm25
sensor = AS726x_I2C(i2c)
sensor.integration_time = self.T_integ
sensor.gain = 64 # 1., 3.7, 16., 64.]
sensor.start_measurement()
self.t = time.time()
time.sleep(2 * self.T_integ / 1000.)
while not sensor.data_ready:
time.sleep(0.05)
# "typical" 45 counts / uW/cm^2 at gain 16, 166 ms integration
n = 16 * 166 / (45. * self.T_integ * sensor.gain) # normalization
r, o, y, g, b, v = sensor.red * n, sensor.orange * n, sensor.yellow * n, sensor.green * n, sensor.blue * n, sensor.violet * n
self.spectrum = (r, o, y, g, b, v)
self.T = sensor.temperature
self.raw = (sensor.raw_red, sensor.raw_orange, sensor.raw_yellow,
sensor.raw_green, sensor.raw_blue, sensor.raw_violet)
print("\nAS726x spectrum (uW/cm^2) over", self.T_integ, "ms, at",
self.T, "deg. C:")
print(" * R", r, self.raw[0])
print(" * O", o, self.raw[1])
print(" * Y", y, self.raw[2])
print(" * G", g, self.raw[3])
print(" * B", b, self.raw[4])
print(" * V", v, self.raw[5])
SIO.log_readout(self.R_id, r, self.t)
SIO.log_readout(self.O_id, o, self.t)
SIO.log_readout(self.Y_id, y, self.t)
SIO.log_readout(self.G_id, g, self.t)
SIO.log_readout(self.B_id, b, self.t)
SIO.log_readout(self.V_id, v, self.t)
SIO.log_readout(self.T_id, self.T, self.t)
# adjust for next readout
rmax = max(self.raw)
if rmax: self.T_integ = min(max((2**15) * self.T_integ / rmax, 3), 700)
else: self.T_integ = 700
import typer
from adafruit_as726x import AS726x_I2C
import adafruit_tca9548a
import board
import busio
# Initialize I2C bus
i2c = busio.I2C(board.SCL, board.SDA)
# mux
tca2 = adafruit_tca9548a.TCA9548A(i2c, address=0x72)
# spectral triad
ls = AS726x_I2C(tca2[6])
ls.conversion_mode = ls.MODE_2
# maximum value for ls reading
max_val = 16000
# max number of characters in each graph
max_graph = 80
def graph_map(x):
return min(int(x * max_graph / max_val), max_graph)
def main(num: int = 100):
for i in range(num):
# from adafruit_as726x import AS726x_UART
# maximum value for sensor reading
max_val = 16000
# max number of characters in each graph
max_graph = 80
def graph_map(x):
return min(int(x * max_graph / max_val), max_graph)
# for I2C use:
i2c = busio.I2C(board.SCL, board.SDA)
sensor = AS726x_I2C(i2c)
# for UART use:
# uart = busio.UART(board.TX, board.RX)
# sensor = AS726x_UART(uart)
sensor.conversion_mode = sensor.MODE_2
while True:
# Wait for data to be ready
while not sensor.data_ready:
time.sleep(0.1)
# plot plot the data
print("\n")
print("V: " + graph_map(sensor.violet) * "=")