simple code to poll two SDS011 sensors connected via CH340G USB adapters

Dual_SDS011_test.py

from sds011 import SDS011
from datetime import datetime
import time

#CH340G adapters seem to give port names
#based on which port you plug them into:
s1 = SDS011("/dev/tty.wchusbserial1410") #Left USB Port
s2 = SDS011("/dev/tty.wchusbserial1420") #Right USB Port

def read_sensor():
    #turn on sensors
    s1.sleep(sleep=False)
    s2.sleep(sleep=False)
    #15 seconds for sensor to get ready
    time.sleep(15)
    
    now = datetime.now()
    current_time = now.strftime("%H:%M:%S")
    d1 = s1.query()
    d2 = s2.query()
    print (current_time+ " # S1: " + str(d1[0]) + " " +  str(d1[1]) + " S2: " + str(d2[0]) + " " +  str(d2[1]))
    
    #turn them off again
    s1.sleep()
    s2.sleep()

now = datetime.now()
current_time = now.strftime("%H:%M:%S")
print("Test Start = ", current_time)
while True:
    read_sensor()
    time.sleep(45)