I'm using your code for the SPS30 which is really cool but I have a problem.

[jbasemvd]

I'm hoping you can help me with an error running example.py. I get this error:

Serial number: CCC69E8DCEAD8B5F Status register: {'speed_status': 'ok', 'laser_status': 'ok', 'fan_status': 'ok'} Traceback (most recent call last): File "/home/pi/Source/SPS30/example.py", line 13, in print(f"Auto cleaning interval: {pm_sensor.read_auto_cleaning_interval()}s") File "/home/pi/Source/SPS30/sps30.py", line 167, in read_auto_cleaning_interval data = self.i2c.read(NBYTES_AUTO_CLEANING_INTERVAL) File "/home/pi/Source/SPS30/i2c/i2c.py", line 21, in read return list(self.fr.read(nbytes)) OSError: [Errno 121] Remote I/O error

If I remove/comment the line print(f"Auto cleaning interval: {pm_sensor.read_auto_cleaning_interval()}s")line I get readings as expected:

Do you have any thoughts on what might be happening?

Here is the code I'm using which is the example.py file included in the download:

import sys import json from time import sleep from sps30 import SPS30

if name == "main": pm_sensor = SPS30() print(f"Firmware version: {pm_sensor.firmware_version()}") print(f"Product type: {pm_sensor.product_type()}") print(f"Serial number: {pm_sensor.serial_number()}") print(f"Status register: {pm_sensor.read_status_register()}") #print(f"Auto cleaning interval: {pm_sensor.read_auto_cleaning_interval()}s") pm_sensor.start_measurement()

while True:
    try:
        print(json.dumps(pm_sensor.get_measurement(), indent=2))
        sleep(2)

    except KeyboardInterrupt:
        print("Stopping measurement...")
        pm_sensor.stop_measurement()
        sys.exit()

Thanks advance, Walt