PMS5003 timing out

Hello. I set up my pi3+ and I am able to read data from all of the sensors except for the PMS5003. Every time I try to run the ‘particulate.py’ I get the following error:

Traceback (most recent call last):
File “particulates.py”, line 24, in
readings = pms5003.read()
File “/usr/local/lib/python2.7/dist-packages/pms5003-0.0.5-py2.7.egg/pms5003/init.py”, line 127, in read
raise SerialTimeoutError(“PMS5003 Read Timeout: Failed to read start of frame byte”)
pms5003.SerialTimeoutError: PMS5003 Read Timeout: Failed to read start of frame byte

I am running the latest version of raspberrypi OS and all packages are up to date.

Thank you

This sounds like the Pi isn’t getting any data from the sensor. How do you have it wired up?