Synchronise with new features in pimoroni/pms5003-circuitpython

[kevinjwalters]

This library is very similar to pimoroni/pms5003-circuitpython and a lot of improvements were added to that in

• Increased care with serial reads, retries and new passive mode for requesting data pms5003-circuitpython#8
  • Frequent "PMS5003 Checksum Mismatch" pms5003-circuitpython#3
  • Various errors from not reading streaming data promptly pms5003-circuitpython#4
  • Add request based reads for polling (AKA passive mode) pms5003-circuitpython#5
  • Add automatic retries for CheckSumMismatch and similar pms5003-circuitpython#6

With some luck (and testing) the pms5003-python may be able to be generated from pms5003-circuitpython code with a minor patch. The versions could synchronise at 0.0.6 as a partial indication of their linkage.

[Gadgetoid]

Agreed. I just ported these to a new MicroPython library and they seem to work well!

I think it might be possible to abstract away the UART and GPIO access somewhat so that they can share a common codebase with just those portions changed. There seem to be some platform-specific quirks regarding UART reads being blocking vs non-blocking and differing buffer sizes but hopefully nothing we can't smooth over.