Adafruit_PM25AQI (Air Particulate Sensor) Library killing me

[irwige]

@ScruffR

@irwige

Wire.begin();

For better practice you should use aqi.begin() instead.
Although this isn’t the case with this library but there may be other things that need to be done before you can properly use a library - hence you should always see whether used libraries feature a begin() , init() or similar method for that and call it in setup() .

When you refer to using aqi.begin() in place of Wire.begin(), are you just referring to the instance where I call it in the .ino or also the Wire.begin() within the .cpp of the library that gets called when i do the aqi.begin()?

I am now trying to add a second sensor to the same i2c and it is not playing nice. If i re-flash with just a library from the second sensor, it works, fine... If i copy/paste it all over (and update libraries) it doesnt.... I presume it's because the Wire.begin() is hogging it to the dust sensor?

Will play with the Wire.begin() mentions and see how I go.

Edit: specifically, i'm referring to this in the .spp:

bool Adafruit_PM25AQI::begin()
{
  Wire.begin();  /// this gets called when i do api.begin(). I presume thats the right time to use Wire?
  return true;
}