Carter Nelson

Does the library example work as expected? https://github.com/adafruit/RTClib/blob/master/examples/pcf8523/pcf8523.ino

What RTC module is being used? What Arduino sketch is being run? The validity of the I2C connection is checked in `begin()` which returns false if it fails. If `begin()`...

I think the 2.1.2 release is essentially non-existent due to an issue with not updating `library.properties` correctly. So 2.1.3 is 2.1.2. In the screenshot above, 2.1.3 is not in the...

FWIW, based on the name, this one was probably installed manually, via downloading repo zip: ``` - C:\Users\per\Documents\Arduino\libraries\RTClib-master ```

Recreated issue using library example: https://github.com/adafruit/Adafruit_TSL2591_Library/blob/master/examples/tsl2591/tsl2591.ino and setting gain and integration time to lowest settings. In dim light with finger over sensor: 

Just to point out, the lux calculation for this sensor is a point of on going discussion: https://github.com/adafruit/Adafruit_TSL2591_Library/issues/14 with the current assessment that it should be taken as a nominal...

It also looks like #42 is an attempt to fix this same behavior.

OK, we can still improve the current low light behavior. I'd suggest checking the values and returning 0 instead of altering the value so it's not dividing by zero.

wiring also matters for power issues. is the self test print working without issue? it might help to post in the forums first with photos of your hardware setup: https://forums.adafruit.com/...

The self test page is showing "Flow ctrl: xon/xoff"? https://learn.adafruit.com/networked-thermal-printer-using-cups-and-raspberry-pi/connect-and-configure-printer#step-3111601