ekmallon / uno-breadboard-datalogger Goto Github PK

Thanks for your excellent work on open source data loggers. It jump started my very similar project.

However, when I uploaded this code on my Arduino Nano, with a near identical setup to this tutorial:
https://thekurks.net/blog/2018/2/5/wakeup-rtc-datalogger#anchor-link-5
the board didn't spend any significant time sleeping. I guess it just woke up immediately after going to sleep or something. I commented out all the parts related to analog signals and LEDs.

Once I added this line
pinMode(RTC_INTERRUPT_PIN,INPUT_PULLUP);
to the setup, it started working the way I would have expected. Also, the RTC_INTERRUPT_PIN variable is not used anywhere in the code. Did you just forget it?

-Antti

I found your blog post about ADC resolution while attempting to reduce the ADC noise I'm seeing on one my projects.
https://thecavepearlproject.org/2017/02/27/enhancing-arduinos-adc-resolution-by-dithering-oversampling/

One thing that helped reduce the noise was adding some settling time after changing the ADC Mux. Where you want to add noise, you can probably do that without any external components by switching the Mux input just before taking your intended reading.