I'm using a 4-digit seven segment led and a sunkee soil moisture sensor on a digispark attiny85 usb development board. I'm using the Arduino ide to program the attiny85, and I have things working, kind of.
I have two questions:
1. Is the max voltage input 3.3v or 5v? Do I need a voltage divider if input is ~5v or am I okay as-is?
[spoiler]The sensor I'm using is like this:https://www.amazon.com/SUNKEE-Soil-Hygrometer-Moisture-Sensor/dp/B00AYCNEKW/ref=sr_1_3?s=industrial&ie=UTF8&qid=1480794195&sr=1-3&keywords=soil+moisture+sensor
2. I'm reading the soil moisture sensor analog input on P2 analogRead(0), but readings seem flipped. In dry air it reads ~1016. In water it reads ~275. Is this correct? I may have to adjust my thinking.
This is new to me, so I will not be insulted by any comments.