Question: How do I receive input from a absolute encoder that makes it output in hexadecimal/grey code into a Arduino? do I use a digitalRead or analogRead command? I could not find example code/projects with a absolute encoder online.
Overall Objective: I want to use a absolute encoder as a knob for a project. The idea is that the encoder will output its position as a state to be used in a case statement. I.e:
case1: analogRead(absEncdr == 00)
arduino enters idle routine
case2: analogRead(absEncdr == 11)
arduino enters button routine
etc
details: Abs encoder type: 25LB22-G encoder datasheet is here.
I'm using the hexidecimal/ grey code 4-Bit Binary Code Hexadecimal-16 Position encoder version
Basically, I'm not sure how to read in this abs encoder into my Arduino.
To read that you will need four digital pins. You can read the four pins and bit-shift those values into one byte that you can compare to the table in the data-sheet.
byte position = (digitalRead(pin8) << 3) | (digitalRead(pin4) << 2) | (digitalRead(pin2) << 1) | digitalRead(pin1);
Assuming that the pins are named as they are in that truth table in the datasheet.
We are using the OR operator | to put them together into the same byte.