measuring using mouse scroll wheel encoder

[montyfert]

hi im trying to measure filament in mm with a mouse scroll wheel encoder conected to an esp32 ,
middle pin conected to neutral two other pins to 34 (rotary a_n)
and 35 (rotary b _n) of esp32 have googled for info but not found anything that helps.
any help would be apreciated thanks
martin

[sfromis]

The rotary support in Tasmota works with the KY-040, having wiring for both GND/VCC along with A and B outputs. Also a 5th pin for the button of that device, but that's not too important.

Assuming that your unspecified mouse wheel encoder is even using the same quadrature encoding as the KY-040, this still leaves the question of only having 3 wires (instead of 4), and you did not even mention what you did with the 3rd blue wire (unless you by "neutral" instead mean ground, but that's not the middle pin), or how sure you are about the correct selection of the A/B signals.

Tasmota does have a selection for a variation on how rotary encoder signaling works, configuring Option A 5 on some unused gpio will use a mode for the MI Desk lamp instead of a standard KY-040.

Of course, it all also depends on what you do to see if you got data. If you have nothing configured to actually use (or check) the data, you'll see nothing.

[montyfert]

thanks i'll have a look at the KY-040.
martin