Practical usage of the built-in hall sensor

[jcsbanks]

Could an external capacitor be used to add some filtering to the noisy readings?

[lucas77]

Hi, anyone has used the built in hall effect sensor with interrupts? my goal is to count revolutions of a wheel (Bicycle), son can calculate speed. So, I want to use the built in sensor, and got 2 problems: first, can´t figure out how to make an interrupt on each revolution, lots of projects already solved the problem using an external sensor; the second problem, is that the initial value of the sensor (without and magnet near) is different for my 4 Esp43 Wroom 32U boards, so the function I made doesn´t work well for all of them.