Method 2: Before doing the Method 1 it may be less effort to write it in Arduino and use either a PWM read library or use a interrupt to measure the pulse width. You can also read the low time to determine if the input signal is valid or not eg. to detect signal loss.

Method 3: This is the simple but ugly workaround! Add a small Servo to your signal and drive a potentiometer which ist then read by the M5 analog input.

But if I can get delta time between it change from 0 to 1 and change back from 1 to 0 it will work. But UI FLOW don't have any block that can read processing time. So it impossible to read duty time with digital pin read only.

sorry, uiflow now not support it

• analog read will read voltage input from 0 V. to 5 V. in this case it will pickup either 0 V. or full 5 V. (depend on PWM duty when you read it). So analog read is useless for this case.

• digital pin read is just get 0 or 1. But if I can get delta time between it change from 0 to 1 and change back from 1 to 0 it will work. But UI FLOW don't have any block that can read processing time. So it impossible to read duty time with digital pin read only.

I want to read Standard RC PWM input signal on port A (or B, C). Standard RC PWM signal is between 1.5 ms to 2 ms and have timeout at 20 ms. How to do it in UI FLOW.

PS.
Something that similar to "pulseIn" command in arduino?

there isn't a dedicate pwm read block,( and I am way behind with my experiments,) Have you tried playing with the analogue or digital pin reads?