Hi all, I bought 2 A0221AU UART ultrasonic distance sensors. I tried both with the official arduino code on an Arduino Uno R3, checked the code several times, ... but the sensors (both were tested repeatedly) does not measure the correct distance. Most of the time, the same distance is given (val…

A0221AU ultrasound distance sensor

noiasca June 6, 2025, 1:37pm 5

here I have an example for the A02YYUW:

it seems it has the same protocol.