Thank you.You re right, i send that post after i tried that module. That HCSR-04 module isn't for Grove, it use 4 pins (VCC, ground, trigger pin, echo pin) . It works very well but..
This is my project : i have a mini-robot made with arduino (Uno, motor shield, ultrasonic sensor, servo) and i want to make it again in M5Stack and micropython context. So i bought the GOPlus element that provides controls for 4 servos connexions, 2 independant motors, 3 more grove ports.
The problem is : when i use at the same time 1 servo and the basic 4 pins Ultrasonic function, the Echo Pin creates an ERROR on the M5Stack .
That s why i wanted to try the grove Ultrasonic.
But it s using only 1 pin for trigger and echo.