MicroPython Forum (Archive)

The problem seems to be that GP6 cannot be configured as trig. Using other pins as trig, the sensor works properly. The sensor also works fine with GP6 as echo. In the library code, GP6 is used as simple output. Strange thing is GP6 can be used as output to blink an led. I am confused...

It doesn't work using GP6 and GP7 as trig and echo at the same time . Works for GP8 and GP9 and other pins. I used the following library.
https://github.com/rsc1975/micropython-hcsr04

Thanks again for the clarification.

@jimmo Thank you for your help. Using button K1 and RST, the board was reset successfully. I still got two questions regarding the file system: 1. Why reflashing micropython doesn't erase the corrupted file system. 2. Arduino code is burned using stlink, while micropython using dfu. Are codes flashe...

@dhylands Thank you! This is very helpful.

Reflashed firmware and the problem is still there. I even executed some Arduino code to make sure micropython was wiped out before reflashing. Why?

I flashed a BLACK STM32F407ZGT using mcauser's github repo. After resetting the board while connected to the computer, it says main.py was corrupted. How to do a factory resetting on this board? There are instructions for the official pyboard. But it uses green and yellow LEDs to control the timing ...

Thanks a lot. Will look into it.

@jimmo can you elaborate a bit? I use windows and know very little of ubuntu.

FYI. The issue was solved by running the command with sudo.