I have seen that the PX4FLOW Module is available in a lot of aliexpress shops.
Is there also a shop in germany or switzerland or somewhere else in europe where I can buy this module? How is the quality of the modules in aliexpress? Is this no problem?
I was also only able to find them on aliexpress. I have no problems with them.
One piece of advice: You will probably not be happy with the sonar range sensor on the board (this has nothing to do with it being from aliexpress). I’d recommend getting a module without the sonar and getting a separate, light based, TOF range sensor.