Hi Andreas, I'm so sorry for the delay. I was working on another project now, and I wasn't entirely devoted to this. I looked at it at the weekend and the modified code is working. I have only tested OpenWRT in build - r10204-38b22b1, kernel 4.14.125. I do not expect complications on other platforms.
I tried it on several sensors. I was primarily interested in JSN-SR04T (https://www.makerguides.com/jsn-sr04t-arduino-tutorial/). I have also verified other designs (https://randomnerdtutorials.com/complete-guide-for-ultrasonic-sensor-hc-sr04/). It generally works. Relatively accurate for the area up to 2.5 m. However, if the distance is longer, it starts to fizz, depending on the sensor design. It is a property of used HW and its construction. I do not know how to do this in the development of drivers, whether it makes sense to put a filter directly into the driver or at least pull the maximum distance parameter as a variable? Anyway, the change made works. Zbynek --- email: [email protected] phone: +420 224 354 054 web: http://www.fel.cvut.cz Department of Telecommunications Engineering Faculty of Electrical Engineering > On 7 Sep 2019, at 11:46, Andreas Klinger <[email protected]> wrote: > > Hi Zbynek, > > do you have any feedback for us? > > Thank you, > > Andreas > > > Zbyněk Kocur <[email protected]> schrieb am Mi, 26. Jun 21:50: >> Thank you, i will write a feedback after testing. >> >> >> Zbynek >> --- >> email: [email protected] >> phone: +420 224 354 054 >> web: http://www.fel.cvut.cz >> Department of Telecommunications Engineering >> Faculty of Electrical Engineering >> >>> On 26 Jun 2019, at 21:49, Jonathan Cameron <[email protected]> wrote: >>> >>> No rush, it's a clear fix anyway so we can queue this up >>> in the rc phase of the next kernel cycle! >> > > -- > Andreas Klinger > Grabenreith 27 > 84508 Burgkirchen > +49 8623 919966 > [email protected] > www.it-klinger.de > www.grabenreith.de
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