... I am reading a digital pin, where the output signal of the light barrier is connected. The Input is HIGH when the light barrier has been crossed. I am asking for that signal with if ( input = HIGH) { " start_time = store the actual time, for instance your gpioTick() function " } for the endtime...

hello , i progammed a code for time measuremnts with a light barrier, where the endtime is displayed on a WIFI linked android smartphone. For the time-measurement of start - and endtime i use the function millis() from the wiringpi library. My Question is : How accurately is my measurement ?( I dis...

It's not clear what you are timing. If the time start and time end are detected by the GPIO have a look at my pigpio library. It will allow you to get timings within 5 microseconds of the actual time interval. Hello Joan, thank you for the answer. I am reading a digital pin, where the output signal...

hello , i progammed a code for time measuremnts with a light barrier, where the endtime is displayed on a WIFI linked android smartphone. For the time-measurement of start - and endtime i use the function millis() from the wiringpi library. My Question is : How accurately is my measurement ?( I disp...

hello , i progammed a code for time measuremnts with a light barrier, where the endtime is displayed on a WIFI linked android smartphone. For the time-measurement of start - and endtime i use the function millis() from the wiringpi library. My Question is : How accurately is my measurement ?( I disp...

Thank you very much.Now it works !!

Hallo Raspberry Pi experts... I have a Raspberry Pi 3 and an HUAWEI E3131 USB Surf-Stick. The first thing i tried to was to use this surf-stick as internet-source on my Pi. I saw a lot of things in some forums, with making some changes in the network files but in the end i had no success. According ...