Raspberry Pi Code does nothing...

[Megaflow]

Hi

I have trying to connect a two wire reed switch anemometer to a Raspberry Pi to measure windspeed.

The project below has given me some code which I have created, but when I run it, nothing happens, literally nothing, the terminal window just returns to root. Can anyone point me in the direction of where I might have gone wrong?

Project:https://projects.raspberrypi.org/en/projects/build-your-own-weather-station/5[url]

Code:
|https://forums-images.pistonheads.com/49602/202502155348807[/url]

Result from running it:

[FlossyThePig]

Off the top of my head don't you need
speed = wind_count
at the end of the spin() routine

[essayer]

It has no code to make it wait for a button press, so just runs and immediately exits. Normally there would be a while loop or similar that waits forever

If you can find a demo project from the button library, copy that and add your code into it

Edited by essayer on Saturday 15th February 17:49

[Megaflow]

It occurred to me the instructions were telling me to write it in Idle or similar on the Pi, and I was writing it via Terminal on the Mac.

I plugged a monitor into the Pi and opened Thonny which told me there was a problem with the tabs on lines 7, 8 & 9. I have corrected that and I now get this mess:




ETA: Searching seems to suggest the GPIO is already in use, and running gpioinfo brings up all the pins and showed 5 as in use, restarting the Pi and it is no longer in use, but I am now back to the code doing nothing again...



ETA2: It seems my pin out diagram was wrong for my Pi and I was connected to what I thought was GPIO 5, but in all likelihood was GPIO 24 because connecting to a different pin, I have now got the script to count spins, but it will only do it in Thonny, not through the terminal window, I suspect this is because the code is incomplete. I shall carry on reading the project now I have got that part to work.

Edited by Megaflow on Saturday 15th February 16:20

Edited by Megaflow on Saturday 15th February 16:31

[frisbee]

Are you running it in IDLE? You would need some sort of shell to see any output from the call back you've assigned to the GPIO.

[Megaflow]

frisbee said:

Are you running it in IDLE? You would need some sort of shell to see any output from the call back you've assigned to the GPIO.

I am now running it in Thonny, similar to Idle, and I can see the output in Shell, that enabled me to get the script to count spins and see them.

ETA: Much messing around, not actually sure I know what I am doing and we have a code that runs in terminal on the Mac:




Sadly I have got no idea if it is accurate or not because the eBay seller, who claimed to be in Ireland, but was actually in Hong Kong and took 3 weeks to deliver the anemometer has failed to provide any kind of calibration data for it and it seems to produce more than 1 actuation per rotation, so I need to work out a way of calibrating it. That is a challenge for another day.

Edited by Megaflow on Saturday 15th February 17:30