Unable to set line 18 to input

[Mogabow]

Hello, I am using a Raspberry Pi 4 with a DHT11 module and used the code given in the example "simple dht test" while changing it to the pin I am using. The first time running the programs works fine. However, after stopping the program and running again I end up with the same issue where it says "Unable to set line 18 to input". Does anyone know how I can prevent this. apologies if anything was vague I am new to this. Thanks

[jposada202020]

@Mogabow No worries, in order to understand this better couple of questions: Are you using the Blinka library in your pi? According to your description I am guessing that you are talking about the actual error raised and not the line in the simple_dht_test.py script. am I right assuming this?

[Mogabow]

@jposada202020 Thank you for the fast reply! I am unsure if I am using the Blinka library however I did install the Adafruit_CircuitPython_DHT there seems to be no error in the lines of the script the error only rises when I try to actually run the program for the second time after turning on my Raspberry Pi. I have used the following coding on python 3 to run the program. New Text Document.txt The first time I run the program I get the following values which prove it is working fine, with errors from time to time that automatically fix themselves. But if I stop it and try to run it again I get this message in the shell.

hope that clears the questions you had.

[jposada202020]

@Mogabow No problem, my favorite library in the whole world :). I need to connect my raspberry 4. But if you need more hep you can join the Adafruit discord channel and the question in help-with-circuitpython.

[Mogabow]

@jposada202020 thanks! would you mind sending me the link to the discord channel? I tried to have another go at it with no success.

[jposada202020]

@Mogabow https://discord.gg/adafruit leave the question in the sub-channel and we can discuss, I tried yesterday starting and stoping to see if I can reproduce the failure without succes, but maybe I am missing something. Thanks

[caternuson]

However, after stopping the program and running again

Is your program an infinite loop that you stop via <CTRL><C>?

adding some related forum threads for tracking: https://forums.adafruit.com/viewtopic.php?f=19&t=169472 https://forums.adafruit.com/viewtopic.php?f=60&t=175209

[Mogabow]

thank you for your reply. Yes, it is an infinite loop that will keep on getting readings. using <CTRL><C> interrupts the code and rerunning it again gives the error specified above. I am reading the forum threads and attempting some changes to the code now.

[jposada202020]

@caternuson Thanks

[Mogabow]

Hello, once again I would like to thank you all for the help. I have followed the forum's and tested if all my libraries were correctly installed and up to date, which they were. I have then tried to use the pulse in command, which end up with the error DHT sensor not found, check wiring so i checked the wiring but I am quite certain they are connected properly otherwise i would not be getting values without the pulsein command the first time i run the program. I have also tried the code in the forum provided above where the program attempts to restructure things to try and catch the and call the deinit stuff, but without much success.

[caternuson]

@Mogabow In your first post it sounded like it was working.

The first time running the programs works fine.

You are unable to repeat that previous success? (getting it to work on first run)

[Mogabow]

@caternuson @jposada202020 alright after I updated the libraries now it works, I was using the wrong code after updating the libraries. Silly mistake on my part. Thank you so much for all your help!!

[jposada202020]

@Mogabow No problem Thanks to @caternuson he make the link here