Mera ko ek sanitizer machine bana ke ha usme pir sensor use karne ha per without Arduino.uska connection kese hoga janna tha.
Please describe your project in brief.so I can suggest you .
Sanitizer machine like sanitization room /tunnel?
If yes than you have to connect Arduino uno or any other controller.
Why requirement of controller is there?
Ans-> U have to design your machine in such a way that it works automatically. U have to interface of and sensors there.
Have a good day!
Check this project https://www.boltiot.com/projects/sanitize-to-fight-covid-19-using-bolt-iot
Do let me know in case you need further assistance.