Arduino Uno R4 WiFi LESSON 43: Incorporating a PIR Motion Sensor Into Your Arduino Project

Pick your Sunfounder kit up so you get the same results I do:

You can pick up the neat jumper wires I showed in the video here:

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In this video I show you how to incorporate a PIR Motion Sensor into your Arduino project. The PIR sensor detects infrared, which is heat, and it detects motion. Therefor it detects warm moving objects. This is a great feature for projects associated with alarms. It has few false alarms because it looks for things that are both warm and moving. Enjoy!

#arduinor4wifi
#PIR
#motionsensor

[gregp]

I hadn't taken the buzzer and transistor off the breadboard from the previous lesson so I combined that with this one to make the buzzer sound when motion was detected.

[kumardivyanshu]

SIR WE SHOULD NOT USE INTEGER IN THE DELAY STATEMENT YOU ARE THE ONE WHO TOLD US THAT IN YOUR AWESOME PREVIOUS TUTORIALS ON ARDUINO

[alfredcalleja]

Hi Paul, thanks again for another interesting tutorial. Over the last week I got distracted from Arduino by going back over my vPython projects. I hadn't looked at vPython for months and found that I'd forgotten everything: and I mean everything. I've since got back up to speed and came to realize how elegant Python code is when compared to Arduino. Thanks again for both Python and Arduino.

[DJL_Designs]

Got it to work :) looks like a complicated little component but turns out it is very easy to use! Thank you for the explanation

[elevatedviewstcl]

Hi Mr. Paul. You may have this lesson planned, but I think a good lesson would be how to use the internal RTC on the R4 WiFi!

[Rene]

Thanks again Paul! Unfortunately my PIR-sensor seems to be broken and only returns HIGH (or 1). Turning the potmeters don't affect it either 😞 PS. After some searching I found this to be a common problem with this sensor. There are a lot of solutions to get it working. For me it was the voltage on the collector: switching from 5V to 3.3V made the sensor working properly...

[sweetdragon]

While this works well, a better project would have incorporated a blinking LED and a loud buzzer when movement is detected. Good project!!!

[sweetdragon]

I didn't see you create a delay variable?😄

[RawrxDev]

It would be nice if you went over checking the component datasheets to see some of the values required for the math

[vDCme]

Thought of you Paul when this guy explained "States" ... oh he's the smartest guy in the world