I've just got my Nrf24l01 but then I found out that the working signal range for the module is 100m and above. Our real intention for the module is to let the nrf24l01(Receiver) out of range for about 5m in order to activate the alarm.
The purpose of our project is for anti-theft alarm which sounds the alarm if the module is out of range. We only need a short distance in order for the alarm to work since our research project is only for personal use.
We have an idea which we want to clarify if it is possible, it works by having the (receiver) to reach a fixed distance value in the coding of the arduino and when the (receiver) goes beyond that value, it will activate the alarm or beep. We want to ask if our idea is possible and if yes, can you help us how to code the arduino?.
I don't have any background in making a code for arduino but I know how to program an arduino using a ready-made code from the internet.