Hello. I was wondering if there is a way to send data wirelesly from sensors (like PIR motion sensors) to an arduino board without using two arduino boards.
I assumed that it would work to connect a PIR sensor to a "RF Link Transmitter" but someone said it needs code on the transmitter end too. So is is some kind of component/controller that can make the PIR sensor send data to the RF transmitter?
The idea would be to have one ardiuino board in the house and 2-3 wireless pir sensors around the house for an alarm :)
Or maybe there are some cheaper smaller Arduinos so I use them on each sensor?