I have seen a few topics with suggestions for wireless sensing - using a RF connection to let several cheap and cheerful Arduinos send data back to a Raspberry PI, but these posts are embroiled with lengthy requirements - or half solutions.
I wondered - what is the easiest and cheapest way to let i.e. a door sensor/ PIR and temp sensor all connected to individual Arduino Nanos/Minis post data back to a master Raspberry PI? I have seen some code working with the HC-05 on the Arduino end - and this looks straight forward, but what about the PI - in Python for instance?
I have seen the 433mhz modules - but it looks like these use manchester encoding, which could be CPU intensive and hard to get started with. ESP8266 is listed and also HC-05 as a Wifi and Bluetooth serial link. Has anyone used either of these modules, can you help?
Thanks in advance,