433MHz RF “Hello World” on the Raspberry Pi - Hackster.io
Let Raspberry Pi's communicate with each other per 433MHz wireless signals
Build a 433MHz radio chat device — The MagPi magazine
433Mhz RF Wireless Transmitter Module and Receiver Kit XY-MK-5V DC Wireless For Arduino Uno R3 Raspberry Pi /ARM/MCU WL Diy Kit Remote Door lock System etc: Buy Online at Best Prices in
RF Transmitter Receiver 433Mhz RF Radio Module Online @ Best Price
Using 433MHz RF Modules with Arduino | DroneBot Workshop