I want to send information from my Attiny85 to my Raspberry. For the moment. Attiny and Emitter work on 5V Emitter have a 433 Mhz 1/2 waveform antenna I'am using virtual wire
Raspberry receiver work on 5V with 430 ohm resistance for data. I use vw.py python program
All this work fine 0-1 meter, badly (10%) at 2 meters and not at all more far away. Problem, my desk is about 4m far away the Emitter. How can I improve this range ?
My idea : Using 12v input for emitter with 7805 for Attiny and a low cost NPN transistor between Attiny data pin, 12v and data of emitter.
Is my idea good ? Do you have other idea ?