I am currently learning the usage of GPIO pins on my Raspberry Pi 3.
I have now a basic understanding of how to control the GPIO pins via Python, I am able to light up a LED, capture a button press or control a relay.
I bought this bundle on AliExpress which contains STX882 (transmitter) and SRX882 (receiver).
Now, I would like to remotely control (from my RPi) a 3V relay which should then, after being turned on, control a valve to my garden watering.
I understand how to connect the STX882 transmitter to Raspberry and send data though the GPIO pins but I do not know, how to assemble the other side with the receiver. I have a problem understanding how these two pieces (transmitter connected to RPi and receiver connected to the relay) are paired to each other and what data to send to the receiver to turn the relay on.
Thank you for your tips.