I've this RF RX: https://www.amazon.es/gp/product/B073ZW ... UTF8&psc=1
And those remotes: https://www.amazon.es/gp/product/B0768F ... UTF8&psc=1
The receiver is plugged at 3,3v (in 5v PIN it isn't works)
When I run rpi-rf script, It only detects the signal when I push the button with the remote control closer than 3 cm. I've soldered the antenna provided, whit same result.
This is not normal, isn't it?