I'm using a standard Nrf24l01+ module inside an aluminium case for a remote control application. I assume this will not work (in an aluminium case) because the case will act as a RF shielding thus killing any usable operating range.
One solution that I can think of is making a slot on top of the case to get the PCB antenna out of the case and exposed to air. That might work, but I find it an inelegant solution and I would rather use a small external 2.4Ghz antenna.
I do not want to use the long range Nrf24l01 + PA + LNA with antenna module because my project is a near range application that must be powered with a small battery.
On the other hand, I also found this hack on the internet: https://hackaday.io/page/476-nrf24l01-sma-connector-mod
This looks slightly tricky but I really like that solution if it can be proven to work.
That's how the proposed hack looks according to the link above.
What do you think, is that a proper solution? Other ideas?.