@gohan
I was referring to @berkseo 's situation and images/examples. I just wondered why this person would put this amount of effort in creating a device that would probably not be functional at the moment it should be functional. I'm just thinking about corrosion of the pcb, a drained battery, change of properties of the 'sensor' due to time-effects etc.
Do not misunderstand me: I'm absolutely enthousiastic about this device (and I'm impressed by how small it is and the design), but I'm a bit concerned about the effects that could negatively affect the behaviour of it.

@berkseo

I do not want to be too offensive, but it seems to me as if your skills in electronics and 3D-printing is way better developed than your trust in the plumbing

Now for the serious part: how often do you experience water leaks? And how long do the batteries in this design last?

Boozz

@mfalkvidd
Thanks!
I guessed something like that, but couldn't find it in the API section

@yveaux

Ok, great! I presume it requires me to set this pin somewhere in the #define section? Could you hint me what variable is used for that in the config section? I guess the MY_RFM69_IRQ_PIN is not the proper one.

About the other interrupt pins: That's an interesting one. I only know of pin 2 and 3 being the interrupt pins on a pro-mini / nano. Is it possible to use other pins for that? If so, how to achieve that?

@scalz

That would mean IRQ on pin 2 (pro-mini or nano)?
Could be a wire-bridge for a lot of my boards I think...

@adamant
Are you sure the Atmega328 has a bootloader installed yet?

Have a look at this link. Might be of help.

Boozz

@tbowmo

You mean this item?:

I never used the CE pin via a level converter up till now. I use 3 of them and some have ran for over 3 years now. So I guess they must be 5V tolerant.
Of course, power pin should be 3v3.

@mfalkvidd
I think you’re right. I only had a look at the first image and there the C1 location was not visible as the nrf-module was in front of it.
My bad

@openhardware-io
Looks as a nice and clean design. Too bad you didn't place a capacitor near the power pins of the nrf24L01+ module.
With my UNO I only got this module working when adding the capacitor...

@rocksolid
Have a look at a RCWL-0516 "radar" sensor. This fits exactly your latest specs you posted. It's a rectangle, long and thin.

I'm using these sensors to detect the presence of living objects.