Why not purchase a Raspberry Pie and a SD card + casing , then you have a server?

@noclue said in Sensor advice:

@hj_sk I want to control my idea. I have put my ideas out there before, only to be stolen.

either do as Tbowmo suggests, or if you are afraid that we will all steal your idea, I can recommend to contact a electronic development company, that will sign a non-disclosure contract, a company could be this one (I'm not affiliated with the specific company)
https://www.prevas.com/

Typically wifi consumes considerable energy for handshake so use wifi on battery isn't the greatest idea. but using it with mains power is quite good

If you want to use battery operated devices, you must use a better protocol than wifi

https://electronics.stackexchange.com/questions/462754/how-to-send-the-key-sequence-ctrl-q-to-a-serial-port
https://forums.ni.com/t5/LabVIEW/How-do-i-send-a-quot-Ctrl-C-quot-character-to-serial-port-RS232/td-p/24213?profile.language=en

https://duckduckgo.com/?q=termite+ctrl-q&t=canonical&ia=web

Where I work we do all inhouse and we won't work as a sub supplier. but I know we have in some cases used this company when we didn't had capacity in our own factory for small prototype series

https://www.hp-elektronikmontage.dk/

As you just started your company and to hold back the money, why not as a start get someone to solder the boards for you? yes it's more expensive per board, compared that do it yourself, but then you don't need to spend money on a reflow oven that maybe isn't worth the money

Then when you have a cash-flow in your company and earn money, then you can start to purchase equipment

Depending on what you need to solder, you might need to also use Nitrogen, to get better solder-ability.

Then again it's difficult to provide your an advise, as noone know what your requirements are?
I work for a hearing aid company, and it's a medical device (FDA are inspecting us), which require the oven to be validated- and this requires s a lot of documentation.
We use Rehm ovens with nitrogen, and most likely this isn't what you need

https://www.rehm-group.com/en.html

@toccaraknauss Welcome

Why not as proposed make a small hole in the wall and insert maybe Si7021 sensor into the hole in the wall:
https://www.mysensors.org/store/temperature

But something else, why is the father not finding the rootcause for the wall to become wet?

To prevent false alarms is quite difficult,

1. as you might think a high acceleration (during falling) and then no movement after he have fallen and lies on the floor.
2. but false alarm could be he just sad down very quickly in the sofa and then relaxes
   how to distinguish between scenario 1 and 2 ?!?

Maybe you also need to check his pulse?

I don't have a google box, but can that be set to listen always, and if a sound similar to his fall are recorded then you shall be alerted?

You need this type of sensor: https://en.wikipedia.org/wiki/Accelerometer

MPU-6050 3 Axis Accelerometer + 3 Axis Gyro
https://www.mysensors.org/store/motion