I am a beginner to electronics and have a few quick question. I am interested in creating a device that can measure time differences remotely, with as low latency as possible. I was thinking about using an RF tranceiver for this.
The requirements are the following:
It should be able to penetrate through lots of walls (or ceilings) and send a signal 15-20 meters.
It does not have to have a lot of throughput.
It must have very low latency. The transmitter must reliably be able to trigger the receiver at-least, say, 10 times faster than the speed of sound in air (~ 343m/s).
Power consumption is not an issue.
The idea is that I have a vibration at location A propagating to location B (<20m apart), and I want to measure this propagation time. Unit 1 at location A detects a vibration and sends a signal to unit 2 at location B. Unit 2 starts a timer. When unit 2 detects the vibration, it will stop the timer and then know the time difference.
I was thinking about using RF to start the timer at Unit 2, as they travel with the speed on light, thus much faster than the speed I want to measure. I was thinking about using NRF24 for this, but I am not sure it can send signals through 3-4 floors. There seem to be lower frequency modules with better wall penetration, but I fear that they have too much latency.
Can I use a NRF24 for this purpose? If not, any better suggestion?
Thanks for the help.