Hi All,
Just wondering if anyone had any experience with something similar to this?
I'm looking at finding a solution to a problem where I need to be able to remotely send a small amount of data (8-10 Bytes) to a sealed box which could potentially be buried under 300mm of water/concrete/soil. Ideally I'd like to be able to send this data from 50-100m away from the box.
I had looked at some low frequency magnetic transmission techniques which appears to have good field penetration through non-ferrous materials, but most of the info I can find on this is for very short range PAN type applications. Attenuation of the signal seems to be very large over a relatively short distance. I wonder can this be scaled up to the distances I'm talking about?
I also looked at VLF data transmission similar to what is being touted for communications down mines etc. I aim to get some pieces of hardware to have a play around with this and do some experimentation to see how it performs,
Does anybody else have any ideas as to what may be out there that I haven't considered?
rgds
P