Reading Wireless Air Transmitter using Arduino

[lidas123]

Wifi and BT are both very high frequencies 2.4 to 5Ghz) compared to 38kHz, so do not travel very far underwater (mm to cm). Neither is a good choice underwater.

thanks for the reply, but then what do you recommend?

 

[tursiops]

thanks for the reply, but then what do you recommend?

What distance do you need? How much data to transmit? Simple pulses, or lots of structure? Analog or digital? How much power do you have available? Why not acoustics rather than RF? One-way or two-way?

You should start a new thread; your project is not really related to this one.