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.

 

[Avataar120]

Working ...
Unfortunately, 2 little issues on the PCB schematics to be solved in the next version, but encouraging !

 

[Avataar120]

Still progressing waiting for the new PCB version :

 

[Avataar120]

There we are ! Final PCB works like a charm
Very hapy with the result

Features :
- Battery operation
- Charge through USB C (Red & green LED indicators)
- Time management (not perfect - but I will introduce later a quartz to get very precise date / time)
- Read all MH8A transmitters (Sherwater, Aqualung, ...)
- Deep sleep to save battery charge (wake up with button - sleep 1min after last received frame)
- Log of all readings (Date&Time, ID of transmitter, pressure, transmitter battery status)
- Wifi Access Point to allow very simple connexion

Link to video :

Thank you again for your efforts to decode the signal content !

github - Avataar120