Karl Jan Skontorp has prepared these diagrams. Thanks Karl!

Karl writes... I use your arbiter to collect seawater temperature and transmit the measurements via wireless to a receiver inside my home. This system is now working very nicely!! I use a receive-transmit set from Maplin, working on 433.920MHz and a transmitting rate of 2400bps. I have two sensors, one measuring the air temperature and the other one measuring about 80cm below surface. The whole thing is working on Lithium batteries from an emergency buoy transmitter.

(The delays in the PIC source were adjusted to run at 2400 bps instead of 19200)