Around minute 24 there was a discussion about adding a sensor payload like the CTD that has it's own power and microcontroller and communicates wirelessly to the OpenROV. Is this feasible? Would 434MHz be too high (http://shop.moderndevice.com/products/jeenode-kit)? Maybe another set of homeplug adapters would be more realistic?
Since I want to add depth, temperature, and dissolved oxygen sensors, and three water sampling bays to my OpenROV, I've been putting off cutting the acrylic because I wasn't sure if I'd need to modify the design. I want to be able to trigger the water samples from the cockpit based on the sensor readings (three samples because the lakes I'm studying have three distinct layers). Having a self contained expansion payload that can still communicate with the ROV seems like the modular way to go.
I was looking at the MS5535 sensor from meas-spec:
C Code http://www.meas-spec.com/software.aspx#
Bought this DO sensor from Atlas Scientific, but haven't tried it out yet (and just noticed it's only 100PSI):
Just found this link on DIY EC probe and temperature probe: