Here's a quick all round look at how the Mercator Origins telemetry console is shaping up. V2 will address the hot glue goo around the magnetic reed switches that's looking a bit messy.

So what can we see?

* 2 x M5 Stick C Plus ESP-32 Microcontrollers each with screen

* Magnetometer and Accelerometer Sensor PCB to implement tilt-compensated digital compass

* Lux/Colour/Gesture Sensor PCB

* On the rear of the case: depth sensor rated to 300m and 2mm resolution.

* Phototransistor/Resistor at the end of one of the sticks that's picking up the signal from the hidden Infra-Red diode to obtain one extra output. It's needed because I've run out of physical output pins on the sticks and it's used to activate the serial transmit line back up to the float. Without this the comms wouldn't be biddirectional!

* On the back you might just see a dual-line copper wire that encircles the back of the inside of the case. This is the leak detector.

* On the back the blue PCB is the RS485 up/down link booster for communication with the float.

* Two button mounts that enable the physical gopro case button pins to activate hidden tiny microswitches to feed user button input into the sticks.

and hidden from view....

* Temperature, Humidity and Air Pressure sensor to measure internal environment.