Boat Monitoring Hub Sentinel with Battery Voltage, Digital I/O and Environmental Sensors

Sentinel Hub is a wireless interface extension of the Boat Monitor device.
It is used to add additional inputs and outputs to existing range of Boat Monitor sensors.

It can be used to measure battery voltage, current through a shunt resistor, two digital inputs, temperature,
humidity and air pressure. At the same time both digital input pins can be configured as digital outputs allowing remote control of external devices.