Seatalk1 - alternative uses

If you do not have a Seatalk1 network you can also use this connector to detect the status of some sensors using up to 12V without damaging the Raspberry.

One of the applications could be to measure the engine RPM by connecting the 'W' terminal or tachometer signal wire. This would be configured in the Pulses tab of the GPIO app.

Another application could be to detect when a reed switch has been activated. In the following example you can see how to connect a float switch to detect the liquid level of a tank or bilge. After wiring as below picture, go to the GPIO app, Digital tab and click Add input. Select GPIO 20 in GPIO field and none in internal pull resistor field. Select a state and write a message for each of the possible high or low states. Finally select visual in method and click OK to check the operation of the detector. In addition to visual and sound warnings, you can use the Notifications app to assign Actions to each of the defined states for the Signal K key “notifications.GPIO20”.

Seatalk<sup>1</sup> - alternative uses

Important

Always follow our safety tips before making any connection.

LEDs

□ off | ■■■ blinking | ▬▬ fixed

LED RX TX Description
Seatalk1 □ Input is low.
Seatalk1 ▬▬ Input is high.