Relay
Aus www.wiki.ardumower.de
Abstract
Using a relay, you can switch on/off external functions (light, horn etc.) on your Ardumower via pfodApp.
Wiring
GND o-----o GND Relais module
+5V o-----o VCC Relais module
Ardumower pinUserSwitch1 o-----o IN1 Relais module
Relais module K1 o-----LED-----o LED supply voltage
Relais module K1 o-------------o GND