Yoctopuce I/O Actuator Sensor
Tools.Valarm.net monitors these sensor modules connected to your sensor hubs.
This IO sensor device provides 4 digital I/O pin connections. Each connection is electrically insulated from the USB bus.
Without an external power source, each I/O pin can receive or produce a digital signal at 3V or 5V levels (low current).
With an external power source, the device can work with voltages up to 28V and deliver up to 250mA per channel, which makes it possible to drive small relays.
If you need more channels, you can use the Maxi I/O sensor module.
You'll connect these sensor modules to any of your sensor hubs, like GSM, Ethernet, or WiFi.