I have got an 12V siren, that I want to convert to a wireless (WiFi, Zigbee or Z-Wave) or Ethernet connected. It does not need to be battery powered.
I have ideas about an Arduino or RPi, but need some advice.
The goal is to switch the siren on or off from Home Assistant.
A wallplug to control the main input (230V) is one solution, but I prefer something smarter…
I would maybe prefer Zigbee, as it require less of my network (LAN/WLAN) to work, as it can communicate directly to the Zigbee network.
Please hit me with some more ideas!
@sparkydave I see! I was just more thinking about the need of having a working WiFi network in case of powerloss. But I have UPS for most of the devices.
I have read some more about the Wemos D1 Mini now. I tend to go for that solution together with an Relay Shield and one Power Shield (to have a single 12V input).
If I should use Zigbee I consider buying a wall-plug and take it apart (remove the 230V things), and keep the Zigbee and relay units. Power needs to be solved.
For my sirens I flashed an amazon Wifi plug with tasmota. Then plugged a 12v inverter into that plug and wired it to the siren. I liked Tasmota because I could hardcode things like retaining it’s previous state in the event of a power outage, it also has teleperiods so it can send it’s status to HA as often as I need. Which also acts as a sort of watchdog too, in the event someone unplugs it, I’ll know. Best of all, it’s out of the cloud.
Another solution is if you have an always-on computer, they usually have spare 12v and 5v rails. I have a D1 wired to my comp with a $2 Alixpress adpater plug. Motion sensor,temp/humidity/ws2812 led and a relay board all work fine off it.