230V AC to digital interface

[rozpruwacz]

Hi,

I have a regular light switch which turn the lamp on/off. Now I would like to replace a lamp with some kind of device that will provide low voltage logic to the arduino. When the switch is on, the voltage is say 5v and when the switch is off the voltage is 0v (or vice versa). I found something like this:

https://pl.aliexpress.com/item/1-Bit-AC-220V-Optocoupler-Isolation-Module-Voltage-Detect-Board-Adaptive-For-PLC-Isolamento-Fotoaccoppiatore-Module/32828243283.html?spm=a2g17.search0104.3.2.I8CRi4&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10065_10151_10344_10068_10345_10342_10343_10340_10341_10171_10541_10562_10084_10083_10304_10307_10301_10060_10155_10154_10056_10055_10539_10537_10312_10536_10059_10313_10314_10534_10533_100031_10103_10073_10102_5680020_10557_10142_10107,searchweb201603_25,ppcSwitch_2&btsid=3176aed1-0317-4e02-87b3-0f07619b0ee6&algo_expid=672ef747-29a0-4b74-ba7a-ed92cd5b5289-0&algo_pvid=672ef747-29a0-4b74-ba7a-ed92cd5b5289

but are there other options ? are there some ready made devices with certification ?

[archiijs]

Hi, I am interested in this as well, I got the old wood boiler and all its smarts is by 220v and thermostats and relays. I would like to interface those signals with Arduino for displaying some of the boilers states and then maybe automate some things afterward.

Til now I thought about a lot of 5v chargers, but this module seems to be more compact.