Querying the state of Line

[ostasevych]

Hi! I am looking for the way to detect power outage in the circuit. Can I use this software code with the usb relay like https://www.aliexpress.com/item/1005006781536777.html for this goal? I mean, I will connect plug to the relay, plug it to the mains line. When there's no power it will send me the alert about that?

[darrylb123]

I don't understand what you are trying to do. Can you attach a sketch of the circuit you propose?

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On Sun, 30 Jun 2024, 11:04 pm Oleksa, ***@***.***> wrote: Hi! I am looking for the way to detect power outage in the circuit. Can I use this software code with the usb relay like https://www.aliexpress.com/item/1005006781536777.html for this goal? I mean, I will connect plug to the relay, plug it to the mains line. When there's no power it will send me the alert about that? — Reply to this email directly, view it on GitHub <#115>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTSUVJS6UGMNZ4Z5VRBHS3ZJ767DAVCNFSM6AAAAABKEC7YLCVHI2DSMVQWIX3LMV43ASLTON2WKOZSGM4DEMRUGY2DONQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[ostasevych]

Quite simple. I would like to detect if there's power in the 220 V circuit, and to send alerts when it appears and disappears.

[darrylb123]

Ok, then this won't help you. It does not detect voltage at all. A 220v relay with the supply connected to the relay coil, with an esp8266 running tasmota monitoring a relay contact might be closer to what you're looking for.

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On Tue, 2 Jul 2024, 12:23 am Oleksa, ***@***.***> wrote: Quite simple. I would like to detect if there's power in the 220 V circuit, and to send alerts when it appears and disappears. — Reply to this email directly, view it on GitHub <#115 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABTSUVNA7U2YUVMIP3LJNGDZKFQ4RAVCNFSM6AAAAABKEC7YLCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMBQGI4TGNZYGQ> . You are receiving this because you commented.Message ID: ***@***.***>

[ostasevych]

Ok, then this won't help you. It does not detect voltage at all. A 220v
relay with the supply connected to the relay coil, with an esp8266 running
tasmota monitoring a relay contact might be closer to what you're looking
for.

On Tue, 2 Jul 2024, 12:23 am Oleksa, @.***> wrote:

Quite simple. I would like to detect if there's power in the 220 V
circuit, and to send alerts when it appears and disappears.

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Reply to this email directly, view it on GitHub
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@.***>

Oh, thanks for the quick reply. May I ask you to send examples of devices/pcb which have this feature? What I need is just detect presence or absence of the power.