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Configuring the Shelly BLU Wall Switch 4: why the buttons do nothing
All four buttons show in the app, you can see the click, and the scene does nothing. Two pieces are missing, and neither is where you are looking.
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Which Shelly EM to buy for a V2C Trydan charger
The classic EM and 3EM work; the EM Gen3 does not, because the integration reads one specific API. Where each clamp goes, and why it needs a fixed IP.
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The Shelly EM reads low at low current: why, and how to prove it
Between 1 and 1.5 A is 2-3% of full scale on a 50 A clamp. The check that tells the device’s limit apart from a wiring fault.
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Automating a garage door from your phone
The control board already has 12 V and a button input waiting for a contact. The remote keeps working, and momentary mode is not optional.
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Opening the street door from your phone with a Shelly
The 1PM Mini will not do: it gives 230 V instead of a dry contact. And you wire to the door release, not the button. Analogue yes, digital bus no.
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Synchronising several Shelly Dimmer Gen3
Local actions, app groups or cloud scenes: only one is instant and works without internet. And why same model, same load is not fussiness.
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Shelly DALI Dimmer: what it can and cannot do
It works in broadcast mode: every driver as one group. It powers about 5 drivers and does not control colour temperature. Worth knowing beforehand.
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Shelly Pro 3EM-3CT63: frequently asked questions
The 9 mm opening, the cross-section versus diameter mix-up that causes most returns, and how it differs from the Pro 3EM.
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Shelly Pro 3EM: frequently asked questions
Why it powers from phase C, what the 30 VA threshold means, and what the phase-sequence error is actually telling you.
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Shelly Pro EM-50: frequently asked questions
How far it measures, why a 2 A relay cannot take a water heater, and what accuracy to expect. The questions that come up most, with the figures.