04 · ShellyBASIC

Shelly

The most reliable one for whatever can't fail. It's the only one that, on top of obeying over the internet, knows how to turn itself off: we write a timer into the device itself, so if your house power, your WiFi or our server goes down, the pump turns off anyway. That's what the app calls Secure Run.

01Pick Shelly on the connection screen.
02Pick how to look for it: local network (recommended) or the cloud.
03Over the local network, the app scans your WiFi and lists the Shellys it finds. If none show up, you can type the device's IP in by hand.
04Over the cloud, it asks you for the Server URI and the Auth Key from your Shelly account.
05Tap the device, give it a name and pick the role. If it's a light, you enter the schedule right there.
06Test it with the on and off button before you finish.

FIG 03a · The two paths: local network or cloud.

FIG 03b · Over the cloud it asks you for the credentials, with a screenshot of where to get them in the Shelly app.

Where do I get the Auth Key

In the Shelly app: Settings → User Settings → Authorization cloud key.
The Server URI is right there too — an address like shelly-103-eu.shelly.cloud. Copy both.

Common errors

What you see	What happened	What to do
It finds nothing on the local network	The phone is on a different network than the Shelly, or you're in the browser	Connect the phone to the same WiFi, or type the IP in by hand
“This Shelly is an environment sensor”	It's an H&T or HTG3: it measures, it doesn't switch anything	You still add it, but as a sensor — don't look for a light role on it
“Already registered”	The same device is on another Supercycler account	Delete it from the old account first
You've hit the device limit	The free plan goes up to 4	Free up one you're not using or wait for the plan upgrade

Do this

Leave Secure Run on, especially on the pump. It's the difference between an internet outage and a flooded tent.

Avoid this

Don't give an H&T a light role. It's a thermometer: it has no relay to turn on.

How urgent it is

EssentialThe device responds to the test button.

ImportantSecure Run active on the pump and the light.

OptionalThe H&T sensors from the same brand.