Printing and placing your QR code

• In the app, open your doorbell and tap Print (PDF) (or Share image to send it to a print shop or a printer app).
• Print on A4 at 100% scale. Choose “Actual size”, not “Fit to page”: the code on the poster is about 9 cm wide, which scans from roughly an arm’s length to a metre away. A smaller print needs people to stand closer.
• Use black ink on white or very light paper. Matte paper is better than glossy, which reflects the sun and porch lights.
• Don’t stretch, crop, recolour or put a logo over the code. Keep the white border around it.

• At the gate or door itself, on the visitor’s side, so people are standing inside your doorbell’s radius when they scan it.
• 110 to 140 cm from the ground: comfortable to scan and reachable from a wheelchair.
• Somewhere lit at night (a porch light or street light), and out of direct glare. Avoid mounting it behind glass or on shiny metal, where reflections spoil the scan.
• Flat and steady: a bent or flapping poster is hard to read. A rigid backing board helps.
• One code per door. Create a separate doorbell (with its own colour and name) for the front gate, the back door, the garage.

• Laminate it, or slide it into a clear weatherproof pocket or an acrylic sign holder. Plain paper survives one rainy week at best.
• Sun fades ink. Re-print every year, or sooner if the code looks washed out.
• A waterproof outdoor sticker or an engraved plate from a print shop works well for a permanent spot.

• Scan it with two different phones from where a visitor would stand, in daylight and again after dark.
• Ring it once yourself and answer from inside, so you know the whole path works.
• If the app says you’re “not at the gate”, stand where visitors stand and check the radius in the doorbell’s settings. The default is 75 m. Make it smaller if your gate is close to a busy street, larger if GPS is weak at your gate (thick walls, trees, tall buildings).
• In the app, Settings → Ring reliability check should be all green on your own phone.

• Open the doorbell and tap Make a new QR code. The old one stops working immediately; print the new poster and replace it.
• You can also block a visitor or a network from a ring’s details, or switch the doorbell off for a while.

It shows your doorbell’s name, “Scan the QR code to ring the bell”, and a small second code for the Sentinel app. It never contains your address, name or phone number, so you can put it where passers-by can see it. Choose a doorbell name that makes sense to a visitor (“Front gate”, “Flat 3”) and keep personal details out of it.