Connecting Canon EOS R3 to the Intervalometer App

Step-by-step instructions for pairing your Canon EOS R3 with the Intervalometer for Canon app over Bluetooth.

App Store

Google Play

Before you start

When the Intervalometer app first starts, allow Bluetooth access so it can discover and connect to your EOS R3.
Allow the app to use location / localisation services when prompted. On many phones this permission is required by the operating system to scan for nearby Bluetooth devices, even though the app does not use your location for tracking.
If the camera is already connected to another device via Wi‑Fi or a wireless LAN, pairing will not work. In [Network settings] choose [Connection settings] then [Disconnect] first.

Pair the EOS R3 with the Intervalometer app

Enable the network on the camera.
Press the MENU button and select [Network settings].

In [Network], select [Enable].
Open Bluetooth settings.
Press the MENU button again and select [Bluetooth settings].
Select Smartphone.
In [Bluetooth], select [Smartphone].
Select Pairing.
Choose [Pairing] to start the pairing process.
Skip the QR code screen.
The camera shows options to install an app via QR code. Because you already have the Intervalometer app installed, select [Do not display].
Open the Intervalometer app and tap "Add new camera".
Unlock your phone and start the Intervalometer for Canon app. In the main control screen, tap the camera icon labelled Add new camera.

The app now scans for nearby Bluetooth devices and lists available cameras.
Select your EOS R3 from the list.
When your camera appears in the list, tap the entry that matches your EOS R3 to start pairing.
Confirm Bluetooth pairing on your phone.
Your phone shows a Bluetooth pairing request. On iOS, tap Pair when prompted. Confirm the request to allow the Intervalometer app to connect to the EOS R3.
Confirm OK on the camera.
The camera shows a pairing confirmation screen. Select [OK] and press the SET button to complete pairing.
Pairing is complete.
The camera is now connected to your smartphone via Bluetooth.

In the Intervalometer app, your EOS R3 appears as the active camera and the main control screen is ready to trigger the shutter.

After pairing

Once the connection is established, you can start and stop exposures from your phone without touching the camera.

Set exposure time and interval directly in the app.
Use BULB mode on the camera and let the app control how long each exposure runs.
Run an open-ended sequence or stop automatically after a chosen number of images.
Use the Bluetooth link to minimise camera shake when starting and stopping exposures.

Cancel pairing and start again

If you change phones or run into connection problems, delete the existing pairing and set it up again.

On the EOS R3

Press MENU and go to [Bluetooth settings].
Select [Check/clear connection info].
Press the SET button and select [OK] to clear the paired smartphone.

On the smartphone

Open your phone's Bluetooth settings.
Find the entry for your EOS R3 and remove or forget the device.

After removing the pairing on both camera and phone, follow the steps in the pairing section above to connect the Intervalometer app again from scratch.

Troubleshooting

Phone cannot find the camera

Make sure the camera has completed the pairing steps: [Bluetooth settings] → [Smartphone] → [Pairing] → [Do not display], and that you selected [OK] on the pairing confirmation screen.
Check that Bluetooth is enabled on your smartphone and that [Network] is set to [Enable] in [Network settings] on the camera.
If the camera is connected to another device via Wi‑Fi, disconnect it first via [Network settings] → [Connection settings] → [Disconnect].
If the camera still does not appear, clear the connection on both devices, restart both, and try again.

Camera shows a different smartphone name or will not pair

On the camera, go to [Bluetooth settings] → [Check/clear connection info] and clear the currently paired smartphone.
On your phone, remove old EOS R3 entries from the Bluetooth device list.
Repeat the full pairing process, including tapping Add new camera in the Intervalometer app.

Intervalometer app does not connect, but the camera shows a paired phone

Make sure no other app is controlling the camera in the background. If you use Canon's Camera Connect app, close it completely before using the Intervalometer app.
In the Intervalometer app, tap your camera entry or use the reconnect option to re‑establish the Bluetooth link.
If the problem persists, clear the pairing on both camera and phone and set it up again from scratch.

Camera shows "Connection target not found"

On the camera, go to [Bluetooth settings] → [Check/clear connection info], press SET, and select [OK].
On your phone, open Bluetooth settings and remove / forget the EOS R3 entry.
Start the pairing process again from the beginning and, in the Intervalometer app, use Add new camera to scan for and add the EOS R3 as a new device rather than tapping connect on a stale entry.

If none of these steps solve the issue, contact us at help@intervalometer.app and include your camera model, phone model, and a short description of what happens during pairing.