Prior to connecting any power meter to the app, you will need to ensure that you have correctly configured that power meter using its own software and that the firmware is up to date. Single-sided power meters may need to be configured so that they double the power from one side rather than try to pair with a second pedal, and dual-sided power meters will need to be configured so that they are paired and report combined power as a single device (which is usually the left side). If your power meter cannot be configured to report combined power and needs to connect as 2 separate units (such as the PowerTap P1), you will need to use ANT+ or the iOS app to get a proper power reading.
How to connect
You can connect your Power Meter to the app using Bluetooth (if available) or ANT+ (with the use of a dongle or bridge)
Here, using an ANT+ dongle, you can see the power meter connection is easy and straightforward. If it does not show up when you tap Add Devices, spin the cranks to wake it up. Single-sided or Dual-sided power meters will show up as a single device and only one connection that can be made.
Using Bluetooth, things might be a little more complicated, depending on which power meter you are using. The first thing you want to check is how the power meter appears in the Add Devices box. If you have a single-sided power meter or if your dual-sided power meter is set up to report in a unified channel, you will get one device connection that appears. Select it. If you have a dual-sided power meter and that you can't set up to report with a single power signal, you might see two devices show up. You will be able to select them both, but only one will actually be able to make a connection to the app. Select the left pedal. In this case, the app may or may not report the correct power, depending on how the power meter manufacturer reports data. In some cases (such as the Powertap P1), you will get 1/2 power reported. Connecting using ANT+ will resolve this issue.
Need any help connecting your other devices? Check out this article: Device Connections
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