antplus-recorder shows and records every ANT+ sensor in range side by side in the terminal. It is built to compare power meters against each other, for example a smart trainer against crank or pedal power meters. One power meter is the reference, and every other one shows how far it is off, in watts and percent.

The Wahoo trainer is the reference. The Stages crank reads 0.9% lower over the 30 second average.

An ANT+ USB stick (ANT USB2 or ANT USB-m) is required. Python is not needed up front, uv fetches the right one by itself, and libusb comes along as a dependency. There is no pairing. The stick listens to the whole ANT+ frequency and every sensor that sends shows up on its own.

On a Mac, step by step

1. Plug in the ANT+ stick and allow the accessory to connect when macOS asks.
2. Open the Terminal app: press ⌘ Space, type Terminal and press Enter.
3. Paste this line and press Enter. It installs uv and only has to be done once:

   curl -LsSf https://astral.sh/uv/install.sh | sh

4. Close the Terminal window, open a new one, paste this and press Enter:

   uvx antplus-recorder@latest

From then on, the last step is all it takes. The @latest makes it check for a new version every time and update itself. Recordings are saved in the folder the Terminal is in, which is your home folder unless you changed it.

Linux

The stick needs read/write access for your user. Untested, but this udev rule in /etc/udev/rules.d/42-ant-usb-sticks.rules should do it, followed by sudo udevadm control --reload-rules and replugging the stick:

SUBSYSTEM=="usb", ATTRS{idVendor}=="0fcf", ATTRS{idProduct}=="1008", MODE="0666"
SUBSYSTEM=="usb", ATTRS{idVendor}=="0fcf", ATTRS{idProduct}=="1009", MODE="0666"