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updated README

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Erik Brakkee 2026-05-26 23:20:07 +02:00
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README.md
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# ANT+ to Bluetooth LE Bridge # ANT+ to Bluetooth LE Bridge
Bridge an ANT+ cycling power trainer over Bluetooth Low Energy, allowing modern devices that don't support ANT+ to receive power and cadence data. Bridge an ANT+ cycling power trainer over Bluetooth Low Energy, allowing modern devices that don't support
ANT+ to receive power and cadence data.
## Why this exists ## Why this exists
Modern training apps and devices (phone apps, many power meter displays) support Bluetooth LE but lack ANT+ radios. Previously, hardware-based Bluetooth-to-ANT+ bridge boxes were available for this purpose, but these have now been discontinued. This project provides a simple, software-based alternative using a standard USB ANT+ dongle. This bridge listens to ANT+ data from a wired trainer and re-broadcasts it as a standard Cycling Power Profile service over BLE. Modern training apps and devices (phone apps, many power meter displays) support Bluetooth LE but lack ANT+ radios.
Previously, hardware-based Bluetooth-to-ANT+ bridges were available for this purpose, but these have now been
discontinued. This project provides a simple, software-based alternative using a standard USB ANT+ dongle.
This bridge listens to ANT+ data from a wired trainer and re-broadcasts it as a standard Cycling Power Profile
service over BLE.
## How it works ## How it works
@ -36,6 +41,8 @@ SUBSYSTEM=="usb", ATTRS{idVendor}=="0fcf", ATTRS{idProduct}=="1008", ENV{MODALIA
EOF EOF
``` ```
The vendor id and product id above can be obtained from the `dmesg` output after inserting the USB dongle.
Then reload the rules and reconnect the dongle: Then reload the rules and reconnect the dongle:
```bash ```bash
@ -106,4 +113,7 @@ make build # Build with ldflags (version, build time)
make clean # Remove build artifacts make clean # Remove build artifacts
``` ```
The Makefile injects the git commit hash and build timestamp via ldflags for version information. ## Known issues
It has been observed that during use the wattage sometimes drops briefly to 0 but then quickly recovers.
Logging will hopefully pinpoint the issue should it occur again.