Originally Posted by
DaveLeeNC
Having a 'button to push' on the sensor to make it send 'additional pairing info' would not be surprising. But do any Ant+ sensors work that way? I have only seen one (Bontrager Speed/Cadence pair of sensors) and there is no button. So I assume that, much like the Netgear router in my house, anytime the sensor is actively sending data it is also sending the required pairing data.
I was looking at ANT Message Protocol and Usage Rev 5.1. But looking a little more closely, it seems there are a couple of implementation options. One involves a "pairing" bit set in the Channel ID of the master (sensor). That requires some action by the sensor to enter the mode. But I guess it is also possible to simply have the slave (head unit) search without following the pairing bit. That way the master doesn't need to do anything. I guess the idea is that "pairing mode" is intended to reduce false (unintended) pairings in some environments. It would help to have the ANT+ docs but I think you have to be a member of ANT+ consortium to access them (didn't look for them uploaded elsewhere).
I have a Garmin GSC-10 sensor and that has a "reset" button.
FWIW the ChannelID data format:
scott s.
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