ANT+ Bicycle Speed and Cadence
Bike speed sensors are devices mounted on a bicycle that measure the speed the bicycle is traveling. This is typically done using a magnet mounted on the wheel spokes and a sensor on the bicycle frame that senses the magnet passing. Bike cadence sensors measure the speed at which the user is pedaling, typically using a magnet attached to the pedal shaft and a sensor mounted on the frame. The standard mode of operation is for the bike speed or cadence sensor to transmit its measured data to the receiving display device. Typically this device is a bike computer, but it could be any ANT+ display device capable of decoding bike speed and cadence information, such as a watch, cell phone, PDA, etc.
The bike speed and cadence sensors communicate with the receiving device in one of four modes:
-
Bike Speed Sensor Only – A single speed sensor on the bike requires a single ANT channel to communicate data.
-
Bike Cadence Sensor Only – A single cadence sensor on the bike requires a single ANT channel to communicate data.
-
Bike Speed and Cadence Sensors – Two sensors on the bike (speed and cadence) each require a single ANTchannel to communicate data. The receiver must have two active channels, composed of modes 1 and 2, open.
-
Combined Bike Speed and Cadence Sensor – This mode has combined both the speed and cadence sensors into a single sensor. One sensor transmits data about the user’s speed and cadence over a single ANT channel.