Sensor Channels

Channels, enumerated in sensor_channel, are quantities that a sensor device can measure.

Sensors may have multiple channels, either to represent different axes of the same physical property (e.g. acceleration); or because they can measure different properties altogether (ambient temperature, pressure and humidity). Sensors may have multiple channels of the same measurement type to enable measuring many readings of perhaps temperature, light intensity, amperage, voltage, or capacitance for example.

A channel is specified in Zephyr using a sensor_chan_spec which is a pair containing both the channel type (sensor_channel) and channel index. At times only sensor_channel is used but this should be considered historical since the introduction of sensor_chan_spec for Zephyr 3.7.