sensor

Documentation

Index

• type Proximity
  • func NewProximity(pin *io.Gpio) *Proximity
  • func (p *Proximity) Read() (int, error)

Types

type Proximity

type Proximity struct {
	Min, Max int // For range checks
	// contains filtered or unexported fields
}

Proximity represents a driver for the QRE1113 proximity sensor, configured as a digital circuit. This operates by setting the pin as an output, charging a capacitor, and then switching the pin to an input and waiting for the capacitor to discharge through the sensor. The faster the discharge time, the stronger the reflected signal.

func NewProximity

func NewProximity(pin *io.Gpio) *Proximity

NewProximity creates and initialises a Proximity struct.

func (*Proximity) Read

func (p *Proximity) Read() (int, error)

Read triggers the sensor by setting the output pin high to charge the capacitor, then turning it off, and detecting how long the capacitor takes to drain. The duration is returned as the number of microseconds.