simulated-fan.groovy

// Developer: josh@sharptools.io
metadata {
    definition (name: "Simulated Fan", namespace: "sharptools/testing", author: "josh") {
        capability "Actuator"
        capability "Sensor"
        capability "Fan Control"
        command "cycleSpeed"
    }
}

def installed() {
    log.trace "Executing 'installed'"
    initialize()
    setSpeed('off')
}

def updated() {
    log.trace "Executing 'updated'"
    initialize()
}

private initialize() {
    log.trace "Executing 'initialize'"
}

def cycleSpeed(){
    def cycleSpeeds = ["off","low","medium-low","medium","high"]
    //find the current index
    def currentIndex = cycleSpeeds.indexOf(device.currentValue("speed"))
    //calculate the next index 
    def nextIndex = (currentIndex + 1 > cycleSpeeds.size() - 1) ? 0 : currentIndex + 1
    //set the speed
    log.trace "Executed 'cycleSpeed'. Next speed: ${cycleSpeeds[nextIndex]}"
    setSpeed(cycleSpeeds[nextIndex])
}

def setSpeed(speed){
    log.trace "Executing 'setSpeed' to ${speed}"
    if(isValidSpeed(speed))
        sendEvent(name: "speed", value: speed, isStateChange: true)
    else
        log.warn "Invalid speed: ${speed}"
}

def isValidSpeed(speed){
    def validSpeeds = ["low","medium-low","medium","medium-high","high","on","off","auto"]
    return validSpeeds.contains(speed)
}