homebridge-zigbee/lib/utils/mapValueRange.js

ZigBee Platform plugin for HomeBridge

// Map a range of values to a different range of values.
module.exports = function mapValueRange(inputStart, inputEnd, outputStart, outputEnd, input) {
  if (typeof inputStart !== 'number' || typeof inputEnd !== 'number'
  || typeof outputStart !== 'number' || typeof outputEnd !== 'number'
  || typeof input !== 'number') {
    return null
  }
  return outputStart + ((outputEnd - outputStart) / (inputEnd - inputStart)) * (input - inputStart)
}