w1temp/dist/lib/getSensor.js

Measure temperature through DS18B20 sensor connected to 1wire to Raspberry PI with node.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = getSensor;

var _fileExistsWait = require('./fileExistsWait');

var _fileExistsWait2 = _interopRequireDefault(_fileExistsWait);

var _Sensor = require('./Sensor');

var _Sensor2 = _interopRequireDefault(_Sensor);

var _constants = require('./constants');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function getSensor(sensorUid) {
  var enablePolling = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
  var interval = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 250;
  var onlyIfChanged = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;

  return new Promise(function (resolve, reject) {
    if (!_constants.SENSOR_UID_REGEXP.test(sensorUid)) {
      reject(new Error('Bad sensor uid format'));
    } else if (typeof enablePolling !== 'boolean') {
      reject(new Error('enablePolling must be a boolean'));
    } else if (typeof interval !== 'number' || interval <= 0) {
      reject(new Error('interval must be a number and greater then 0'));
    } else if (typeof onlyIfChanged !== 'boolean') {
      reject(new Error('onlyIfChanged must be a boolean'));
    } else {
      var file = '/sys/bus/w1/devices/' + sensorUid + '/w1_slave';

      (0, _fileExistsWait2.default)(file).then(function () {
        var sensor = new _Sensor2.default(file, enablePolling, interval, onlyIfChanged);
        resolve(sensor);
      }).catch(function () {
        reject(new Error('Cant get sensor instance'));
      });
    }
  });
}