code: function demo(dht1, dht2) {
      dht1.set('beep', 'boop', function (err) {
          if (err) throw err;
          dht2.get('beep', function (err, value) {
              if (err) throw err;
              console.log('%s === %s', 'boop', value);
          });
      });
  }
docs: Store a value on one side and get it back on the other side.