@cybereye there are two points in the code that might be interesting to you.
The first is within
messenger.js and this is where data is received directly from the BLE113A chip. If you don't see data you expect here, then it was never sent by the BLE113A module and the sensors are presumably not able to be detected. You should put a console.log just within this event listener and print out the data. You'll need to download the BLE113A datasheet from the bluegiga.com website in order to parse it yourself.
The second is just after
messenger.js goes through the packet parsing process (calling into bglib). It's possible that the packets aren't being parsed properly but I think that's unlikely because you would either get an error thrown or just see a strange packet being parsed by bglib.
One issue could be the way that the ble module is trying to discover devices. By default, the BLE module scans for devices in "limited or generic mode". I'm not well informed about the different type of modes but it's possible that your sensors are neither. You may want to change line 97 in messenger.js to:
this.execute(bglib.api.gapDiscover, [this.bgLib.GAPDiscoverMode.gap_discover_observation], callback);