Hi,
Based on the information you provided, it appears that mobile connectivity is not a requirement for your needs. In this case, RUTX10 would probably be the best option for you.
The RUTX10 model offers a range of features. RUTX10 has ethernet ports, Wi-Fi capabilities, and most importantly, support for Bluetooth Low Energy 4.0. Basically, you can read data from Bluetooth sensors and then use the 'Data to Server' functionality to send it across. I recommend taking a look at our wiki page here, which provides more detailed information.
Kind Regards,
Andzej