What cable do I need to connect my Huber unit to a Data Hub and AVA software? You will need an RS232 cable to connect your Huber unit to the Data Hub and so AVA. There are different types of RS232 cable, and it’s important that you select the correct one. For new Huber Unistats with Pilot ONE controller, you will need part number HB55018. This has a 15-pin end for connecting to the Huber, and a 9-pin end for connecting to the Data Hub. For more basic or older Huber models, the cable is usually part number HB6146, which is 9 pin at both ends. However, please contact us with the model and serial number of your unit, so we can confirm.