The Shimano Di2 E-Tube compatibility chart is here:
http://e-tubeproject.shimano.com/pdf....0.0-01-EN.pdf
If not using the BT-DN1100 battery that's the first thing needed, as Synchro software resides on that battery unit. Generally you do not need the SM-PC1 as you can do component updates via the cable supplied with the 110 battery, connected to a PC based E-Tube software.