I use a PC and Android phone with both Bluetooth and ANT+.
I do this, to set things up first time:
- Download Elite MyEtraining app, go to Parameters choose Direto under Configuration. Make sure you get a green symbol with a number address under “Update in progress” before you choose next (Pedal if it says pedal). If you have external power and cadence sensor and want to use the Elite app answer yes. Type in circumference here or use default and go to Advanced configuration menu an input your wheel circumference in mm either you measure the outside of your wheel or go to below bikecalc link. This will make you go same seed in Zwift as in reality. Also see Elite forum link below for more information and details on Circumference.
Start pedal for 5-10 minutes to warm up the Direto. Do an Trainer calibration in the App and note the value that comes up. (It should be the same as written under your Elite or within one to three numbers difference, I would not try to calibrate the Direto myself). If it differ to much, contact Elite support.
Do Power Smoothing and either take the default number (2) that comes up if you are in relatively good bike form. Power smoothing is handy in training sessions with ERG mode and when there is rapid power changes to delay things for you.
Pair as a Controllable to get resistance feedback. Elite cadence sensor is not good under very low cadence (even say so in the manual) so if you have your own, use that instead. Also if you have your own Power Meter I would use that. If not, use the Elite power meter, never had any issues with it and all tests say very accurate.
After this I calibrate once every month and so far ±3 so I could probably do it less.