I have both devices. When you pair the Assioma to the 1030, it will automatically know that it will get cadence and power. You just need to pair it once as a power meter, and the two will do the rest on their own.
No, you do not need a separate cadence sensor. I ditched my cadence sensor when I got my pedal power meter.
No, you do not need a separate cadence sensor. I ditched my cadence sensor when I got my pedal power meter.