setAdvertisting serviceData data length max?

So actually I figured it out that I was running int he max_size of a single advertistment packet.

I instead tried to split it up into 2 advertistment packets but it was not working right. Is the below code something that should work?

NRF.setAdvertising([{0xFFFF : [buttonEpoch]},{0x180F:[batteryLevel]}])­;