Bluetooth - updating multiple notify characteristics at the same time

[james_]

I am building a simple bluetooth server using a FiPy. The server has 1 service has a handful of characteristics. 2 of which are setup as notify.

I am trying to periodically update the 2 notify characteristics with new values by calling .value(...) on the 2 characteristics.

When I connect with a test device, I only ever see 1 of the 2 characteristics update.

I can set a small timeout (~100ms) like this

Timer.Alarm(handler=lambda args: char.value(counter*2), ms=50, periodic=False)

and update them both, but not at the same time.

Are there limitations on how ble.char.value(...) can be called?