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We are using the CoreBluetooth framework to communicate with a BLE device. We have the requirement to take many RSSI measures over a short span of time. To obtain these measurements, we call readRSSI on the peripheral object. The behavior we observe is that Core Bluetooth invokes didReadRSSI only once every second. This behavior does not seem to be documented anywhere. We have found several reports of the same issue, which have not been answered. For Example: https://developer.apple.com/forums/thread/698235 https://developer.apple.com/forums/thread/77277 https://stackoverflow.com/questions/61216589/fast-update-rssi-bluetooth-in-ios The first question would be: Is this the intended behavior? Secondly, is it documented somewhere? And lastly, are there any workarounds that would allow for a higher rate of taking RSSI measurements than 1 per second?

CoreBluetooth will only update the RSSI value for a connected BLE device at least one second after the last call to readRSSI, effectively limiting the rate at which the RSSI value can be read to once every second. Is this a momentary measurement, or does it represent some kind of average over this one second? If this is not an average, what is the rationale for limiting the rate at which the RSSI value can be measured? Rate limitation verified in this thread: https://developer.apple.com/forums/thread/739727