The u32 must match an Id in a [[Bluetooth_Driver_services#BleConnectionInfo|BleConnectionInfo]] from [[#BleGetConnectionState]] (0xFFFFFFFF is invalid). However, the error is immediately thrown on mismatch, therefore the Id has to match the first [[Bluetooth_Driver_services#BleConnectionInfo|BleConnectionInfo]].
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The u32 must match an Id in a [[Bluetooth_Driver_services#BleConnectionInfo|BleConnectionInfo]] from [[#BleGetConnectionState]] (0xFFFFFFFF is invalid).