Started testing -- with CP PR 1993 installed. -- all of the demos seem to be working. Tried uart, eddystone and both peripheral and central demos.Used 2 nrf52840 express for central<-> peripheral demo.
also I was able to get my previously working "ble_rover" demo working with just the minor change of importing adafruit_ble.uart to adafruit__ble.uart_server.

Just for fun. Also tried central demo on a maker diary nrf52840 usb dongle, only change was to use AINx for Ax for the inputs. works fine.

also tested on a pca10059 (dongle) -- works as well using pins P0_02,P0_29,P0_31 as the analog inputs.

FYI this scanner is a modification of an older version from early ble testing -- it prints out lots of stuff in my house!

from bleio import Scanner

def display_scan_results(scan_entries):
    for e in scan_entries:
        print("ADDR:  ", e.address)
        print("RSSI:  ", e.rssi)
        print("DATA:  ")
        print(''.join('{0:02x}'.format(x) for x in e.advertisement_bytes))

        # Line break between record sets
        print("")

# Scan 1s for advertising devices in range
s = Scanner()
scan_res = s.scan(1)

# Display the scan results
display_scan_results(scan_res)

@tannewt This is ready for re-review. There were a few more global changes after thinking about your feedback and working on the code:

• Field lookup in advertising packets was moved from ScanEntry to AdvertisingPacket. This makes more sense. Both a __getitem__() and a get() are provided, per your feedback.
• Scanner.scan() does de-duplication. Scanner.raw_scan() does not: it just returns all the scan entries.
• Scanner.match() was renamed to Scanner.same_device().