Pico W: network scanning shows a lot of duplicates

[dhalbert]

When using wifi.radio.start_scanning_networks() on the Pico W, I see many duplicates. I have two AP's with the same SSID, plus, another different one. For example (SSID's obfuscated):

Available WiFi networks:
	MyHome		RSSI: -77	Channel: 6
	MyHome		RSSI: -37	Channel: 6
	Neighbor		RSSI: -88	Channel: 8
	MyHome		RSSI: -79	Channel: 6
	MyHome		RSSI: -39	Channel: 6
	MyHome		RSSI: -37	Channel: 6
	MyHome		RSSI: -42	Channel: 6
	MyHome		RSSI: -81	Channel: 6
	MyHome		RSSI: -41	Channel: 6
	MyHomeOther		RSSI: -94	Channel: 11
	MyHome		RSSI: -81	Channel: 6
	MyHome		RSSI: -43	Channel: 6
	MyHome		RSSI: -38	Channel: 6
	MyHome		RSSI: -39	Channel: 6
	MyHome		RSSI: -76	Channel: 6
	MyHome		RSSI: -39	Channel: 6

This contrasts with the ESP32-S2 results:

	MyHome		RSSI: -54	Channel: 6
	MyHome		RSSI: -70	Channel: 6
	Neighbor		RSSI: -86	Channel: 6

[jepler]

Same with pico-sdk's example scanner. it's an upstream bug but I have not reported it because I doubt it'll be addressed.

ssid:                                  rssi:  -90 chan:   1 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid:                                  rssi:  -96 chan:   6 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 1)                 rssi:  -70 chan:   7 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 1)                 rssi:  -71 chan:   7 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -57 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -55 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -54 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -54 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -54 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 2)                 rssi:  -54 chan:   9 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 4)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 4)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 3)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 0
ssid: (access point 1)                 rssi:  -57 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 3
ssid: (access point 4)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 4)                 rssi:  -57 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 4)                 rssi:  -57 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 3)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 0
ssid: (access point 1)                 rssi:  -59 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 3
ssid: (access point 3)                 rssi:  -58 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 0
ssid: (access point 4)                 rssi:  -56 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 3)                 rssi:  -60 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 0
ssid: (access point 1)                 rssi:  -61 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 3
ssid: (access point 4)                 rssi:  -62 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5
ssid: (access point 4)                 rssi:  -61 chan:  11 mac: xx:xx:xx:xx:xx:xx sec: 5