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, 19 September
[https://www.mouser.com/datasheet/2/52/Leaflet_WF121_lowres-4334.pdf Brochure]
[https://www.mouser.com/datasheet/2/368/Bluegiga_WF121_Datasheet-1203323.pdf Data Sheet v1.4.9 2013]
[https://www.silabs.com/documents/public/data-sheets/WF121-DataSheet.pdf Data Sheet v2.0.1 2024]