[nonninz]

> nRF52840 (does latter require blobs for radios?)

Yes it does ([1]).

But honest question are there any chipsets out there which doesn't? Maybe some open source projects? The radio protocols are incredibly complex so I would be (pleasantly) surprised if there was.

[1] https://www.nordicsemi.com/Software-and-tools/Software/S140

[swetland]

Nordic provides binary blobs for BLE, but also provides full register level documentation for the radio peripheral, so there's nothing in the way of an open source radio solution with the NRF52 family parts.

Here's one: https://foundries.io/insights/2018/01/08/20180110-ble-dongle... and I believe there are others out there in various stages of completion.