alt Hacker News"The SDK is open source" Oh, a BLE MCU with open source code SDK?
AFAICT, the BLE code is provided as a binary blob. https://github.com/OpenSiFli/SiFli-SDK/tree/6c82a9b15db49871...
Which isn't a problem. But, I wish if something is described as "open source", you could read the source code for it.
BLE radio device firmware is always going to be provided as binary blobs for a combination of IP and regulatory reasons.