Version 1 of the PCB is finished, and I ordered the first batch on PCBWay which they kindly offered to sponsor! I'll be doing a review of the boards when they arrive.

I've changed the MCU from CH592 to CH591, since they were a lot cheaper! The BOM is now around $0.5 in quantity 20 to 30, depending a bit on which fab house you choose. The final PCB is only 11x11 mm, which is probably maybe the smallest BLE module on the planet :)

The repository https://github.com/biemster/qible is updated with the latest Gerbers, but the easiest is to go to https://www.pcbway.com/project/shareproject/Tiny_BLE_Beacon_11x11mm_d2e8fc11.html and just add it to you cart (don't forget to change PCB only to PCB+assembly).