22 ms·

I don't know why this is being downvoted. The EFM32 is about $1.20@1ku, the rest of the BOM adds up to a few cents, so a no-name Chinese manufacturer could sell

I don't know why this is being downvoted. The EFM32 is about $1.20@1ku, the rest of the BOM adds up to a few cents, so a no-name Chinese manufacturer could sell these for less than $3 shipped and make a reasonable profit. I understand that they have development costs to recoup, but their offer is anything but "super cheap". Even without quantity price breaks, I could build ten for $30.

ReverseCold 8y ago
There are suppliers that you can give the pcb file and BOM and they will make and assemble small runs (10 or so) for cheap. It's open hardware too, so you can just head over to the hardware repo and do that if you don't want to support them.