RFLink not working, CH340 drivers missing?

Fresh image from home page on Raspberry Pi 3. Still “/dev/serial” does not show up. My RFLink is on Geekcreit MEGA 2560, so it needs at least CH340 drivers.

RFLinks works. Tested on Raspberry 1 with jessie and on Mac…

Any ideas what could be wrong?

HA 0.60.1