Hi Michael
> I just uploaded a new raspi3-firmware package which uses ttyS1 on Linux > ≥ 4.14, which is the new device name for the UART on the pin header: > https://anonscm.debian.org/cgit/pkg-raspi/raspi3-firmware.git/commit/?id= > 4da2e6b1576f0a7513bffe7f95882693fdadd7ae Many thanks - this works great! I just verified it by fetching raspi3-firmware (1.20171201-1) from sid: https://github.com/lueschem/edi-pi/commit/d3a1b5055fa4441b7ce42d6827868bdf8e46fdda Best regards Matthias